Journal articles: 'Auditory Brain Responses'

1

Kayed, Khalil, and Reidar Kloster. "Brain Stem Auditory Evoked Responses." Acta Neurologica Scandinavica 62, no. 1 (January 29, 2009): 64. http://dx.doi.org/10.1111/j.1600-0404.1980.tb03005.x.

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Busaba, Nicolas Y., and Steven D. Rauch. "Significance of Auditory Brain Stem Response and Gadolinium-Enhanced Magnetic Resonance Imaging for Idiopathic Sudden Sensorineural Hearing Loss." Otolaryngology–Head and Neck Surgery 113, no. 3 (September 1995): 271–75. http://dx.doi.org/10.1016/s0194-5998(95)70117-6.

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Previous studies tried to correlate prognosis and response to oral corticosteroids in patients with idiopathic sudden sensorineural hearing loss to such factors as the age of the patient, presence of vertigo, shape of the audiogram, or severity of the hearing loss. However, temporal bone histopathologic evidence shows that idiopathic sudden sensorineural hearing loss may be caused by cochleitis or cochlear nerve neuritis. Herein we report results of a retrospective study of 96 consecutive patients with idiopathic sudden sensorineural hearing loss who were evaluated with auditory brain stem responses and gadolinium-enhanced magnetic resonance imaging. Results of the auditory brain stem response and magnetic resonance imaging were correlated with hearing outcome. Follow-up was available for 65 patients: 14 with abnormal and 51 with normal auditory brain stem responses. The overall rate of hearing recovery or improvement was 65% in the normal auditory brain stem response group compared with 43% in the abnormal auditory brain stem response group ( p = 0.07). Among the 38 patients treated with a tapering course of oral corticosteroids, the recovery or improvement rate was 83% for those with normal auditory brain stem responses and 56% for those with abnormal auditory brain stem responses ( p < 0.05). Of the 27 patients who did not receive steroid therapy, the improvement rate was 41% in those with normal auditory brain stem responses and 20% in those with abnormal auditory brain stem responses ( p = 0.09). Magnetic resonance imaging with gadolinium was obtained on all 14 patients with abnormal auditory brain stem responses but on none with normal auditory brain stem responses. Only 1 magnetic resonance image of 14 demonstrated an abnormality, showing a high signal intensity in the distal internal auditory canal; this resolved 6 weeks later on a follow-up magnetic resonance image. We conclude that idiopathic sudden sensorineural hearing loss patients with abnormal auditory brain stem responses have poorer hearing prognoses compared with those patients with normal auditory brain stem responses, irrespective of treatment. Idiopathic sudden sensorineural hearing loss patients with abnormal auditory brain stem responses may have cochlear neuritis causing their hearing loss or may have a more extensive involvement of their auditory system, and this “lesion” may have a lower spontaneous recovery rate and less response to therapy. Magnetic resonance imaging with gadolinium may show abnormal signal intensities along the course of the eighth nerve in patients with idiopathic sudden sensorineural hearing loss, but this is infrequent, and its prognostic implications are not clear.

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Rosenhall, Ulf, Viviann Nordin, Krister Brantberg, and Christopher Gillberg. "Autism and Auditory Brain Stem Responses." Ear and Hearing 24, no. 3 (June 2003): 206–14. http://dx.doi.org/10.1097/01.aud.0000069326.11466.7e.

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Creel, Donnell J., John B. Holds, and Richard L. Anderson. "Auditory brain-stem responses in blepharospasm." Electroencephalography and Clinical Neurophysiology 86, no. 2 (February 1993): 138–40. http://dx.doi.org/10.1016/0013-4694(93)90086-b.

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ARAO, HARUMI, and HIDETO NIWA. "Auditory brain stem responses in Down's syndrome." Nippon Jibiinkoka Gakkai Kaiho 94, no. 11 (1991): 1673–82. http://dx.doi.org/10.3950/jibiinkoka.94.11_1673.

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Newman, Thomas B. "Neonatal jaundice and brain-stem auditory responses." Journal of Pediatrics 118, no. 4 (April 1991): 653. http://dx.doi.org/10.1016/s0022-3476(05)83398-0.

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HARELL, MOSHE, MOSHE ENGLENDER, ROBERT KIMHI, MYRIAM DEMER, and MOSHE ZOHAR. "AUDITORY BRAIN STEM RESPONSES IN SCHIZOPHRENIC PATIENTS." Laryngoscope 96, no. 8 (August 1986): 908???910. http://dx.doi.org/10.1288/00005537-198608000-00015.

