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Articles de revues sur le sujet « Microrecordings »

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Auteur : Grafiati
Publié le 11 mars 2023

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1

Benazzouz, Abdelhamid, Sorin Breit, Adnan Koudsie, Pierre Pollak, Paul Krack et Alim-Louis Benabid. « Intraoperative microrecordings of the subthalamic nucleus in Parkinson's disease ». Movement Disorders 17, S3 (mars 2002) : S145—S149. http://dx.doi.org/10.1002/mds.10156.

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Mrakic-Sposta, Simona, Sara Marceglia, Marcello Egidi, Giorgio Carrabba, Paolo Rampini, Marco Locatelli, Guglielmo Foffani et al. « Extracellular spike microrecordings from the subthalamic area in Parkinson’s disease ». Journal of Clinical Neuroscience 15, no 5 (mai 2008) : 559–67. http://dx.doi.org/10.1016/j.jocn.2007.02.091.

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Cordella, Roberto, F. Carella, A. Franzini, C. Marras, F. Villani, G. Messina, G. Tringali et G. Broggi. « Intraoperative microrecordings in the posterior hypothalamus of anaesthetized humans with aggressive behaviour ». Neurological Sciences 31, no 2 (5 février 2010) : 183–88. http://dx.doi.org/10.1007/s10072-010-0217-5.

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Taha, Jamal M., Jacques Favre, Thomas K. Baumann et Kim J. Burchiel. « Tremor control after pallidotomy in patients with Parkinson's disease : correlation with microrecording findings ». Neurosurgical Focus 2, no 3 (mars 1997) : E4. http://dx.doi.org/10.3171/foc.1997.2.3.5.

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The goals of this study were to analyze the effect of pallidotomy on parkinsonian tremor and to ascertain whether an association exists between microrecording findings and tremor outcome. Forty-four patients with Parkinson's disease (PD) who had drug-induced dyskinesia, bradykinesia, rigidity, and tremor underwent posteroventral pallidotomy. Using a 1-μ-tip tungsten electrode, microrecordings were obtained through one to three tracts, starting 10 mm above the pallidal base. Tremor severity was measured on a patient-rated, 100-mm Visual Analog Scale (VAS), both preoperatively and 3 to 9 months (mean 6 months) postoperatively. Preoperatively, tremor was rated as 50 mm or greater in 24 patients (55%) and as less than 25 mm in 13 patients (30%). Postoperatively, tremor was rated as 50 mm or greater in five patients (11%) and less than 25 mm in 29 patients (66%). The difference was significant (p = 0.0001). Four patients (9%) had no postoperative tremor. Tremor improved by at least 50% in eight (80%) of 10 patients in whom tremor-synchronous cells were recorded (Group A) and in 12 (35%) of 34 patients in whom tremor-synchronous cells were not recorded (Group B). This difference was significant (p = 0.03). Tremor improved by at least 50 mm in all (100%) of the seven Group A patients with severe (>= 50 mm) preoperative tremor and in nine (53%) of 17 Group B patients with severe preoperative tremor. This difference was also significant (p = 0.05). The authors proffer two conclusions: 1) after pallidotomy, tremor improves by at least 50% in two-thirds of patients with PD who have severe (>= 50 mm on the VAS) preoperative tremor; and 2) better tremor control is obtained when tremor-synchronous cells are included in the lesion.
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Taha, Jamal M., Jacques Favre, Thomas K. Baumann et Kim J. Burchiel. « Tremor control after pallidotomy in patients with Parkinson's disease : correlation with microrecording findings ». Journal of Neurosurgery 86, no 4 (avril 1997) : 642–47. http://dx.doi.org/10.3171/jns.1997.86.4.0642.

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✓ The goals of this study were to analyze the effect of pallidotomy on parkinsonian tremor and to ascertain whether an association exists between microrecording findings and tremor outcome. Forty-four patients with Parkinson's disease who had drug-induced dyskinesia, bradykinesia, rigidity, and tremor underwent posteroventral pallidotomy. Using a 1-µ-tip tungsten electrode, microrecordings were obtained through one to three tracts, starting 10 mm above the pallidal base. Tremor severity was measured on a patient-rated, 100-mm Visual Analog Scale (VAS), both preoperatively and 3 to 9 months (mean 6 months) postoperatively. Preoperatively, tremor was rated as 50 mm or greater in 24 patients (55%) and as less than 25 mm in 13 patients (30%). Postoperatively, tremor was rated as 50 mm or greater in five patients (11%) and less than 25 mm in 29 patients (66%). The difference was significant (p = 0.0001). Four patients (9%) had no postoperative tremor. Tremor improved by at least 50% in eight (80%) of 10 patients in whom tremor-synchronous cells were recorded (Group A) and in 12 (35%) of 34 patients in whom tremor-synchronous cells were not recorded (Group B). This difference was significant (p = 0.03). Tremor improved by at least 50 mm in all (100%) of the seven Group A patients with severe (≥ 50 mm) preoperative tremor and in nine (53%) of 17 Group B patients with severe preoperative tremor. This difference was also significant (p = 0.05). The authors proffer two conclusions: 1) after pallidotomy, tremor improves by at least 50% in two-thirds of patients with Parkinson's disease who have severe (≥ 50 mm on the VAS) preoperative tremor; and 2) better tremor control is obtained when tremor-synchronous cells are included in the lesion.
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Hamel, W., U. Fietzek, A. Morsnowski, B. Schrader, D. Weinert, D. Müller, G. Deuschl et H. M. Mehdorn. « Subthalamic Nucleus Stimulation in Parkinson’s Disease : Correlation of Active Electrode Contacts with Intraoperative Microrecordings ». Stereotactic and Functional Neurosurgery 80, no 1-4 (2003) : 37–42. http://dx.doi.org/10.1159/000075158.

