Systematic mapping of the monkey inferior colliculus reveals enhanced low frequency sound representation.
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We investigated the functional architecture of the inferior colliculus (IC) in rhesus monkeys. We systematically mapped multiunit responses to tonal stimuli and noise in the IC and surrounding tissue of six rhesus macaques, collecting data at evenly placed locations and recording nonresponsive locations to define boundaries. The results show a modest tonotopically organized region (17 of 100 recording penetration locations in 4 of 6 monkeys) surrounded by a large mass of tissue that, although vigorously responsive, showed no clear topographic arrangement (68 of 100 penetration locations). Rather, most cells in these recordings responded best to frequencies at the low end of the macaque auditory range. The remaining 15 (of 100) locations exhibited auditory responses that were not sensitive to sound frequency. Potential anatomical correlates of functionally defined regions and implications for midbrain auditory prosthetic devices are discussed.
Sensory Receptor Cells
Published Version (Please cite this version)10.1152/jn.00857.2010
Publication InfoGroh, Jennifer; & Bulkin, David A (2011). Systematic mapping of the monkey inferior colliculus reveals enhanced low frequency sound representation. Journal of neurophysiology, 105(4). pp. 1785-1797. 10.1152/jn.00857.2010. Retrieved from https://hdl.handle.net/10161/17895.
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Professor of Psychology and Neuroscience
Research in my laboratory concerns how sensory and motor systems work together, and how neural representations play a combined role in sensorimotor and cognitive processing (embodied cognition). Most of our work concerns the interactions between vision and hearing. We frequently perceive visual and auditory stimuli as being bound together if they seem likely to have arisen from a common source. That's why we tend not to notice that the speakers on TV sets or in movie theatres are located bes