PSYCH261 Lecture Notes - Lecture 11: Visual Agnosia, Temporal Lobe, Akinetopsia
28 Nov 2015
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Ability to perceive shape the same way despite different angles and size. Inability to recognize objects by sight (can see features of the objects but can"t put them together to make a meaningful whole object) Can put features together but can"t link them to the concept of what it is. No problem identifying object by sight but can"t seem to reach for it appropriately. Double dissociation (affect dorsal stream but left ventral stream intact (optic ataxia. Even if motion is inferred, there is activation of the mt. Damage = motion blindness (hard to perceiving motion, see series of snapshots rather than seeing it as continuous movements) Damage to area v1 (can"t even visually see the object at all but can detect which direction the movement is) Saccade (jerky movements of the eye lead to motion blindness but it is suppressed so that we don"t experience that v1 is suppressed so that we don"t experience motion blindness)
