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Добірка наукової літератури з теми "Trigeminal complex"

Автор: Grafiati

Опубліковано: 24 лютого 2024

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Статті в журналах з теми "Trigeminal complex"

Brown, Jeffrey A. "The Trigeminal Complex." Neurosurgery Clinics of North America 8, no. 1 (1997): 1–10. http://dx.doi.org/10.1016/s1042-3680(18)30333-4.

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Mehnert, Jan, Hauke Basedau, Lisa-Marie Sturm, Trine Nielsen, Rigmor Højland Jensen, and Arne May. "Functional brainstem representations of the human trigeminal cervical complex." Cephalalgia 43, no. 5 (2023): 033310242311748. http://dx.doi.org/10.1177/03331024231174862.

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Background The human in-vivo functional somatotopy of the three branches of the trigeminal (V1, V2, V3) and greater occipital nerve in brainstem and also in thalamus and insula is still not well understood. Methods After preregistration (clinicaltrials.gov: NCT03999060), we mapped the functional representations of this trigemino-cervical complex non-invasively in 87 humans using high-resolution protocols for functional magnetic resonance imaging during painful electrical stimulation in two separate experiments. The imaging protocol and analysis was optimized for the lower brainstem and upper spinal cord, to identify activation of the spinal trigeminal nuclei. The stimulation protocol involved four electrodes which were positioned on the left side according to the three branches of the trigeminal nerve and the greater occipital nerve. The stimulation site was randomized and each site was repeated 10 times per session. The participants partook in three sessions resulting in 30 trials per stimulation site. Results We show a large overlap of peripheral dermatomes on brainstem representations and a somatotopic arrangement of the three branches of the trigeminal nerve along the perioral-periauricular axis and for the greater occipital nerve in brainstem below pons, as well as in thalamus, insula and cerebellum. The co-localization of greater occipital nerve with V1 along the lower part of brainstem is of particular interest since some headache patients profit from an anesthetic block of the greater occipital nerve. Conclusion Our data provide anatomical evidence for a functional inter-inhibitory network between the trigeminal branches and greater occipital nerve in healthy humans as postulated in animal work. We further show that functional trigeminal representations intermingle perioral and periauricular facial dermatomes with individual branches of the trigeminal nerve in an onion shaped manner and overlap in a typical within-body-part somatotopic arrangement. Trial registration: clinicaltrials.gov: NCT03999060

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BALYAZINA, E. V., T. A. ISAKHANOVA, and N. A. ALEKSEEVA. "CLASSICAL TRIGEMINAL NEURALGIA COMPLEX THERAPY." Kubanskij nauchnyj medicinskij vestnik 1, no. 2 (2017): 21–24. http://dx.doi.org/10.25207/1608-6228-2017-2-21-24.

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Clement, M. E., and R. B. McCall. "Characterization of midline medulla role in the trigeminal depressor response." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 256, no. 5 (1989): R1111—R1120. http://dx.doi.org/10.1152/ajpregu.1989.256.5.r1111.

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The purpose of the present investigation was to determine the role of the midline medulla in mediating the trigeminal depressor response. Previously we found that lesions of the midline medulla abolished the decrease in blood pressure resulting from electrical stimulation of the spinal trigeminal complex. Electrical stimulation (5 Hz) of the spinal trigeminal tract elicited a decrease in arterial blood pressure that was associated with an inhibition of sympathetic nerve activity recorded from the inferior cardiac nerve of anesthetized cats. The effect of single shocks applied to the trigeminal complex on sympathetic activity was determined using computer-averaging techniques. Single shock stimulation consistently elicited an excitation of sympathetic activity that was followed by an inhibition of sympathetic nerve discharge. The gamma-aminobutyric acid antagonist picrotoxin blocked the depressor response elicited by electrical stimulation of the midline medulla but not by stimulation of the spinal trigeminal complex. Extracellular recordings of the discharges of midline medullary neurons were made to determine the effects of trigeminal stimulation on sympathoinhibitory, sympathoexcitatory, and serotonin neurons. Sympathoinhibitory and sympathoexcitatory neurons were identified by the relationship between unitary discharges and sympathetic nerve activity and by their response to baroreceptor reflex activation. Serotonin (5-HT) neurons were identified using criteria previously developed in our laboratory. These included 1) a slow regular discharge rate, 2) sensitivity to the inhibitory action of the 5-HT1A agonist 8-OH 8-hydroxy-2-(di-n-propylamino)tetralin, 3) failure to respond to baroreceptor reflex activation, and 4) the discharges of the 5-HT neurons were not related to sympathetic activity. Stimulation of the spinal trigeminal complex typically inhibited the discharges of sympathoinhibitory neurons. In contrast, stimulation of the trigeminal complex consistently excited both sympathoexcitatory and 5-HT neurons. These results are discussed in relationship to the role of the midline medulla in mediating the trigeminal depressor response.

