PSYB65H3 Lecture Notes - Medial Geniculate Nucleus, Auditory Cortex, Semicircular Canals
29 Nov 2013
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Tonotopic theory: different points on basilar membrane & in the cortex represent different sound frequencies. Axons of hair cells ofrm the auditory nerve. Next, axons project to the inferior colliculus & then relay through the medial geniculate nucleus of the thalamus. One, pathway projects to the primary auditory cortex, while the other projects to the secondary auditory cortex. 4 major somatosensory submodalities: nocioception, perception of pain, perception of temperature, anything that impacts a person s survivability, hapsis, fine touch, proprioception, perception of position of body in space, balance. Wilder penfield: stimulated somatosensory cortex in epileptic patients & topographically mapped si. Homunculus little human : disproportionate sizes, larger area = higher sensitivity, larger area = more neural representation we have in the cortex. Number of homunculi exist in the somatosensory cortex. Allows us to perceive our motion & maintain balance. Consists of: semicircular canals, otolith organs. Semicircular canals & otolith organs contain hair cells that bend when we moth.