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Wilson, Michael J., Denise Kelly-Ballweber, and Robert A. Dobie. "Binaural Interaction in Auditory Brain Stem Responses." Ear and Hearing 6, no. 2 (March 1985): 80–88. http://dx.doi.org/10.1097/00003446-198503000-00004.

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Schwartz, Daniel M., Robert E. Pratt, and Jamie A. Schwartz. "Auditory Brain Stem Responses in Preterm Infants." Ear and Hearing 10, no. 1 (February 1989): 14–22. http://dx.doi.org/10.1097/00003446-198902000-00003.

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Özdamar, Ö., and T. Kalayci. "Median Averaging of Auditory Brain Stem Responses." Ear and Hearing 20, no. 3 (June 1999): 253–64. http://dx.doi.org/10.1097/00003446-199906000-00007.

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Despland, P. A., C. Gander, and S. Winstanley. "Auditory brain-stem responses in perinatal disorders." Electroencephalography and Clinical Neurophysiology 75 (January 1990): S36. http://dx.doi.org/10.1016/0013-4694(90)91846-h.

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Wada, S., C. Kadoya, E. Urasaki, and S. Matsuoka. "Auditory brain-stem responses in newborn infants." Electroencephalography and Clinical Neurophysiology 75 (January 1990): S159—S160. http://dx.doi.org/10.1016/0013-4694(90)92300-l.

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Harell, Moshe, Moshe Englender, Robert Kimhi, Myriam Demer, and Moshe Zohar. "Auditory Brain Stem Responses in Schizophrenic Patients." Laryngoscope 96, no. 8 (August 1986): 908–10. http://dx.doi.org/10.1002/lary.1986.96.8.908.

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14

Lindstrom, L., I. Klockhoff, A. Svedberg, and K. Bergstrom. "Abnormal Auditory Brain-stem Responses in Hallucinating Schizophrenic Patients." British Journal of Psychiatry 151, no. 1 (July 1987): 9–14. http://dx.doi.org/10.1192/bjp.151.1.9.

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Abnormal auditory brain-stem responses (ABRs) were recorded in 10 out of 20 schizophrenic in-patients. The response abnormalities did not show any correlation to the degree of psychopathology, sub-group of schizophrenia, age, sex, or cerebral ventricular enlargement. Nor was there any correlation to previous neuroleptic treatment: a pathological ABR was recorded in 5 of the 8 patients who had never received such medication. A statistically significant relationship was found between ABR pathology and auditory hallucinations: 9 of the 11 patients who admitted having hallucinations exhibited brain-stem response abnormality, whereas ABR abnormality was recorded in only 1 of the 9 patients who denied having hallucinations. The data imply that brain-stem dysfunction is involved in the psychopathology of schizophrenia, and that interference with the auditory pathways in the brain-stem may induce auditory hallucinations in schizophrenic patients.

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15

Plessinger, M. A., and J. R. Woods. "Fetal auditory brain stem response: external and intrauterine auditory stimulation." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 250, no. 1 (January 1, 1986): R137—R141. http://dx.doi.org/10.1152/ajpregu.1986.250.1.r137.

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Singleton fetuses from five pregnant ewes of 120-129 days gestation (term = 145 days) were tested for fetal auditory brain stem responses (ABR) generated by earphones placed on the maternal abdomen and compared with ABRs generated by an earphone secured in the fetal lamb's ear. To conduct these studies a cesarean section was performed on the pregnant ewe at 105-110 days gestation in order to implant stainless steel electrodes in the fetal scalp and a hearing aid receiver in the fetal external ear canal. The fetus was returned to the uterus, and the pregnancy was allowed to continue. Comparison of the externally elicited fetal ABR with the internally elicited fetal ABR indicates similar response patterns with delayed peak latencies observed in ABR responses from external stimulation. This new method of generating fetal ABRs by an external sound source documents the neurological response of the fetal auditory end organ and the fetal brain stem in the pregnant nonstressed animal model and may have applications in developmental studies of the fetal auditory system.

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Martínez Fernández, Asunción, Miguel Ángel Alañón Fernández, Luis Félix Ayala Martínez, Ana Belén Álvarez Álvarez, María Teresa Miranda León, and Manuel Sainz Quevedo. "Comparative Study Between Auditory Steady-State Responses, Auditory Brain-Stem Responses, and Liminar Tonal Audiometry." Acta Otorrinolaringologica (English Edition) 58, no. 7 (January 2007): 290–95. http://dx.doi.org/10.1016/s2173-5735(07)70353-8.

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17

MIYAGIMA, KAYOKO, MASATO ISHIDA, and MICHIHIKO NOZUE. "Auditory brain stem responses of prematures in NICU." Nippon Jibiinkoka Gakkai Kaiho 88, no. 12 (1985): 1666–72. http://dx.doi.org/10.3950/jibiinkoka.88.1666.

