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14 Cards in this Set

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  • Back
Balint's syndrome
acquired disturbance of the ability to perceive the visual field as a whole, resulting in an unpredictable perception and recognition of only parts of it (simultagnosia), which is accompanied by an impairment target pointing under visual guidance (optic ataxia) and an inability to shift gaze at will toward new visual stimuli (ocular apraxia)
Balint's syndrome (features)
able to see clearly in small part of visual field, which is not fixed but moves erratically from quadrant to quadrant, difficulty in seeing new objects, difficulty maintaining view of objects (seem to disappear), cannot report more than one or two components of visual field at a time.
Balint's syndrome (etiology)
bilat O-P lobe damage, usu more dorsal than lesions in agnosia or pure alexia). infarct in watershed b/w anterior and posterior cerebral artery territories. also from bilat metastases
stereo vision, ability to discriminate depth on the basis of binocular visual information
cerebral akinetopsia
acquired motion perception impairment; can include smooth pursuit mvmt and perceiving motion defined objects. can include breakdown of mechanism by which rapid progression of still pictures produces the illusion of mvmt.
cerebral akinetopsia (etiology)
damage to angular gyrus, P-T-O and P-O regions. usually from CV disease, cd be from AD or Balint's
d/o of line orientation (JOLO)
right posterior, esp O-P region
d/o of facial discrimination (Facial recog test)
cd be R prostolandic damage or L damage in pts w/ fluent postrolandic aphasia. Prosopag's can pass this test
constructional ability disturbances
etiology- PL, more often R
3 apraxias: 1) ideational apraxia
failure to conceive or formulate an action, either spontaneiosly or to command
2) ideomotor apraxia
inability to execute w/ either hand a movement that the pt knows, remembers, and can plan
3) kinetic limb apraxia
clumsiness and maladroitness of a limb in the performance of a skilled act that cannot be accounted for by paresis, ataxia, or sensory loss
visual constructional disturbance (i.e., Block Design)
not an apraxia, b/c skill might not be previously learned
dressing apraxia
more common in dementia or confusion, does not occur in isolation