PSYC 169 Lecture Notes - Lecture 7: Prosopagnosia, Angular Gyrus, Fusiform Gyrus
20 Mar 2018
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Document Summary
Visual system and the agnosias, patient diane could know how big a thing is. Blindsight: 2 visual pathways: lgn -> dorsal how pathway (goes toparietal) vs ventral what. Pathway (goes to temporal: how pathway and visual pathway disconnect = don"t know where to grab object in front of them, dl damage = form perception. Look at object or face -> temporal cortex -> goes to amygdala (emotional center) Intact navigation: drawing from memory intact, tunnel vision. Illusion: circle looks smaller, but fingers open up to the same/right size: absent hand hurts and tingles when shaving side of face. Left angular gyrus damage: disrupts mathematical ability - usually dyscalculia and finger agnosia: right angular gyrus damage: disrupts artistic ability. Right parietal lobe was presented with conflicting signals. Visual feedback telling him that his arm is moving again while his muscles are telling him the arm is not there - his mind resorted to a form of denial.
