Psychology 3325 Lecture Notes - Visual Cortex, Auditory Cortex, Fingerspelling

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4 Mar 2013
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Geschwind, quandfasel and segarra described case of woman who had suffered sever brain damage from inhaling co from faulty water heater. Damage spared primary auditory cortex, speech areas of brain and connections between two. Woman"s speech mechanisms could receive auditory input and could control muscles used for speech, but received no information from other senses or from neural circuits that contain memories concerning past experiences and meaning of words. Woman made few movements except with her eyes which were able to follow moving objects gave no evidence of recognizing objects or people. Didn"t spontaneously say anything, answer questions, or give signs that she understood what other people said to her. Visual agnosia: lack of awareness of visual perceptions. Visual agnosia inability of person who is not blind to recognize identity of an object visually; caused by brain damage to visual association cortex.

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