Left neglect dyslexia and the processing of neglected information.
A patient (ES) with a right fronto-temporo-parieto-occipital lesion, and left neglect dyslexia, is reported. ES performed reading and association tasks on written words, composed of two embedded words, one to the left and one to the right of the division point. The meaning of the whole stimulus differed from that of the embedded words, and could not be inferred from either of them. ES produced appropriate associations even to those stimuli on which she made neglect paralexic errors. This dissociation reflects a distinction between processes which use co-ordinate spatial systems and subserve perceptual awareness, impaired in hemineglect, and processes which do not. The latter analyse left-sided information to a large extent, without reaching awareness.
Vallar
G
G
Dipartimento di Psicologia, Università di Roma "La Sapienza", Italy.
Guariglia
C
C
Nico
D
D
Tabossi
P
P
D000368:Aged; D000369:Aged, 80 and over; D003072:Cognition Disorders / Q000000981:diagnostic imaging / Q000473:pathology / Q000523:psychology*; D004410:Dyslexia / Q000000981:diagnostic imaging / Q000473:pathology / Q000523:psychology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008568:Memory / Q000502:physiology; D008606:Mental Processes / Q000502:physiology*; D009483:Neuropsychological Tests; D011932:Reading; D013028:Space Perception / Q000502:physiology; D014057:Tomography, X-Ray Computed; D014796:Visual Perception / Q000502:physiology