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10 Cards in this Set
- Front
- Back
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What is agnosia
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Impaired recognition of perceived material; percept stripped of its meaning
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What differetiates apperceptive visual agnosia from associative visual agnosia?
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The former includes impaired discrimination of form while the latter is a disturbance of recognition with intact visual perception. People with the latter can bopy and match similar visual stimuli but can't identify what they are.
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Prosopagnosia
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Inability to recognize familiar faces. Cannot learn new faces.Most cases have had bilateral medial occipital lesions, or unilateral posteromedial lesions on the right.
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Gerstmann's syndrome?
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Finger agnosia, left-right discrimination, agraphia, acalculia
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Simulanagnosia
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Inability to simultaneously perceive more than one stimulus at a time. Noe attributed to hemispatial neglect.Bilateral parietooccipital lesions or lesion of the left occipital lobe.
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Why is left-sided neglect more pervasive than right-sided neglect?
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Right hemisphere dominant for spatial attention and mediates for both hemispheres while left hemisphere mediates only contralateral attention. Easier for right brain to compensate for right-sided neglect than left brain to compensate for left-sided.
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Anodiasphoria
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Indifference to deficits
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Anosagnosia
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Dential of weakness
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Anton's Syndrome
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Blindness and denial of blindness. Typically produced by cortical blindness from bilateral occipital lesions
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Describe blindsight
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A syndrome that may be seen with cortical blindness in which a patient may orient towards visual stimuli and detect object movement while experiencing no conscious perception of it. This is due to 2030-% of optic tract fibers being directed to the superior colliculi and pretectal region of brainstem.
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