| Positional, directional and speed selectivities in the primary auditory cortex of the cat. | |
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MedLine Citation:
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PMID: 9387982 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Responses of high-frequency primary auditory cortex (A1) neurons of the cat to noise stimulation were obtained in a quasianechoic chamber using a static and an apparently moving stimulus presented at similar azimuths. Simulated motion toward right or left as well as different simulated velocities were used. Under static stimulation, most units were contralateral-preferring followed by ipsilateral- and midline-preferring. Some were omnidirectional and a few were unclassifiable. Width of tuning was similar for contralateral-, ipsilateral- and midline-preferring units. Overall, about 25% were finely tuned (< 20 degrees) and the remaining were broadly tuned (> or =20 degrees). All cells sampled with static stimulation responded to apparent motion. About one quarter of the units were sensitive to the direction of the simulated moving noise in that they responded at least twice as much to one direction as to the other. Almost all directional contralateral-preferring units responded more when the apparent motion was directed toward ipsilateral azimuths, whereas all directional ipsilateral-preferring units responded preferentially to contralaterally oriented motion. In some units, up to five apparent speeds were tested. About half the units were not speed-selective (46%). The other cells were tuned to a preferential speed (40%), decreased their response as the apparent speed increased (10%) or displayed direction-dependent speed selectivity (4%). These results indicate that moving-sound sources are processed by some A1 single units. |
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Authors:
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P Poirier; H Jiang; F Lepore; J P Guillemot |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Hearing research Volume: 113 ISSN: 0378-5955 ISO Abbreviation: Hear. Res. Publication Date: 1997 Nov |
Date Detail:
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Created Date: 1998-01-15 Completed Date: 1998-01-15 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 1-13 Citation Subset: IM |
Affiliation:
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Groupe de Recherche en Neuropsychologie Expérimentale, Montréal, Qué, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Animals Auditory Cortex / cytology, physiology* Cats Motion Neurons / physiology Psychoacoustics Sound Localization / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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