NEUROSCI 101 Lecture Notes - Lecture 13: Auditory Cortex, Visual Cortex, Eardrum
1 Mar 2016
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What is important to remember when build a prosthetic eye? (using knowledge of visual system) Try to get information into brain without using optic nerve direct connection with primary visual cortex. Sensitivity to wavelength (color) separated by labeled lines. Dorsal and ventral streams: differences between peripheral (where) and foveal (what) visual field, dorsal = spatial, ventral = object recognition. Coding topographically onto the primary visual cortex (map) Speech sounds activate more of the temporal lobe than noise sounds activate. Pressure component (waves from alternating compression and rarefaction) Human ears only sensitive to pressure component and only certain range. Changes in physical dimension of sound waves change perceptual dimension. Sound-collecting component funnels compressed air into tympanic membrane (ear drum) Malleus pressed by ear drum, presses on incus, presses on stapes, presses on membrane connected to the cochlea these are tiny bones. Inner ear nervous system connection assists in balance (fluid) contains cochlea.