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Chávez, Gabriela-del-Rocío Chávez, Antonio A. F. De Salles, Timothy D. Solberg, Alessandra Pedroso, Dulce Espinoza, and Pablo Villablanca. "Three-dimensional Fast Imaging Employing Steady-state Acquisition Magnetic Resonance Imaging for Stereotactic Radiosurgery of Trigeminal Neuralgia." Neurosurgery 56, no. 3 (2005): E628. http://dx.doi.org/10.1227/01.neu.0000154709.44776.50.

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Abstract OBJECTIVE: The aim of this study was to demonstrate the use and applications of the three-dimensional fast imaging employing steady-state acquisition (3-D-FIESTA) magnetic resonance imaging sequence in targeting and planning for stereotactic radiosurgery of trigeminal neuralgia. METHODS: A 3-D-FIESTA sequence for visualization of cranial nerves in the cranial base was added to the routine magnetic resonance imaging scan to enhance the treatment planning for trigeminal neuralgia. T1-weighted images, 1 mm thick, were directly compared with the FIESTA sequence for the exact visualization of the trigeminal entry zone and surrounding vasculature. The target accuracy was evaluated by image fusion of computed tomographic and magnetic resonance imaging scans. The anatomy visualized with the FIESTA sequence was validated by direct inspection of the gross anatomic specimens of the trigeminal complex. RESULTS: A total of 15 consecutive patients, 10 women and 5 men, underwent radiosurgery for essential trigeminal neuralgia between April and July, 2003. The mean age of the patients was 65.2 years (range, 24–83 yr). Nine patients had right-sided symptoms. Four patients had had previous surgery (two microvascular decompression, one percutaneous rhizotomy, and one radiofrequency thermocoagulation). The 3-D-FIESTA sequence successfully demonstrated the trigeminal complex (root entry zone, trigeminal ganglion, rootlets, and vasculature) in 14 patients (93.33%). The 3-D-FIESTA sequence also allowed visualization of the branches of the trigeminal nerve inside Meckel's cavity. This exact visualization correlated precisely with the anatomic specimens. In one patient (6.66%), it was not possible to demonstrate the related vasculature. However, the other structures were clearly visualized. CONCLUSION: The 3-D-FIESTA sequence is used in this study for demonstration of the exact anatomy of the trigeminal complex for the purpose of radiosurgical planning and treatment of trigeminal neuralgia. With such imaging techniques, radiosurgical targeting of specific trigeminal nerve branches may be feasible. It has not been possible previously to target individual branches of the trigeminal nerve.

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Visconti, Ciro, Leone Leone, Michele Mario Zarrelli, and Alfredo Del Gaudio. "Cervical Spinal Dorsal Root Stimulation in Trigeminal Neuralgia." Pain Medicine Case Reports 5, no. 8 (2021): 379–83. http://dx.doi.org/10.36076/pmcr.2021.5.8.

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BACKGROUND: The treatment of trigeminal neuralgia is a challenge especially for cases refractory to the common standard of care. Neurostimulation for pain relief has been used over the years with different targets and modalities. Few reports exist about the stimulation of high cervical spinal dorsal roots to treat trigeminal pain. CASE REPORT: We report a case of a refractory secondary trigeminal neuralgia that was progressively resistant to various treatments. A trial for upper cervical spinal dorsal root stimulation provided immediate good facial pain relief, evoking paresthesias only in the cervical dermatomes. Positive results were obtained over 3 years with reduction of pain, drugs, and improvement in quality of life. DISCUSSION: Neurostimulation of the high cervical spinal dorsal roots with the activation of the trigeminocervical complex may be an effective and safe treatment for refractory trigeminal neuralgia. KEY WORDS: Spinal dorsal root neurostimulation, trigeminal neuralgia, trigeminocervical complex

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Gaydhanker, Anuradha Prasanna, and Prasanna Shravan Gaydhanker. "A study on trigeminal nerve: Does superior cerebellar artery causes trigeminal neuralgia." Indian Journal of Clinical Anatomy and Physiology 9, no. 3 (2022): 174–78. http://dx.doi.org/10.18231/j.ijcap.2022.037.

