PSCH 366 Study Guide - Quiz Guide: Cochlear Implant, Medial Geniculate Nucleus, Cochlear Nucleus
Document Summary
What physical stimulus is transduced in each of the special senses? neural signal, i. e. change in activity of neuron, is induced when receptor is activated. 4 what do the outer (pinna, ear canal) and middle (tympanic membrane, incus, malleus, stapes) ear do to sound pressure waves? amplify. Within the organ of corti on a thin basilar membrane in the cochlea of the inner ear. When basilar membrane vibrates, mechanical shear deflects cilia, resulting in depolarization of hair cell. The hair cells of the cochlea are the primary receptors. The output from the auditory nerve projects to the cochlear nuclei in the brainstem. Ascending fibers reach the auditory cortex following synapses in the inferior colliculus and medial geniculate nucleus. The cochlear implant mimics natural hearing by activating the auditory nerve artificially via electrical stimulation of the cochlea. 12 the spacing of the ears results in two types of information we can use to deduce the location of a sound source.