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Gao, D. M., L. Jeaugey, S. Lavallee, D. Hoffmann, P. Pollak et A. L. Benabid. « Micro- and Semi-Microrecordings in the Ventral Thalamus of Human Patients and Monkeys with Dyskinesias ». Stereotactic and Functional Neurosurgery 60, no 1-3 (1993) : 146. http://dx.doi.org/10.1159/000100601.

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Klempíř, Ondřej, et Radim Krupička. « Analysis of Neural Activity of the Human Basal Ganglia in Dystonia : a Review ». Lékař a technika - Clinician and Technology 49, no 2 (1 juillet 2019) : 66–71. http://dx.doi.org/10.14311/ctj.2019.2.05.

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Deep brain stimulation of the globus pallidus internus is an efective symptomatic treatment for pharmacoresistant dystonic syndromes, where pathophysiological mechanisms of action are not yet fully understood. The aim of this review article is to provide an overview of the state-of-the-art approaches for processing of microelectrode recordings in dystonia; in order to define biomarkers to identify patients who will benefit from the clinical deep brain stimulation. For this purpose, the essential elements of microelectrode processing are examined. Next, we investigate a real example of spike sorting processing in this field. Herein, we describe baseline elements of microrecordings processing including data collection, preprocessing phase, features computation, spike detection and sorting and finally, advanced spike train data analysis. This study will help readers acquire the necessary information about these elements and their associated techniques. Thus, this study is supposed to assist during identification and proposal of interesting clinical hypotheses in the field of single unit neuronal recordings in dystonia.
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Sieger, Tomáš, Tereza Serranová, Filip Růžička, Pavel Vostatek, Jiří Wild, Daniela Šťastná, Cecilia Bonnet et al. « Distinct populations of neurons respond to emotional valence and arousal in the human subthalamic nucleus ». Proceedings of the National Academy of Sciences 112, no 10 (23 février 2015) : 3116–21. http://dx.doi.org/10.1073/pnas.1410709112.

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Both animal studies and studies using deep brain stimulation in humans have demonstrated the involvement of the subthalamic nucleus (STN) in motivational and emotional processes; however, participation of this nucleus in processing human emotion has not been investigated directly at the single-neuron level. We analyzed the relationship between the neuronal firing from intraoperative microrecordings from the STN during affective picture presentation in patients with Parkinson’s disease (PD) and the affective ratings of emotional valence and arousal performed subsequently. We observed that 17% of neurons responded to emotional valence and arousal of visual stimuli according to individual ratings. The activity of some neurons was related to emotional valence, whereas different neurons responded to arousal. In addition, 14% of neurons responded to visual stimuli. Our results suggest the existence of neurons involved in processing or transmission of visual and emotional information in the human STN, and provide evidence of separate processing of the affective dimensions of valence and arousal at the level of single neurons as well.
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Klempíř, O., R. Krupička, T. Sieger et R. Jech. « P07-Automatic pallidal neurons recognition based on the detection of the number of clusters from microrecordings in dystonia ». Clinical Neurophysiology 129, no 4 (avril 2018) : e15-e16. http://dx.doi.org/10.1016/j.clinph.2018.01.052.

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Leone, M., A. Proietti Cecchini, A. Franzini, G. Broggi, P. Cortelli, P. Montagna, A. May et al. « Lessons From 8 Years' Experience of Hypothalamic Stimulation in Cluster Headache ». Cephalalgia 28, no 7 (juillet 2008) : 789–97. http://dx.doi.org/10.1111/j.1468-2982.2008.01627.x.

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Neuroimaging studies in cluster headache (CH) patients have increased understanding of attack-associated events and provided clues to the pathophysiology of the condition. They have also suggested stimulation of the ipsilateral posterior inferior hypothalamus as a treatment for chronic intractable CH. After 8 years of experience, stimulation has proved successful in controlling the pain attacks in almost 60% of chronic CH patients implanted at various centres. Although hypothalamic implant is not without risks, it has generally been performed safely. Implantation affords an opportunity to perform microrecordings of individual posterior hypothalamic neurons. These studies are at an early stage, but suggest the possibility of identifying precisely the target site by its electrophysiological characteristics. Autonomic studies of patients undergoing posterior hypothalamic stimulation provide further evidence that long-term stimulation is safe, revealing that it can cause altered modulation of the mechanisms of orthostatic adaptation without affecting the baroreflex, cardiorespiratory interactions or efferent sympathetic and vagal functions. Chronically stimulated patients have an increased threshold for cold pain at the site of the first trigeminal branch ipsilateral to the stimulated side; when the stimulator is switched off, changes in sensory and pain thresholds do not occur immediately, suggesting that long-term stimulation is required to induce sensory and nociceptive changes. Posterior inferior hypothalamic stimulation is now established as a treatment for many chronic CH patients. The technique is shedding further light on the pathophysiology of the disease, and is also providing clues to functioning of the hypothalamus itself.
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Contarino, M. Fiorella, Maarten Bot, Johannes D. Speelman, Rob M. A. de Bie, Marina A. Tijssen, Damiaan Denys, Lo J. Bour, P. Richard Schuurman et Pepijn van den Munckhof. « Postoperative Displacement of Deep Brain Stimulation Electrodes Related to Lead-Anchoring Technique ». Neurosurgery 73, no 4 (9 juillet 2013) : 681–88. http://dx.doi.org/10.1227/neu.0000000000000079.