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18

Chan, Y. W., J. G. McLeod, R. R. Tuck, and P. A. Feary. "Brain stem auditory evoked responses in chronic alcoholics." Journal of Neurology, Neurosurgery & Psychiatry 48, no. 11 (November 1, 1985): 1107–12. http://dx.doi.org/10.1136/jnnp.48.11.1107.

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19

Shalabi, Nesrien, Mohamed Abdel El-Salam, and Fatma Abbas. "Brain-stem auditory evoked responses in COPD patients." Egyptian Journal of Chest Diseases and Tuberculosis 61, no. 4 (October 2012): 313–21. http://dx.doi.org/10.1016/j.ejcdt.2012.08.001.

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20

Alho, K. "Involuntary auditory attention and event-related brain responses." International Journal of Psychophysiology 25, no. 1 (January 1997): 75. http://dx.doi.org/10.1016/s0167-8760(97)85554-7.

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21

Squires, Nancy, Christine Ollo, and Rebecca Jordan. "Auditory Brain Stem Responses in the Mentally Retarded." Ear and Hearing 7, no. 2 (April 1986): 83–92. http://dx.doi.org/10.1097/00003446-198604000-00006.

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22

Siddiqi, T. A., R. A. Meyer, J. R. Woods, and M. A. Plessinger. "Ultrasound Effects on Fetal Auditory Brain Stem Responses." Obstetric Anesthesia Digest 9, no. 2 (July 1989): 66. http://dx.doi.org/10.1097/00132582-198907000-00015.

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23

Marsh, Roger R., and Carol A. Knightly. "Auditory Brain Stem Responses Recorded With Uncushioned Earphones." American Journal of Audiology 1, no. 4 (November 1992): 63–65. http://dx.doi.org/10.1044/1059-0889.0104.63.

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Although the cushion is essential to accurate pure-tone audiometry with conventional earphones, it may interfere with the auditory brain stem response (ABR) testing of small infants because of its size and the risk of ear canal collapse. To determine the consequences of ABR testing with an uncushioned earphone, adults were tested with and without the cushion, and probe-tube sound measurements were made. Although removing the cushion results in substantial signal attenuation below 1 kHz, there is little effect on the click-elicited ABR.

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24

MATTOX, D. E. "Auditory Brain-stem Responses in Obstructive Sleep Apnea." Archives of Otolaryngology - Head and Neck Surgery 114, no. 6 (June 1, 1988): 609. http://dx.doi.org/10.1001/archotol.1988.01860180023002.

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25

Sun, Yue, Maria Giavazzi, Martine Adda-Decker, Leonardo S. Barbosa, Sid Kouider, Anne-Catherine Bachoud-Lévi, Charlotte Jacquemot, and Sharon Peperkamp. "Complex linguistic rules modulate early auditory brain responses." Brain and Language 149 (October 2015): 55–65. http://dx.doi.org/10.1016/j.bandl.2015.06.009.

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26

Karmel, Bernard Z., Judith M. Gardner, Rosario A. Zappulla, Catherine L. Magnano, and Edwin G. Brown. "Brain-stem auditory evoked responses as indicators of early brain insult." Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section 71, no. 6 (November 1988): 429–42. http://dx.doi.org/10.1016/0168-5597(88)90047-0.

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27

Chambers, H., R. Costa, N. Konyer, S. Nykamp, H. Dobson, N. Milgram, and R. Poma. "MRI measurement of the canine auditory pathways and relationship with brainstem auditory evoked responses." Veterinary and Comparative Orthopaedics and Traumatology 21, no. 03 (2008): 238–42. http://dx.doi.org/10.1055/s-0037-1617367.

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SummaryThe objective of this study was to determine direct measurements of auditory pathways by magnetic resonance imaging (MRI) during the growth period of healthy Beagles, and to discover how canine brainstem auditory evoked response (BAER) latencies vary in relation to these MRI measurements. Eighty healthy Beagles were tested at eight, 16 and 52 weeks of age (stages 1, 2, 3, respectively) with BAER and brain MRI. The BAER interpeak latency (IPL) II-V and brain MRI neural generators of BAER waves II and V were identified. A linear distance was calculated in millimeters in order to determine the approximate length of auditory pathways. Sensory nerve conduction velocity (SNCV) of the auditory pathway between peak II and peak V was calculated for each group. A significant difference was observed between brain MRI distances among the three stages. Mean BAER IPL II-V were not significantly different between the three stages. The progressive growth of the skull and brain witnessed by the progressive increased distance of the MRI auditory pathways between peak II and peak V was not associated with a progressive maturation of the BAER IPL II-V. The SNCV of the auditory pathway between peak II and peak V was 6.14 m/sec for group 1; 6.76 m/sec for group 2; and 7.32 m/sec for group 3.