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Our brain is the most complex organ in our body which conducts various complex functions and this level of complexity is operated by different structures of the brain. The complexity of relaying information between brain and different parts of the body is conducted by 12 pairs of cranial nerves. Out of 12 pairs of cranial nerves, the most complex and largest nerve is know as trigeminal nerve which is responsible for sensation of face and motor functions such as biting and chewing. Sometimes due to offendation of this nerve typically by Superior Cerebellar Artery leads to most excruciating painful disorder humanity have ever witnessed.: A systemic self-study was planned to determine and review with proper enlightenment on the existing facts to find the root sources of trigeminal neuralgia.This article discussed and focused on the exact cause of trigeminal neuralgia it’s association with Superior Cerebellar Artery along with descriptive analysis on the available treatments for this disorder. We concluded with the fact that based on our thorough review and analysis Superior Cerebellar Artery is the main artery which typically causes world’s most excruciating painful Suicide Disease.

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Igawa, Kaori, Hideki Funahashi, Yu Miyahara, et al. "Distribution of hemokinin-1 in the rat trigeminal ganglion and trigeminal sensory nuclear complex." Archives of Oral Biology 79 (July 2017): 62–69. http://dx.doi.org/10.1016/j.archoralbio.2017.03.004.

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Jones, Lauren M., SooHyun Lee, Jason C. Trageser, Daniel J. Simons, and Asaf Keller. "Precise Temporal Responses in Whisker Trigeminal Neurons." Journal of Neurophysiology 92, no. 1 (2004): 665–68. http://dx.doi.org/10.1152/jn.00031.2004.

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The ability of rats using their whiskers to perform fine tactile discrimination rivals that of humans using their fingertips. Rats must perform these discriminations rapidly and accurately while palpating the environment with their whiskers. This suggests that whisker-derived inputs produce a robust and reliable code, capable of capturing complex, high-frequency information. The first neural representation of whisker-derived stimulus information is in primary afferent neurons of the trigeminal ganglion. Here we demonstrate that there is a continuum of direction-dependent response profiles in trigeminal neurons and provide the first quantitative analysis of the encoding of complex stimuli by these neurons. We show that all classes of trigeminal ganglion neurons respond with highly reproducible temporal spike patterns to transient stimuli. Such a robust coding mechanism may allow rapid perception of complex tactile features.

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Rigoard, Philippe, Maxime Billot, Maarten Moens, et al. "Evaluation of External Trigeminal Nerve Stimulation to Prevent Cerebral Vasospasm after Subarachnoid Hemorrhage Due to Aneurysmal Rupture: A Randomized, Double-Blind Proof-of-Concept Pilot Trial (TRIVASOSTIM Study)." International Journal of Environmental Research and Public Health 20, no. 10 (2023): 5836. http://dx.doi.org/10.3390/ijerph20105836.

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Cerebral vasospasm remains the most frequent and devastating complication after subarachnoid aneurysmal hemorrhage because of secondary cerebral ischemia and its sequelae. The underlying pathophysiology involves vasodilator peptide release (such as CGRP) and nitric oxide depletion at the level of the precapillary sphincters of the cerebral (internal carotid artery network) and dural (external carotid artery network) arteries, which are both innervated by craniofacial autonomic afferents and tightly connected to the trigeminal nerve and trigemino-cervical nucleus complex. We hypothesized that trigeminal nerve modulation could influence the cerebral flow of this vascular network through a sympatholytic effect and decrease the occurrence of vasospasm and its consequences. We conducted a prospective double-blind, randomized controlled pilot trial to compare the effect of 10 days of transcutaneous electrical trigeminal nerve stimulation vs. sham stimulation on cerebral infarction occurrence at 3 months. Sixty patients treated for aneurysmal SAH (World Federation of Neurosurgical Societies scale between 1 and 4) were included. We compared the radiological incidence of delayed cerebral ischemia (DCI) on magnetic resonance imaging (MRI) at 3 months in moderate and severe vasospasm patients receiving trigeminal nerve stimulation (TNS group) vs. sham stimulation (sham group). Our primary endpoint (the infarction rate at the 3-month follow-up) did not significantly differ between the two groups (p = 0.99). Vasospasm-related infarctions were present in seven patients (23%) in the TNS group and eight patients (27%) in the sham group. Ultimately, we were not able to show that TNS can decrease the rate of cerebral infarction secondary to vasospasm occurrence. As a result, it would be premature to promote trigeminal system neurostimulation in this context. This concept should be the subject of further research.

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