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Abstract BACKGROUND: Displacement of deep brain stimulation (DBS) electrodes may occur after surgery, especially due to large subdural air collections, but other factors might contribute. OBJECTIVE: To investigate factors potentially contributing to postoperative electrode displacement, in particular, different lead-anchoring techniques. METHODS: We retrospectively analyzed 55 patients (106 electrodes) with Parkinson disease, dystonia, tremor, and obsessive-compulsive disorder in whom early postoperative and long-term follow-up computed tomography (CT) was performed. Electrodes were anchored with a titanium microplate or with a commercially available plastic cap system. Two independent examiners determined the stereotactic coordinates of the deepest DBS contact on early postoperative and long-term follow-up CT. The influence of age, surgery duration, subdural air volume, use of microrecordings, fixation method, follow-up time, and side operated on first was assessed. RESULTS: Subdural air collections measured on average 4.3 ± 6.2 cm3. Three-dimensional (3-D) electrode displacement and displacement in the X, Y, and Z axes significantly correlated only with the anchoring method, with larger displacement for microplate-anchored electrodes. The average 3-D displacement for microplate-anchored electrodes was 2.3 ± 2.0 mm vs 1.5 ± 0.6 mm for electrodes anchored with the plastic cap (P = .030). Fifty percent of the microplate-anchored electrodes showed 2-mm or greater (potentially relevant) 3-D displacement vs only 25% of the plastic cap–anchored electrodes (P < .01). CONCLUSION: The commercially available plastic cap system is more efficient in preventing postoperative DBS electrode displacement than titanium microplates. A reliability analysis of the electrode fixation is warranted when alternative anchoring methods are used.
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Lefranc, Michel, Stéphane Derrey, Philippe Merle, Mélissa Tir, Jean-Marc Constans, Dominique Montpellier, Jean Michel Macron et al. « High-Resolution 3-Dimensional T2*-Weighted Angiography (HR 3-D SWAN) ». Neurosurgery 74, no 6 (14 février 2014) : 615–27. http://dx.doi.org/10.1227/neu.0000000000000319.

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ABSTRACT BACKGROUND: Subthalamic nucleus deep brain stimulation (STN-DBS) is an established treatment for Parkinson's disease. OBJECTIVE: To characterize an optimized magnetic resonance imaging (MRI) sequence (high-resolution 3-dimensional T2*-weighted angiography [HR 3-D SWAN]) for direct STN targeting. METHODS: Sequence distortions were measured using the Leksell stereotactic phantom. Eight consecutive candidates for STN-DBS underwent HR 3-D SWAN MRI for direct identification of the 16 STN. Two senior neurosurgeons independently determined the boundaries of STN on a semiquantitative scale (ranging from 1 [identification very easy] to 4 [identification very difficult]) and the anatomic target within the nucleus. The anatomic data were compared with electrophysiological recordings (48 microrecordings). We examined the anatomic location of the active contacts on MRI. RESULTS: The mean distortion error over the phantom was 0.16 mm. For the 16 STNs, identification of the upper, internal, anterior, and external edges was considered to be easy (scores of 1 or 2). The distinction between the substantia nigra and the STN was rated 1 or 2 for all but 6 nuclei. In the mediolateral axis, electrophysiological recordings covered perfectly anatomic data. In the craniocaudal axis, the mean differences between the electrophysiological data and the anatomic data were 0.8 mm and 0.19 mm for the “entry” and “exit” of the STN, respectively. All active contacts were located within the STN on MRI. CONCLUSION: HR 3-D SWAN allows easy visualization of the STN. Adapted to stereotactic requirement, the sequence simplifies direct targeting in STN-DBS surgery.
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Iijima, Keiya, Masafumi Hirato, Takaaki Miyagishima, Keishi Horiguchi, Kenichi Sugawara, Junko Hirato, Hideaki Yokoo et Yuhei Yoshimoto. « Microrecording and image-guided stereotactic biopsy of deep-seated brain tumors ». Journal of Neurosurgery 123, no 4 (octobre 2015) : 978–88. http://dx.doi.org/10.3171/2014.10.jns14963.

