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Visual deficits in a patient with `kaleidoscopic disintegration of the visual world'
Author(s) -
Vaina L. M.,
Cowey A.,
LeMay M.,
Bienfang D. C.,
Kikinis R.
Publication year - 2002
Publication title -
european journal of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.881
H-Index - 124
eISSN - 1468-1331
pISSN - 1351-5101
DOI - 10.1046/j.1468-1331.2002.00435.x
Subject(s) - perception , neuropsychology , motion (physics) , visual perception , object (grammar) , reading (process) , cognitive psychology , motion perception , right hemisphere , psychology , visual system , neuroscience , computer vision , artificial intelligence , computer science , visual cortex , cognition , philosophy , linguistics
We describe psychophysical, neuropsychological and neuro‐ophthalmological studies of visual abilities in a patient who, following a right hemisphere stroke, had difficulty in combining parts of objects into a whole and in reading. Strikingly, her perceptual problems were accentuated when the objects moved or when she moved. Formal testing showed that her main deficits were in depth perception, various tasks of motion and object recognition of degraded stimuli. But low‐level detection and discrimination of form and color were normal. Despite her deficits in visual motion and degraded static‐object recognition, her visual recognition of `biological motion' stimuli was normal. Structural magnetic resonance imaging revealed an infarct in the ventro‐medial occipito‐temporal region, extending ventro‐laterally and leading to a `kaleidoscopic disintegration of visible objects'.