Auditory-visual integration in fields of the auditory cortex
| Autor: | Michinori Kubota, Junsei Horikawa, Hisayuki Ojima, Yutaka Hosokawa, Shunji Sugimoto |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Male Visual perception Auditory visual Guinea Pigs Action Potentials Sensory system Biology Auditory cortex Styrenes 03 medical and health sciences 0302 clinical medicine Optical imaging medicine Reaction Time Animals Fluorescent Dyes Auditory Cortex Communication business.industry Optical Imaging Sensory Systems Electrophysiological Phenomena 030104 developmental biology medicine.anatomical_structure Acoustic Stimulation Cerebral cortex Auditory stimuli Negative peak Auditory Perception Visual Perception business Neuroscience 030217 neurology & neurosurgery Photic Stimulation |
| Zdroj: | Hearing research. 346 |
| ISSN: | 1878-5891 |
| Popis: | While multimodal interactions have been known to exist in the early sensory cortices, the response properties and spatiotemporal organization of these interactions are poorly understood. To elucidate the characteristics of multimodal sensory interactions in the cerebral cortex, neuronal responses to visual stimuli with or without auditory stimuli were investigated in core and belt fields of guinea pig auditory cortex using real-time optical imaging with a voltage-sensitive dye. On average, visual responses consisted of short excitation followed by long inhibition. Although visual responses were observed in core and belt fields, there were regional and temporal differences in responses. The most salient visual responses were observed in the caudal belt fields, especially posterior (P) and dorsocaudal belt (DCB) fields. Visual responses emerged first in fields P and DCB and then spread rostroventrally to core and ventrocaudal belt (VCB) fields. Absolute values of positive and negative peak amplitudes of visual responses were both larger in fields P and DCB than in core and VCB fields. When combined visual and auditory stimuli were applied, fields P and DCB were more inhibited than core and VCB fields beginning approximately 110 ms after stimuli. Correspondingly, differences between responses to auditory stimuli alone and combined audiovisual stimuli became larger in fields P and DCB than in core and VCB fields after approximately 110 ms after stimuli. These data indicate that visual influences are most salient in fields P and DCB, which manifest mainly as inhibition, and that they enhance differences in auditory responses among fields. |
| Databáze: | OpenAIRE |
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