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OBJECT Image-guided stereotactic brain tumor biopsy cannot easily obtain samples of small deep-seated tumor or selectively sample the most viable region of malignant tumor. Image-guided stereotactic biopsy in combination with depth microrecording was evaluated to solve such problems. METHODS Operative records, MRI findings, and pathological specimens were evaluated in 12 patients with small deep-seated brain tumor, in which image-guided stereotactic biopsy was performed with the aid of depth microrecording. The tumors were located in the caudate nucleus (1 patient), thalamus (7 patients), midbrain (2 patients), and cortex (2 patients). Surgery was performed with a frameless stereotactic system in 3 patients and with a frame-based stereotactic system in 9 patients. Microrecording was performed to study the electrical activities along the trajectory in the deep brain structures and the tumor. The correlations were studied between the electrophysiological, MRI, and pathological findings. Thirty-two patients with surface or large brain tumor were also studied, in whom image-guided stereotactic biopsy without microrecording was performed. RESULTS The diagnostic yield in the group with microrecording was 100% (low-grade glioma 4, high-grade glioma 4, diffuse large B-cell lymphoma 3, and germinoma 1), which was comparable to 93.8% in the group without microrecording. The postoperative complication rate was as low as that of the conventional image-guided method without using microelectrode recording, and the mortality rate was 0%, although the target lesions were small and deep-seated in all cases. Depth microrecording revealed disappearance of neural activity in the tumor regardless of the tumor type. Neural activity began to decrease from 6.3 ± 4.5 mm (mean ± SD) above the point of complete disappearance along the trajectory. Burst discharges were observed in 6 of the 12 cases, from 3 ± 1.4 mm above the point of decrease of neural activity. Injury discharges were often found at 0.5–1 mm along the trajectory between the area of decreased and disappeared neural activity. Close correlations between electrophysiological, MRI, and histological findings could be found in some cases. CONCLUSIONS Image-guided stereotactic biopsy performed using depth microrecording was safe, it provided accurate positional information in real time, and it could distinguish the tumor from brain structures during surgery. Moreover, this technique has potential for studying the epileptogenicity of the brain tumor.
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Cuny, Emmanuel, Dominique Guehl, Pierre Burbaud, Christian Gross, Vincent Dousset et Alain Rougier. « Lack of agreement between direct magnetic resonance imaging and statistical determination of a subthalamic target : the role of electrophysiological guidance ». Journal of Neurosurgery 97, no 3 (septembre 2002) : 591–97. http://dx.doi.org/10.3171/jns.2002.97.3.0591.

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Object. The goal of this study was to determine the most suitable procedure(s) to localize the optimal site for high-frequency stimulation of the subthalamic nucleus (STN) for the treatment of advanced Parkinson disease. Methods. Stereotactic coordinates of the STN were determined in 14 patients by using three different methods: direct identification of the STN on coronal and axial T2-weighted magnetic resonance (MR) images and indirect targeting in which the STN coordinates are referred to the anterior commissure—posterior commissure (AC—PC) line, which, itself, is determined either by using stereotactic ventriculography or reconstruction from three-dimensional (3D) MR images. During the surgical procedure, electrode implantation was guided by single-unit microrecordings on multiple parallel trajectories and by clinical assessment of stimulations. The site where the optimal functional response was obtained was considered to be the best target. Computerized tomography scanning was performed 3 days later and the scans were combined with preoperative 3D MR images to transfer the position of the best target to the same system of stereotactic coordinates. An algorithm was designed to convert individual stereotactic coordinates into an all-purpose PC-referenced system for comparing the respective accuracy of each method of targeting, according to the position of the best target. Conclusions. The target that is directly identified by MR imaging is more remote (mainly in the lateral axis) from the site of the optimal functional response than targets obtained using other procedures, and the variability of this method in the lateral and superoinferior axes is greater. In contrast, the target defined by 3D MR imaging is closest to the target of optimal functional response and the variability of this method is the least great. Thus, 3D reconstruction adjusted to the AC—PC line is the most accurate technique for STN targeting, whereas direct visualization of the STN on MR images is the least effective. Electrophysiological guidance makes it possible to correct the inherent inaccuracy of the imaging and surgical techniques and is not designed to modify the initial targeting.
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Slavin, Konstantin V. « Intra-operative microrecording equipment : Comparative analysis of commercially available microrecording systems ». Neurological Research 24, no 6 (septembre 2002) : 544–54. http://dx.doi.org/10.1179/016164102101200519.

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Quiñones-Molina, R., H. Molina, Ch Ohye, R. Macias, A. Alaminos, L. Alvarez, J. Teijeiro et al. « CT-Oriented Microrecording Guided Selective Thalamotomy ». Stereotactic and Functional Neurosurgery 62, no 1-4 (1994) : 200–203. http://dx.doi.org/10.1159/000098619.

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Rau, E. I. « Microrecording and information reproduction with SEM ». Scanning 10, no 5 (1988) : 207–9. http://dx.doi.org/10.1002/sca.4950100508.

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Slavin, Konstantin V., Thomas K. Baumann et Kim J. Burchiel. « Treatment of hemiballismus with stereotactic pallidotomy ». Neurosurgical Focus 17, no 1 (juillet 2004) : 43–46. http://dx.doi.org/10.3171/foc.2004.17.1.7.