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Ciaramitaro, Vivian M., Giedrius T. Buračas, and Geoffrey M. Boynton. "Spatial and Cross-Modal Attention Alter Responses to Unattended Sensory Information in Early Visual and Auditory Human Cortex." Journal of Neurophysiology 98, no. 4 (October 2007): 2399–413. http://dx.doi.org/10.1152/jn.00580.2007.

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Attending to a visual or auditory stimulus often requires irrelevant information to be filtered out, both within the modality attended and in other modalities. For example, attentively listening to a phone conversation can diminish our ability to detect visual events. We used functional magnetic resonance imaging (fMRI) to examine brain responses to visual and auditory stimuli while subjects attended visual or auditory information. Although early cortical areas are traditionally considered unimodal, we found that brain responses to the same ignored information depended on the modality attended. In early visual area V1, responses to ignored visual stimuli were weaker when attending to another visual stimulus, compared with attending to an auditory stimulus. The opposite was true in more central visual area MT+, where responses to ignored visual stimuli were weaker when attending to an auditory stimulus. Furthermore, fMRI responses to the same ignored visual information depended on the location of the auditory stimulus, with stronger responses when the attended auditory stimulus shared the same side of space as the ignored visual stimulus. In early auditory cortex, responses to ignored auditory stimuli were weaker when attending a visual stimulus. A simple parameterization of our data can describe the effects of redirecting attention across space within the same modality (spatial attention) or across modalities (cross-modal attention), and the influence of spatial attention across modalities (cross-modal spatial attention). Our results suggest that the representation of unattended information depends on whether attention is directed to another stimulus in the same modality or the same region of space.

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Kühnis, Jürg, Stefan Elmer, and Lutz Jäncke. "Auditory Evoked Responses in Musicians during Passive Vowel Listening Are Modulated by Functional Connectivity between Bilateral Auditory-related Brain Regions." Journal of Cognitive Neuroscience 26, no. 12 (December 2014): 2750–61. http://dx.doi.org/10.1162/jocn_a_00674.

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Currently, there is striking evidence showing that professional musical training can substantially alter the response properties of auditory-related cortical fields. Such plastic changes have previously been shown not only to abet the processing of musical sounds, but likewise spectral and temporal aspects of speech. Therefore, here we used the EEG technique and measured a sample of musicians and nonmusicians while the participants were passively exposed to artificial vowels in the context of an oddball paradigm. Thereby, we evaluated whether increased intracerebral functional connectivity between bilateral auditory-related brain regions may promote sensory specialization in musicians, as reflected by altered cortical N1 and P2 responses. This assumption builds on the reasoning that sensory specialization is dependent, at least in part, on the amount of synchronization between the two auditory-related cortices. Results clearly revealed that auditory-evoked N1 responses were shaped by musical expertise. In addition, in line with our reasoning musicians showed an overall increased intracerebral functional connectivity (as indexed by lagged phase synchronization) in theta, alpha, and beta bands. Finally, within-group correlative analyses indicated a relationship between intracerebral beta band connectivity and cortical N1 responses, however only within the musicians' group. Taken together, we provide first electrophysiological evidence for a relationship between musical expertise, auditory-evoked brain responses, and intracerebral functional connectivity among auditory-related brain regions.

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Welkoborsky, H. J., R. G. Amedee, A. Elkhatieb, and W. J. Mann. "Auditory-evoked brain-stem responses and auditory disorders in patients with Bell's palsy." European Archives of Oto-rhino-laryngology 248, no. 7 (October 1991): 417–19. http://dx.doi.org/10.1007/bf01463567.

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Finoia, Paola, Daniel J. Mitchell, Olaf Hauk, Christian Beste, Vittorio Pizzella, and John Duncan. "Concurrent brain responses to separate auditory and visual targets." Journal of Neurophysiology 114, no. 2 (August 2015): 1239–47. http://dx.doi.org/10.1152/jn.01050.2014.

