The dissociation of visuospatial neglect and neglect dyslexia.
A right-handed man with a left hemisphere lesion extending into the right hemisphere, with evidence of both a left-sided neglect dyslexia and right-sided visuospatial neglect is reported. When copying simple geometric designs he omitted to copy figures on the right-hand side of the page, when bisecting lines he tended to bisect the line to the left of the line's actual centre. He had a neglect dyslexia which was characterised by paralexic errors affecting the beginning (that is, left) of words. The occurrence of these two phenomena provides evidence of a dissociation of these forms of neglect. The findings are discussed in relation to the possible mechanisms of unilateral neglect.
Costello
A D
AD
National Hospital for Nervous Diseases, London, UK.
Warrington
E K
EK
D000368:Aged; D001932:Brain Neoplasms / Q000503:physiopathology; D003337:Corpus Callosum / Q000503:physiopathology; D004292:Dominance, Cerebral / Q000502:physiology*; D004411:Dyslexia, Acquired / Q000503:physiopathology*; D006423:Hemianopsia / Q000503:physiopathology*; D006801:Humans; D008223:Lymphoma / Q000503:physiopathology; D008297:Male; D009483:Neuropsychological Tests; D009778:Occipital Lobe / Q000503:physiopathology; D009949:Orientation / Q000502:physiology; D010296:Parietal Lobe / Q000503:physiopathology; D011597:Psychomotor Performance / Q000502:physiology; D013028:Space Perception / Q000502:physiology*; D014057:Tomography, X-Ray Computed; D014796:Visual Perception / Q000502:physiology*