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Hemiballismus is a relatively rare movement disorder that is characterized by uncontrolled, random, large-amplitude movements of the limbs. It is usually caused by a vascular lesion that involves the contralateral subthalamic nucleus (STN) (also known as the nucleus hypothalamicus or corpus luysi) and its afferent and efferent pathways. The authors present a case of medically intractable hemiballismus in a 70-year-old woman who was successfully treated with stereotactic posteroventral pallidotomy. In agreement with the data reported earlier by other groups, the microrecording performed during the pallidotomy showed a decreased rate of firing of the pallidal neurons, supporting the theory of impaired excitatory input from the STN to the internal part of the globus pallidus. Stereotactic pallidotomy may be the procedure of choice in the treatment of medically intractable hemiballismus. Intraoperative microrecording significantly improves the precision of the stereotactic targeting and should be considered a standard part of the pallidotomy protocol.
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Ohye, C., T. Shibazaki, M. Hirato, Y. Kawashima et M. Matsumura. « Strategy of Selective VIM Thalamotomy Guided by Microrecording ». Stereotactic and Functional Neurosurgery 54, no 1-8 (1990) : 186–91. http://dx.doi.org/10.1159/000100211.

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Favre, J., J. M. Taha, T. K. Baumann, B. Coombs, J. Szumowski et K. J. Burchiel. « Is MRI Accurate Enough To Perform Pallidotomy Without Microrecording ? » Neurosurgery 39, no 3 (1 septembre 1996) : 640–41. http://dx.doi.org/10.1097/00006123-199609000-00066.

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Taha, Jamal M., Arif Dalvi, Ray Pun, Michele Janszen, Deborah Mills et Fredrick Samaha. « Pallidotomy for Parkinson's Disease : Correlation of Intraoperative Microrecording and Outcome ». Neurosurgery 43, no 3 (septembre 1998) : 705–6. http://dx.doi.org/10.1097/00006123-199809000-00317.

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Hirato, Masafumi, Takaaki Miyagishima, Akio Takahashi et Yuhei Yoshimoto. « Stereotactic Selective Thalamotomy for Focal Dystonia with Aid of Depth Microrecording ». World Neurosurgery 117 (septembre 2018) : e349-e361. http://dx.doi.org/10.1016/j.wneu.2018.06.033.

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Ohye, Chihiro. « From Selective Thalamotomy with Microrecording to Gamma Thalamotomy for Movement Disorders ». Stereotactic and Functional Neurosurgery 84, no 4 (2006) : 155–61. http://dx.doi.org/10.1159/000094954.

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Kobayashi, Kazutaka, Toshikazu Kano, Hideki Oshima, Chikashi Fukaya, Atsuo Yoshino, Takamitsu Yamamoto et Yoichi Katayama. « S9-5. Pathophysiology of dystonia based on the findings of microrecording ». Clinical Neurophysiology 124, no 8 (août 2013) : e23. http://dx.doi.org/10.1016/j.clinph.2013.02.045.

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Shima, Fumio, Takato Morioka, Shozo Tobimatsu, Omiros Kavaklis, Motohiro Kato et Masashi Fukui. « Localization of Stereotactic Targets by Microrecording of Thalamic Somatosensory Evoked Potentials ». Neurosurgery 28, no 2 (1 février 1991) : 223–30. http://dx.doi.org/10.1227/00006123-199102000-00008.

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Abstract To improve the localization of stereotactic targets, somatosensory evoked potentials (SEPs) were recorded from the thalamus and subthalamic area using a specially designed semimicroelectrode in 61 patients and a conventional “macroclectrode” in 17 patients. By means of the semimicroelectrode, median nerve stimulation evoked two distinct SEPs, consisting of a diphasic wave with a huge positivity restricted to the nucleus ventrocaudalis (Vc) and a triphasic wave of lower amplitude with a major negativity in the ventral part of the nucleus ventrointermedius (Vim) and nucleus ventrooralis posterior (Vop) as well as the subthalamic lemniscal pathway. The Vim-Vc junction could thus be clearly delineated by an abrupt transition of SEPs from one type to the other with a precision of 1 mm. The parvicellular part of the Vc (Vcpc). situated in its basal region, was distinguishable from the Vc proper by a significant reduction of the positivity elicited by stimulation of the median nerve and by a rapid growth of a diphasic SEPs to stimulation of the posterior tibial nerve. In the other thalamic nuclei, stimulation of the median nerve elicited triphasic SEPs of a very small amplitude, suggesting a volume conduction current from the lemniscal pathway. With the macroclectrode, the positivity in the Vc was sensitive to electrode manipulation and the thalamic nuclei could not be distinctly outlined. SEP monitoring using the semimicroelectrode significantly improved the precision of target localization, which allowed minimizing of the volume of the therapeutic lesion without losing surgical effectiveness, while avoiding complications associated with increased penetration of the coagulating electrode. It is suggested that recording serial thalamic SEPs with the semimicroelectrode is a practical method to refine stereotactic targets in the thalamus.
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Favre, J., J. M. Taha, T. K. Baumann, B. Coombs, J. Szumowski et K. J. Burchiel. « Is MRI Accurate Enough To Perform Pallidotomy Without Microrecording ? Paper#716 ». Neurosurgery 39, no 3 (septembre 1996) : 640. http://dx.doi.org/10.1227/00006123-199609000-00066.

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Ohye, C., T. Shibazaki, T. Hirai, M. Matsumura, Y. Kawashima et M. Hirato. « Microrecording for the Study of Thalamic Organization, for Tumor Biopsy and Removal ». Stereotactic and Functional Neurosurgery 52, no 2-4 (1989) : 136–44. http://dx.doi.org/10.1159/000099494.