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In the attentional blink, a target event (T1) strongly interferes with perception of a second target (T2) presented within a few hundred milliseconds. Concurrently, the brain's electromagnetic response to the second target is suppressed, especially a late negative-positive EEG complex including the traditional P3 wave. An influential theory proposes that conscious perception requires access to a distributed, frontoparietal global workspace, explaining the attentional blink by strong mutual inhibition between concurrent workspace representations. Often, however, the attentional blink is reduced or eliminated for targets in different sensory modalities, suggesting a limit to such global inhibition. Using functional magnetic resonance imaging, we confirm that visual and auditory targets produce similar, distributed patterns of frontoparietal activity. In an attentional blink EEG/MEG design, however, an auditory T1 and visual T2 are identified without mutual interference, with largely preserved electromagnetic responses to T2. The results suggest parallel brain responses to target events in different sensory modalities.

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Provenzi, Livio, Johanna Lindstedt, Kris De Coen, Linda Gasparini, Denis Peruzzo, Serena Grumi, Filippo Arrigoni, and Sari Ahlqvist-Björkroth. "The Paternal Brain in Action: A Review of Human Fathers’ fMRI Brain Responses to Child-Related Stimuli." Brain Sciences 11, no. 6 (June 20, 2021): 816. http://dx.doi.org/10.3390/brainsci11060816.

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As fathers are increasingly involved in childcare, understanding the neurological underpinnings of fathering has become a key research issue in developmental psychobiology research. This systematic review specifically focused on (1) highlighting methodological issues of paternal brain research using functional magnetic resonance imaging (fMRI) and (2) summarizing findings related to paternal brain responses to auditory and visual infant stimuli. Sixteen papers were included from 157 retrieved records. Sample characteristics (e.g., fathers’ and infant’s age, number of kids, and time spent caregiving), neuroimaging information (e.g., technique, task, stimuli, and processing), and main findings were synthesized by two independent authors. Most of the reviewed works used different stimuli and tasks to test fathers’ responses to child visual and/or auditory stimuli. Pre-processing and first-level analyses were performed with standard pipelines. Greater heterogeneity emerged in second-level analyses. Three main cortical networks (mentalization, embodied simulation, and emotion regulation) and a subcortical network emerged linked with fathers’ responses to infants’ stimuli, but additional areas (e.g., frontal gyrus, posterior cingulate cortex) were also responsive to infants’ visual or auditory stimuli. This review suggests that a distributed and complex brain network may be involved in facilitating fathers’ sensitivity and responses to infant-related stimuli. Nonetheless, specific methodological caveats, the exploratory nature of large parts of the literature to date, and the presence of heterogeneous tasks and measures also demonstrate that systematic improvements in study designs are needed to further advance the field.

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PAQUEREAU, J., J. C. MEURICE, J. P. NEAU, P. INGRAND, and F. PATTE. "Auditory brain-stem responses (ABRs) in sleep respiratory disorders." European Journal of Clinical Investigation 24, no. 3 (March 1994): 156–60. http://dx.doi.org/10.1111/j.1365-2362.1994.tb00981.x.

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Griskova-Bulanova, Inga, Kastytis Dapsys, Valentinas Maciulis, and Sidse M. Arnfred. "Closed eyes condition increases auditory brain responses in schizophrenia." Psychiatry Research: Neuroimaging 211, no. 2 (February 2013): 183–85. http://dx.doi.org/10.1016/j.pscychresns.2012.04.004.

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35

Rudell, Alan P. "A fiber tract model of auditory brain-stem responses." Electroencephalography and Clinical Neurophysiology 67, no. 1 (July 1987): 53–62. http://dx.doi.org/10.1016/0013-4694(87)90163-5.

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RICHMOND, K. H. "Brain-Stem Auditory-Evoked Responses in High-Risk Infants." Archives of Otolaryngology - Head and Neck Surgery 112, no. 2 (February 1, 1986): 135. http://dx.doi.org/10.1001/archotol.1986.03780020015005.

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Deka, R. C., S. K. Kacker, and P. N. Tandon. "Auditory Brain-Stem Evoked Responses in Cerebellopontile Angle Tumors." Archives of Otolaryngology - Head and Neck Surgery 113, no. 6 (June 1, 1987): 647–50. http://dx.doi.org/10.1001/archotol.1987.01860060073018.

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Yamada, Katsushi, Kimitaka Kaga, Akira Uno, Hideaki Sakata, and Toshihero Tsuzuku. "Auditory Evoked Responses under Total Spinal Anesthesia in Rats." Annals of Otology, Rhinology & Laryngology 106, no. 12 (December 1997): 1087–92. http://dx.doi.org/10.1177/000348949710601214.

