PSCH 343 Lecture Notes - Lecture 8: Olfactory Bulb, Taste Receptor, Retinotopy
Document Summary
Sound pressure waves are amplified and travel into the cochlea by structures of the ear. Stereocilia are the receptor cells of the auditory system. These are small hair cells that line the basilar membrane of the cochlea. When the basilar membrane vibrates, the cilia are pushed into one another, and this results in the depolarization of the hair cells. What is a tonotopic map? auditory areas in subcortex and cortex contain tonotopic maps, in which the physical dimension reflected in neural organization is the sound frequency of a stimulus. With a tonotopic map, some cells are maximally activated by a 1000-hz tone, and others by a 5000-hz tonotopic organization can be seen in humans using an fmri. The base of the cochlea is sensitive to high frequency sounds, and the apex is sensitive to low frequency sounds. The spacing of the ears results in two types of information we can use to deduce the location of a sound source.