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Verhagen, Rens, P. Richard Schuurman, Pepijn van den Munckhof, M. Fiorella Contarino, Rob M. A. de Bie et Lo J. Bour. « Comparative study of microrecording-based STN location and MRI-based STN location ». Parkinsonism & ; Related Disorders 22 (janvier 2016) : e108. http://dx.doi.org/10.1016/j.parkreldis.2015.10.244.

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Katayama, Y., H. Oshima, C. Fukaya et T. Yamamoto. « S13-5 Thalamic microrecording and stimulation in patients with phantom limb pain ». Clinical Neurophysiology 121 (octobre 2010) : S25. http://dx.doi.org/10.1016/s1388-2457(10)60103-4.

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Ohye, Chihiro, Tohru Shibazaki, Jie Zhang et Yoshitaka Andou. « Thalamic lesions produced by gamma thalamotomy for movement disorders ». Journal of Neurosurgery 97 (décembre 2002) : 600–606. http://dx.doi.org/10.3171/jns.2002.97.supplement_5.0600.

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Object. The treatment of Parkinson disease and other kinds of involuntary movement by gamma knife radiosurgery (GKS) is presented. This is an extension of previous work. The clinical course and thalamic lesions were the main factors examined. Methods. Seventeen new cases were added to the previously reported 36 cases. The course and results for the whole series of 53 patients were examined. Treatment was undertaken using a single 4-mm collimator shot to deliver 130 Gy to the target. The target was determined in the previously treated patients by using classic methods involved in conventional stereotactic thalamotomy with microrecording. More recently, target localization has been performed by relating the target point to the total length of the thalamus. Points may then be defined as percentages of that length measured from the anterior pole. Targets can then be determined in relationship to the appropriate percentage. Thirty-five patients have been followed for more than 2 years and the longest follow up was 8 years. Two kinds of thalamic lesion were seen after GKS. Volumetric analysis on MR imaging revealed that the larger lesion was 400 to 500 mm3 at the beginning and gradually decreased in size. The smaller lesion occupied approximately 200 mm3 and also shrank over several months. Eighty percent of the treated cases showed good results and no significant complications, with the tremor subsiding at 1 year (Type 1). Several cases deviated from this standard course in four different ways (Types 2–5). If tremor persisted, conventional stereotactic thalamotomy with microrecording was performed. During such operations, normal neuronal activity was recorded from the region adjacent to the GKS thalamotomy target. This was the region showing a high signal on MR imaging. The activity patterns included the rhythmical grouped discharge of tremor rhythm. Conclusions. Gamma thalamotomy for functional disorders is still under development, but because the results with careful target planning are satisfactory, there are grounds for increasing optimism.
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Chrastina, J., Z. Novak, M. Balaz, I. Riha et M. Bockova. « Subthalamic electrode implantation using the MicroDrive system and the importance of microrecording data ». Bratislava Medical Journal 114, no 06 (2013) : 311–16. http://dx.doi.org/10.4149/bll_2013_066.

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Bour, Lo J., M. Fiorella Contarino, Elisabeth M. J. Foncke, Rob M. A. de Bie, Pepijn van den Munckhof, Johannes D. Speelman et P. Richard Schuurman. « Long-term experience with intraoperative microrecording during DBS neurosurgery in STN and GPi ». Acta Neurochirurgica 152, no 12 (15 octobre 2010) : 2069–77. http://dx.doi.org/10.1007/s00701-010-0835-y.

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Fukaya, Chikashi, Koichiro Sumi, Toshiharu Otaka, Toshiki Obuchi, Toshikazu Kano, Kazutaka Kobayashi, Hideki Oshima, Takamitsu Yamamoto et Yoichi Katayama. « Nexframe Frameless Stereotaxy with Multitract Microrecording : Accuracy Evaluated by Frame-Based Stereotactic X-Ray ». Stereotactic and Functional Neurosurgery 88, no 3 (2010) : 163–68. http://dx.doi.org/10.1159/000313868.

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Hirato, M., K. Watanabe, A. Takahashi, N. Hayase, H. K. Inoue et C. Ohye. « Use of a Frameless Isocentric Stereotactic System (NEURO-SAT) Combined with the Intraoperative Microrecording ». Stereotactic and Functional Neurosurgery 63, no 1-4 (1994) : 80–83. http://dx.doi.org/10.1159/000100297.

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Mandat, T., M. Tutaj, H. Koziara, P. Nauman, W. Bonicki et R. Rola. « 2.302 MICRORECORDING OPTIMIZES FINAL ELECTRODE PLACEMENT FOR SUBTHALAMIC DEEP BRAIN STIMULATION IN PARKINSON'S DISEASE ». Parkinsonism & ; Related Disorders 18 (janvier 2012) : S141. http://dx.doi.org/10.1016/s1353-8020(11)70625-3.

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Verhagen, R., P. R. Schuurman, P. van den Munckhof, M. F. Contarino, R. M. A. de Bie et L. J. Bour. « EP 79. Comparative study of microrecording-based STN location and MRI-based STN location ». Clinical Neurophysiology 127, no 9 (septembre 2016) : e208-e209. http://dx.doi.org/10.1016/j.clinph.2016.05.261.