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In order to investigate the function of the auditory pathway from the cochlea to the brain stem under total spinal anesthesia, the auditory brain stem response (ABR), compound action potential of the cochlear nerve (CAP), and cochlear microphonics (CM) were simultaneously recorded in rats. Total spinal anesthesia was induced by infusion of 2% lidocaine hydrochloride at a constant rate of 0.10 mL/min into the cerebrospinal fluid through the rats' skulls. The ABR completely disappeared within 1.5 to 4 minutes. After cessation of the injection, the ABR reappeared, starting from wave I and progressing through waves II and III to wave IV. The latency change of the CAP throughout the recording period was quite similar to that of wave I of the ABR. A reduction in amplitude of the CM was observed, but the CM did not disappear during the recording period. Disappearance of the ABR was due, not to loss of cochlear function, but to anesthetic effects on the acoustic nerve and the brain stem. Monitoring of the ABR provided information on the level of neural activity in the brain stem under total spinal anesthesia.

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Calero del Castillo, Juan B., Alberto J. Guillén Martínez, and Francisco García-Purriños García. "Search for normality criteria of auditory brain responses and auditory steady state response with free-field stimulation." Acta Otorrinolaringologica (English Edition) 70, no. 5 (September 2019): 258–64. http://dx.doi.org/10.1016/j.otoeng.2019.08.001.

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SCHATZ, JEFFREY, SUZANNE CRAFT, MYLES KOBY, and T. S. PARK. "Associative learning in children with perinatal brain injury." Journal of the International Neuropsychological Society 3, no. 6 (November 1997): 521–27. http://dx.doi.org/10.1017/s1355617797005213.

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Associate learning for visual nonverbal and auditory verbal items was examined in 21 children with spastic diplegic cerebral palsy (SDCP) and 28 healthy children using four paired associate tasks. SDCP children showed poorer performance than the comparison group for learning pairs that required visual nonverbal responses, regardless of the stimulus modality. Within the SDCP group, lesion severity was assessed in 17 of the children. Lesion severity was related to the level of performance on paired associate tasks requiring visual nonverbal responses; lesion severity did not reach statistical significance for tasks requiring auditory verbal responses. The study suggests: (1) periventricular white matter regions are important for the development of basic learning processes, such as associative learning, and (2) learning of visual nonverbal material is disproportionately affected following white matter injury early in life. (JINS, 1997, 3, 521–527.)

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Hirai, Yasuharu, Eri Nishino, and Harunori Ohmori. "Simultaneous recording of fluorescence and electrical signals by photometric patch electrode in deep brain regions in vivo." Journal of Neurophysiology 113, no. 10 (June 2015): 3930–42. http://dx.doi.org/10.1152/jn.00005.2015.

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Despite its widespread use, high-resolution imaging with multiphoton microscopy to record neuronal signals in vivo is limited to the surface of brain tissue because of limited light penetration. Moreover, most imaging studies do not simultaneously record electrical neural activity, which is, however, crucial to understanding brain function. Accordingly, we developed a photometric patch electrode (PME) to overcome the depth limitation of optical measurements and also enable the simultaneous recording of neural electrical responses in deep brain regions. The PME recoding system uses a patch electrode to excite a fluorescent dye and to measure the fluorescence signal as a light guide, to record electrical signal, and to apply chemicals to the recorded cells locally. The optical signal was analyzed by either a spectrometer of high light sensitivity or a photomultiplier tube depending on the kinetics of the responses. We used the PME in Oregon Green BAPTA-1 AM-loaded avian auditory nuclei in vivo to monitor calcium signals and electrical responses. We demonstrated distinct response patterns in three different nuclei of the ascending auditory pathway. On acoustic stimulation, a robust calcium fluorescence response occurred in auditory cortex (field L) neurons that outlasted the electrical response. In the auditory midbrain (inferior colliculus), both responses were transient. In the brain-stem cochlear nucleus magnocellularis, calcium response seemed to be effectively suppressed by the activity of metabotropic glutamate receptors. In conclusion, the PME provides a powerful tool to study brain function in vivo at a tissue depth inaccessible to conventional imaging devices.

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Cardin, Jessica A., and Marc F. Schmidt. "Song System Auditory Responses Are Stable and Highly Tuned During Sedation, Rapidly Modulated and Unselective During Wakefulness, and Suppressed By Arousal." Journal of Neurophysiology 90, no. 5 (November 2003): 2884–99. http://dx.doi.org/10.1152/jn.00391.2003.

