COGS 17 Lecture Notes - Lecture 12: Glib, Cerebellum, Paraphasia
14 Mar 2017
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Includes manual control: ~90% humans are right-handed, even prehistorically (per early tools, artwork, etc. ) E. g. while talking (left hemi dom), will tap more slowly w/right hand (left hemi dom), than w/left hand (right hemi dom) E. g. stuttering (most often in left-handers) may involve hemispheric competition for control of speech. Vision: right visual cortex receives from left visual field (from right retinas of both eyes) & vice versa. Somatosensory: right somatosensory cortex from left half of body (& vice versa); face more shared. Motor: right hemisphere controls left half of body (& vice versa); both control face altho opposite dominant. Right hemisphere is usually dominant for visio-spatial tasks and socio-emotional processes (see more below) Left hemisphere is usually dominant for language & other sequential and analytic processes. Planum temporale - area in temporal cortex (includes wernicke"s area) - larger in left hemisphere. In nonhuman primates: equal or only slightly larger in left, also involved in vocal communication.