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Zibetti, Maurizio, Alberto Romagnolo, Emanuela Crobeddu, Riccardo Fornaro, Aristide Merola, Mario Giorgio Rizzone, Leonardo Lopiano et Michele Lanotte. « Does Intraoperative Microrecording Really Increase the Risk of Hemorrhagic Complications in Deep Brain Stimulation ? » Brain Stimulation 7, no 6 (novembre 2014) : 911–12. http://dx.doi.org/10.1016/j.brs.2014.07.037.

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Miyagi, Yasushi, Fumio Shima, Katsuya Ishido, Masashi Moriguchi et Kazufumi Kamikaseda. « Posteroventral pallidotomy for midbrain tremor after a pontine hemorrhage ». Journal of Neurosurgery 91, no 5 (novembre 1999) : 885–88. http://dx.doi.org/10.3171/jns.1999.91.5.0885.

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✓ This 49-year-old man gradually developed a disabling action tremor in the proximal right upper extremity 8 months after suffering a pontine tegmental hemorrhage. The intraoperative microrecording in the nucleus ventralis intermedius (VIM) of the left thalamus revealed tremor-synchronous grouped discharges with a vigorous (2.7 Hz) action tremor predominantly in the shoulder and upper arm. High frequency electrical stimulation in the VIM did not affect the tremor. A posteroventral pallidotomy (PVP) was performed and resulted in the successful alleviation of all tremor activity. Posteroventral pallidotomy is known to alleviate parkinsonian tremors, especially those occurring in the contralateral lower extremity, trunk, and proximal segment of the contralateral upper extremity. The authors consider the pallidoreticular pathway to be an important tremor-mediating pathway for the proximal segment of the upper extremities and believe it can be controlled more effectively by PVP than by VIM thalamotomy, as demonstrated by the PVP-induced resolution of the midbrain tremor observed in this case.
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Klempíř, Ondřej, Radim Krupička, Eduard Bakštein et Robert Jech. « Identification of Microrecording Artifacts with Wavelet Analysis and Convolutional Neural Network : An Image Recognition Approach ». Measurement Science Review 19, no 5 (1 octobre 2019) : 222–31. http://dx.doi.org/10.2478/msr-2019-0029.

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Abstract Deep brain stimulation (DBS) is an internationally accepted form of treatment option for selected patients with Parkinson’s disease and dystonia. Intraoperative extracellular microelectrode recordings (MER) are considered as the standard electrophysiological method for the precise positioning of the DBS electrode into the target brain structure. Pre-processing of MERs is a key phase in clinical analysis, with intraoperative microelectrode recordings being prone to several artifact groups (up to 25 %). The aim of this methodological article is to provide a convolutional neural network (CNN) processing pipeline for the detection of artifacts in an MER. We applied continuous wavelet transform (CWT) to generate an over-complete time–frequency representation. We demonstrated that when attempting to find artifacts in an MER, the new CNN + CWT provides a high level of accuracy (ACC = 88.1 %), identifies individual classes of artifacts (ACC = 75.3 %) and also offers artifact time onset detail, which can lead to a reduction in false positives/negatives. In summary, the presented methodology is capable of identifying and removing various artifacts in a comprehensive database of MER and represents a substantial improvement over the existing methodology. We believe that this approach will assist in the proposal of interesting clinical hypotheses and will have neurologically relevant effects.
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Bartoli, A., R. Tyrand, S. Momjian et C. Boex. « LP27 : In vivo human microstimulation and microrecording of a sclerotic hippocampus and a cortical dysplasia ». Clinical Neurophysiology 125 (juin 2014) : S152. http://dx.doi.org/10.1016/s1388-2457(14)50496-8.

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Bour, L., E. Foncke, M. F. Contarino, J. D. Speelman et R. Schuurman. « 3.208 Refinement of target position and optimizing position for test stimulation with microrecording during DBS neurosurgery ». Parkinsonism & ; Related Disorders 13 (janvier 2007) : S164. http://dx.doi.org/10.1016/s1353-8020(08)70846-0.

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Shima, Fumio. « WS-31-2 Microrecording of the neuronal activities in the globus pallidus during stereotactic pallidotomy for movement disorders ». Electroencephalography and Clinical Neurophysiology/Electromyography and Motor Control 97, no 4 (septembre 1995) : S56—S57. http://dx.doi.org/10.1016/0924-980x(95)92620-2.

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Li, Yan, Xueen Li, Jianxin Deng et Jun Zhou. « Brain Tissue Responses to Guide Cannula Insertion and Replacement of a Microrecording Electrode with a Definitive DBS Electrode ». Journal of Medical and Biological Engineering 38, no 4 (26 septembre 2017) : 573–86. http://dx.doi.org/10.1007/s40846-017-0328-z.

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Rama Raju, Venkateshwarla. « Prediction of subthalamic nucleus neural tissue dimensions using high compactness microrecording recording system in Parkinson‘s with deep brain stimulation ». IP Indian Journal of Neurosciences 7, no 1 (15 mars 2021) : 67–75. http://dx.doi.org/10.18231/j.ijn.2021.010.

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Duque, P., O. Mateo, F. Ruiz, J. G. de Viloria, A. Contreras et F. Grandas. « Intraoperative microrecording under general anaesthesia with bispectral analysis monitoring in a case of deep brain stimulation surgery for Parkinsons disease ». European Journal of Neurology 15, no 8 (août 2008) : e76-e77. http://dx.doi.org/10.1111/j.1468-1331.2008.02166.x.