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We used auditory responsiveness in the avian song system to investigate the complex relationship between behavioral state and sensory processing in a high-order sensorimotor brain area. We present evidence from recordings in awake, anesthetized, and sleeping male zebra finches ( Taeniopygia guttata) that auditory responsiveness in nucleus HVc is profoundly affected by changes in behavioral state. In anesthetized and sleeping birds, auditory responses were characterized by an increase in firing rate that was selective for the bird's own song (BOS) and highly stable over time. In contrast, HVc responses during wakefulness were extremely variable and transitioned between undetectable and robust levels over short intervals. Surprisingly, auditory responses in awake birds were not selective for the BOS stimulus. The variability of HVc auditory responses in awake birds suggests that, as in mammals, wakefulness is not a uniform behavioral state. Rather, auditory responsiveness likely is continually influenced by variables such as arousal state. We therefore developed several experimental paradigms in which we could manipulate arousal levels during auditory stimulus presentation. In all cases, arousal suppressed HVc auditory responses. This effect was specific to the song system, as auditory responses in Field L, a primary auditory area that is a source of auditory input to HVc, were unaffected. While arousal acts as a negative regulator of HVc auditory responsiveness, the presence and variability of the responses observed in awake, alert birds suggests that other mechanisms, such as attention, may enhance auditory responsiveness. The interplay between behavioral state and sensory processing may regulate song system responsiveness according to the bird's behavioral and social context.

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Stapells, David R., and Robert J. Ruben. "Auditory Brain Stem Responses to Bone-Conducted Tones in Infants." Annals of Otology, Rhinology & Laryngology 98, no. 12 (December 1989): 941–49. http://dx.doi.org/10.1177/000348948909801205.

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The auditory brain stem responses (ABRs) to 500- and 2,000-Hz bone-conducted (BC) tones were recorded from 48 infants with ears exhibiting various external and middle ear states (normal, otitis media, auditory meatal atresia). Amplitudes were greater, wave V latencies longer, and detectability better for responses to 500-Hz BC tones compared to 2,000-Hz BC tones. Overall, most (94% to 100%) infants with normal cochlear sensitivity demonstrate ABRs to 20-dB normal hearing level (nHL) 500-Hz BC tones and 30-dB nHL 2,000-Hz BC tones. In cases in which masking is difficult (eg, bilateral atresia), infant ipsilateral/contralateral ABR asymmetries may help determine from which cochlea a response to the BC tones originates. In conclusion, two-channel ABR recordings to BC tones appear to be feasible for demonstrating normal cochlear sensitivity in infants.

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Dormal, Giulia, Maxime Pelland, Mohamed Rezk, Esther Yakobov, Franco Lepore, and Olivier Collignon. "Functional Preference for Object Sounds and Voices in the Brain of Early Blind and Sighted Individuals." Journal of Cognitive Neuroscience 30, no. 1 (January 2018): 86–106. http://dx.doi.org/10.1162/jocn_a_01186.

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Sounds activate occipital regions in early blind individuals. However, how different sound categories map onto specific regions of the occipital cortex remains a matter of debate. We used fMRI to characterize brain responses of early blind and sighted individuals to familiar object sounds, human voices, and their respective low-level control sounds. In addition, sighted participants were tested while viewing pictures of faces, objects, and phase-scrambled control pictures. In both early blind and sighted, a double dissociation was evidenced in bilateral auditory cortices between responses to voices and object sounds: Voices elicited categorical responses in bilateral superior temporal sulci, whereas object sounds elicited categorical responses along the lateral fissure bilaterally, including the primary auditory cortex and planum temporale. Outside the auditory regions, object sounds also elicited categorical responses in the left lateral and in the ventral occipitotemporal regions in both groups. These regions also showed response preference for images of objects in the sighted group, thus suggesting a functional specialization that is independent of sensory input and visual experience. Between-group comparisons revealed that, only in the blind group, categorical responses to object sounds extended more posteriorly into the occipital cortex. Functional connectivity analyses evidenced a selective increase in the functional coupling between these reorganized regions and regions of the ventral occipitotemporal cortex in the blind group. In contrast, vocal sounds did not elicit preferential responses in the occipital cortex in either group. Nevertheless, enhanced voice-selective connectivity between the left temporal voice area and the right fusiform gyrus were found in the blind group. Altogether, these findings suggest that, in the absence of developmental vision, separate auditory categories are not equipotent in driving selective auditory recruitment of occipitotemporal regions and highlight the presence of domain-selective constraints on the expression of cross-modal plasticity.

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Llano, Daniel A., Bernard J. Slater, Alexandria M. H. Lesicko, and Kevin A. Stebbings. "An auditory colliculothalamocortical brain slice preparation in mouse." Journal of Neurophysiology 111, no. 1 (January 1, 2014): 197–207. http://dx.doi.org/10.1152/jn.00605.2013.

