PSYC 207 Chapter Notes -Visual System, Auditory System, Medical Ultrasound
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1st established by studying patients w/ disease lateralized to 1 hemisphere. Owe current knowledge about localization & lateralized to study subjects. Unilateral lesions in left hemisphere (right handed patients) = aphasia (don"t occur from lesions in right hemisphere [left=language]) Double dissociation by hans-leukas teuber: prove that lesions to one side don"t disturb the other. Surgical procedure of corpus callosum to disconnect hemispheres. Bogen & vogel: section corpus callosum & smaller anterior commissure. Medically beneficial (seizure free) but had unique syndromes. Figure 11. 4:effect of commissurotomy on connections between the. Figure 11. 5: information from visual field only sent to one hemisphere. Visual pathways are crossed, visual fields (not eyes) represented in each hemisphere, visual world (from both eyes) project to only one hemisphere. Left visual fields of both eyes project to right visual cortex. Both right fields project to left visual cortex.