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Hirato, Masafumi, Akio Takahashi, Katsushige Watanabe et Tomio Sasaki. « Dynamic studies on the thalamocortical relation involved in tremor and voluntary movement in Parkinson's disease using PET and depth microrecording ». International Congress Series 1232 (avril 2002) : 561–65. http://dx.doi.org/10.1016/s0531-5131(01)00703-8.

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Servello, Domenico, Marco Sassi, Claudio Pacchetti, Francesca Mancini, Maddalena Gaeta, Cristian Ricci, Claudia Menghetti et Mauro Porta. « Hemorrhagic and Repositioning Risk Factors Related to Intraoperative Multitrack Microrecording on a Large Series of Patients Treated for Deep Brain Stimulation ». Neurosurgery Quarterly 21, no 3 (août 2011) : 194–98. http://dx.doi.org/10.1097/wnq.0b013e318218dc41.

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Hertel, Frank, Mark Züchner, Inge Weimar, Peter Gemmar, Bernhard Noll, Martin Bettag et Christian Decker. « IMPLANTATION OF ELECTRODES FORDEEP BRAIN STIMULATION OF THE SUBTHALAMIC NUCLEUS IN ADVANCED PARKINSON'S DISEASE WITH THE AID OF INTRAOPERATIVE MICRORECORDING UNDERGENERAL ANESTHESIA ». Neurosurgery 59, no 5 (1 novembre 2006) : E1138. http://dx.doi.org/10.1227/01.neu.0000245603.77075.55.

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Abstract OBJECTIVE Deep brain stimulation (DBS) is widely accepted in the treatment of advanced Parkinson's disease (PD) and other movement disorders. The standard implantation procedure is performed under local anesthesia (LA). Certain groups of patients may not be eligible for surgery under LA because of clinical reasons, such as massive fear, reduced cooperativity, or coughing attacks. Microrecording (MER) has been shown to be helpful in DBS surgery. The purpose of this study was to evaluate the feasibility of MERfor DBS surgery under general anesthesia (GA) and to compare the data of intraoperative MERas well as the clinical data with that of the current literature of patients undergoing operation under LA. CLINICAL PRESENTATION The data of nine patients with advanced PD (mean Hoehn and Yahr status, 4.2) who were operated with subthalamic nucleus (STN) DBS under GA, owing to certain clinical circumstances ruling out DBS under LA, were retrospectively analyzed. All operations were performed under analgosedation with propofol or remifentanil and intraoperative MER. For MER, remifentanil was ceased completely and propofol was lowered as far as possible. INTERVENTION The STN could be identified intraoperatively in all patients with MER. The typical bursting pattern was identified, whereas a widening of the baseline noise could not be as adequately detected as in patients under LA. The daily off phases of the patients were reduced from 50 to 17%, whereas the Unified Parkinson's Disease Rating Scale III score was reduced from 43 (preoperative, medication off) to 19 (stimulation on, medication off) and 12 (stimulation on, medication on). Two patients showed a transient neuropsychological deterioration after surgery, but both also had preexisting episodes of disorientation. One implantable pulse generator infection was noticed. No further significant clinical complications were observed. CONCLUSION STN surgery for advanced PD with MERguidance is possible with good clinical results under GA. Intraoperative MERof the STN region can be performed under GA with a special anesthesiological protocol. In this setting, the typical STN bursting pattern can be identified, whereas the typical widening of the background noise baseline while entering the STN region is obviously absent. This technique may enlarge the group of patients eligible for STN surgery. Although the clinical improvements and parameter settings in this study were within the range of the current literature, further randomized controlled studies are necessary to compare the results of STN DBS under GA and LA, respectively.
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Ohye, Chihiro, Tohru Shibazaki et Sumito Sato. « Gamma knife thalamotomy for movement disorders : evaluation of the thalamic lesion and clinical results ». Journal of Neurosurgery 102, Special_Supplement (janvier 2005) : 234–40. http://dx.doi.org/10.3171/sup.2005.102.s_supplement.0234.

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Object. The authors studied the effects of gamma knife thalamotomy (GKT) on Parkinson disease-related tremor and essential tremor before and after reloading of radioactive cobalt. Methods. Based on experience in stereotactic thalamotomy aided by depth microrecording, the target was located at the lateral border of the thalamic ventralis intermedius nucleus (VIM). For more precise targeting, the percentage representation of the thalamic VIM in relation to the entire thalamic length is useful. The location of the target was determined on magnetic resonance (MR) imaging and computerized tomography scanning. A maximum dose of 130 Gy was delivered to the target by using a single isocenter with the 4-mm collimator. In more recent cases, a systematic follow-up examination was performed at 3, 6, 12, 18, and 24 months after GKT. Since 1993, the authors have treated 70 patients with PD. Throughout the series the same dosimetric technique has been used. The course after GKT was compared between the 25 cases with PD treated before reloading and the 35 cases treated after reloading. In the majority (80–85%) treated after reloading, tremor and rigidity were reduced around 6 months after GKT. In the cases treated before reloading this effect took approximately 1 year. The thalamic reaction on MR imaging showed the same two lesion types in both series: a restricted and a diffuse. After reloading the restricted lesion was more frequent and the lesion volume was smaller. Conclusions. The shorter delay in clinical improvement and smaller lesion size may be related to an increased radiation dose.
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