Auditory localization: role of auditory pathways in brain stem of the cat
| Autor: | W. D. Neff, J. H. Casseday |
|---|---|
| Rok vydání: | 1975 |
| Předmět: |
Sound localization
Inferior colliculus Auditory Pathways Physiology Biology Monaural Discrimination Learning Orientation Pons otorhinolaryngologic diseases medicine Avoidance Learning Auditory system Trapezoid body Animals Medulla Auditory Cortex Brain Mapping Medulla Oblongata General Neuroscience Lateral lemniscus Inferior Colliculi Electrophysiology medicine.anatomical_structure nervous system Superior olivary complex Auditory Perception Cats Neuroscience Brain Stem |
| Zdroj: | Journal of neurophysiology. 38(4) |
| ISSN: | 0022-3077 |
| Popis: | Cats were trained to localize sound in space. The animals' localization accuracy was determined before and after one of the following operations: 1) transection of the trapezoid body, 2) unilateral and 3) bilateral transection of the lateral lemniscus, 4) unilateral and 5) bilateral transection of the brachium of the inferior colliculus. The results after bilateral transections of the lateral lemniscus and the one deep bilateral transection of the brachium of the inferior colliculus indicate that some portion of the ascending auditory system must be intact above the medulla for an animal to be able to localize sound. A small loss in accuracy of localization was found after unilateral transection of the lateral lemniscus or brachium of the inferior colliculus. This loss, when compared with the much larger loss that monaural animals show, is an indication that binaural analysis, important for sound localization, occurs at the level of the medulla. Some transections of the trapezoid body resulted in a deficit in localization ability that appeared to be complete and permanent. The position of the lesions in the trapezoid body indicated that important encoding of the binaural cues to localization most likely occurs at the superior olivary complex, probably at the medial superior olive. But the trapezoid body or other commissures of the brain stem auditory system are probably also involved in transmission of information necessary for localization to higher centers. |
| Databáze: | OpenAIRE |
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