02-12 Lecture Slides (Final)

By line but still fail to recognize objects video on

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Unformatted text preview: ord Level No top- down support from the word Letter Level level! Feature Level RWOK WORD D WORK Word Level K Letter Level Feature Level The top-down signal from the word level leads to the word superiority effect! 7 2/12/13 Neural Basis of Visual Pattern Recognition n༆  n༆  Damage to the visual areas of the brain can lead to visual recognition impairments Different visual recognition disorders ¨༊  Letters and words: Alexia (or acquired dyslexia) n༆  Different from developmental dyslexia ¨༊  Objects: Visual agnosia ¨༊  Faces: Prosopagnosia Visual Agnosia n༆  Impairment in the ability to recognize objects despite intact rudimentary perceptual abilities ¨༊  Patients with visual agnosia are not blind; they can see, but cannot identify n༆  Two types of visual agnosias ¨༊  Apperceptive agnosia ¨༊  Associative agnosia Apperceptive Agnosia Left Right Associative Agnosia Left Right 8 2/12/13 Apperceptive Agnosia n༆  n༆  Cannot discriminate between objects Cannot copy/match simple shapes Associative Agnosia n༆  n༆  Can copy and match simple shapes line by line But still fail to recognize objects Video on Visual Agnosia: What to Look for n༆  n༆  n༆  n༆  URL: http://www.youtube.com/watch?v=ze8VVtBgK7A Does this patient suffer from apperceptive agnosia or associative agnosia? Does this patient have problems in recognizing faces? How about words? What does he say is problematic when he tries to recognize objects? 9 2/12/13 Prosopagnosia n༆  Impairment in the ability to recogn...
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This note was uploaded on 02/18/2014 for the course PSYC 2145 taught by Professor Cheriking during the Spring '07 term at Colorado.

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