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Full-Text Articles in Neuroscience and Neurobiology
Multisensory Responses In Primary Auditory Cortex Of The Cat, Catherine Boucher
Multisensory Responses In Primary Auditory Cortex Of The Cat, Catherine Boucher
Electronic Thesis and Dissertation Repository
Core auditory cortex of the cat is comprised of primary auditory cortex (A1) and the anterior auditory field (AAF). Neurons in both fields respond strongly to acoustic stimuli and are tonotopically organized. In hearing animals, a small number of cells in AAF respond to tactile stimulation. However, it is unclear if multisensory input influences responses in A1. In this study, multisensory stimuli were developed by pairing a pure tone stimulus with a flash stimulus at various stimulus onset asynchronies. A linear multielectrode array recorded multi-unit activity in A1 across cortical layers. We identified unisensory auditory, unisensory visual, bimodal, and subthreshold …
Differential Thickening And Thinning Of Auditory Cortex In Deaf Cats Revealed With Ultra-High-Field Mri, Stephen G. Gordon
Differential Thickening And Thinning Of Auditory Cortex In Deaf Cats Revealed With Ultra-High-Field Mri, Stephen G. Gordon
Electronic Thesis and Dissertation Repository
In the absence of hearing, the brain must adapt and repurpose the former auditory cortex. In this study we scanned normal hearing (n=29) and deaf (n=26) cats to identify cortical areas of differing thickness using the auditory regions from a 3D cortical atlas. Compared to hearing controls, differential thickening and thinning was observed in specific regions of the deaf auditory cortex. More dorsal auditory regions tended to be bilaterally thicker in the deaf group, while more ventral regions in the left hemisphere were thinner. The location and nature of these changes creates a gradient along the dorsoventral axis wherein dorsal …