Left hemiparalexia. Neurology 1992 Mar;42(3 Pt 1):562-9
Date
03/01/1992Pubmed ID
1307679DOI
10.1212/wnl.42.3.562Scopus ID
2-s2.0-0026751192 (requires institutional sign-in at Scopus site) 35 CitationsAbstract
Three patients with left splenial lesions made paralexic errors restricted to the left end of words. Errors appeared more frequently when a correct response was highly dependent on the initial letter of the stimulus. One patient had full visual fields with hemialexia affecting the left visual field. The other two patients had complete right hemianopia. We attribute left-sided reading errors in the hemianopic patients to a retinotopically restricted disconnection pattern that selectively disrupts transfer of information originating from the peripheral left visual field. Functional resistance of the more numerous transcallosal projections representing visual field adjacent to the vertical meridian may account for such a pattern. The emergence of positional reading errors from retinotopically restricted left hemifield disconnection suggests that callosal information transfer during normal reading may primarily involve elemental sensory rather than lexical/semantic information.
Author List
Binder JR, Lazar RM, Tatemichi TK, Mohr JP, Desmond DW, Ciecierski KAAuthor
Jeffrey R. Binder MD Professor in the Neurology department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AdultBrain
Dominance, Cerebral
Dyslexia, Acquired
Female
Humans
Magnetic Resonance Imaging
Male
Tomography, X-Ray Computed