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Key questions about the thalamus are still unanswered in part because of the inability to stimulate its inputs while monitoring cortical output. To address this, we employed flavoprotein autofluorescence optical imaging to expedite the process of developing a brain slice in mouse with connectivity among the auditory midbrain, thalamus, thalamic reticular nucleus, and cortex. Optical, electrophysiological, anatomic, and pharmacological tools revealed ascending connectivity from midbrain to thalamus and thalamus to cortex as well as descending connectivity from cortex to thalamus and midbrain and from thalamus to midbrain. The slices were relatively thick (600–700 μm), but, based on typical measures of cell health (resting membrane potential, spike height, and input resistance) and use of 2,3,5-triphenyltetrazolium chloride staining, the slices were as viable as thinner slices. As expected, after electrical stimulation of the midbrain, the latency of synaptic responses gradually increased from thalamus to cortex, and spiking responses were seen in thalamic neurons. Therefore, for the first time, it will be possible to manipulate and record simultaneously the activity of most of the key brain structures that are synaptically connected to the thalamus. The details for the construction of such slices are described herein.

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Wada, H., T. Tsukahara, and H. Yaoita. "Auditory brain-stem responses (ABR) and CT scan in minor brain-stem injury." Electroencephalography and Clinical Neurophysiology 75 (January 1990): S159. http://dx.doi.org/10.1016/0013-4694(90)92299-c.

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HAMBERGER, MARLA J., and WILLIAM T. SEIDEL. "Auditory and visual naming tests: Normative and patient data for accuracy, response time, and tip-of-the-tongue." Journal of the International Neuropsychological Society 9, no. 3 (February 25, 2003): 479–89. http://dx.doi.org/10.1017/s135561770393013x.

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Naming is typically assessed with visual naming tasks, yet, some patients with genuine word-finding difficulty (evident in auditorily based discourse) show minimal difficulty on such measures. Evidence from cortical mapping, brain imaging and neuropsychological studies suggests that auditory naming measures might provide more relevant or at least, complementary information. We developed comparable auditory and visual naming tests and present normative data for accuracy, response time, and tip-of-the-tongue responses based on 100 controls. Test validity was supported by findings that left temporal lobe epilepsy (TLE) patients (i.e., a population with expected naming difficulty) performed more poorly on auditory but not visual naming compared to right TLE patients (i.e., a population without expected naming difficulty). Internal and test–retest reliability coefficients were reasonable. Finally, test utility was assessed on an individual basis, and auditory but not visual naming performance predicted impairment. (JINS, 2003, 9, 479–489.)

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Barascud, Nicolas, Marcus T. Pearce, Timothy D. Griffiths, Karl J. Friston, and Maria Chait. "Brain responses in humans reveal ideal observer-like sensitivity to complex acoustic patterns." Proceedings of the National Academy of Sciences 113, no. 5 (January 19, 2016): E616—E625. http://dx.doi.org/10.1073/pnas.1508523113.

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We use behavioral methods, magnetoencephalography, and functional MRI to investigate how human listeners discover temporal patterns and statistical regularities in complex sound sequences. Sensitivity to patterns is fundamental to sensory processing, in particular in the auditory system, because most auditory signals only have meaning as successions over time. Previous evidence suggests that the brain is tuned to the statistics of sensory stimulation. However, the process through which this arises has been elusive. We demonstrate that listeners are remarkably sensitive to the emergence of complex patterns within rapidly evolving sound sequences, performing on par with an ideal observer model. Brain responses reveal online processes of evidence accumulation—dynamic changes in tonic activity precisely correlate with the expected precision or predictability of ongoing auditory input—both in terms of deterministic (first-order) structure and the entropy of random sequences. Source analysis demonstrates an interaction between primary auditory cortex, hippocampus, and inferior frontal gyrus in the process of discovering the regularity within the ongoing sound sequence. The results are consistent with precision based predictive coding accounts of perceptual inference and provide compelling neurophysiological evidence of the brain's capacity to encode high-order temporal structure in sensory signals.

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SASAKI, Masaru, Tetsuya SAKAMOTO, Masatomo YAMASHITA, Haruhiko TSUTSUMI, Tohru ARUGA, Hidenori TOYOOKA, Koji MII, and Kintomo TAKAKURA. "Automatic and Serial Monitoring of Auditory Evoked Brain-stem Responses." Neurologia medico-chirurgica 25, no. 9 (1985): 738–44. http://dx.doi.org/10.2176/nmc.25.738.

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Adams, D. A., R. J. McClelland, H. G. Houston, and W. G. Gamble. "The effects of diazepam on the auditory brain stem responses." British Journal of Audiology 19, no. 4 (January 1985): 277–80. http://dx.doi.org/10.3109/03005368509078984.

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Journal articles on the topic 'Auditory Brain Responses'

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