Selective Alexia and Agraphia Sparing Numbers--A Case Study

Autor/in	Starrfelt, Randi
Titel	Selective Alexia and Agraphia Sparing Numbers--A Case Study
Quelle	In: Brain and Language, 102 (2007) 1, S.52-63 (12 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0093-934X
DOI	10.1016/j.bandl.2006.09.005
Schlagwörter	Learning Disabilities; Perceptual Impairments; Reading Difficulties; Writing Difficulties; Numbers; Neurological Impairments; Brain + Suchen Sie Ihr Suchwort? Learning handicap; Lernbehinderung; Perceptual handicaps; Wahrnehmungsstörung; Reading difficulty; Leseschwierigkeit; Schreibstörung; Zahlenraum; Neurodegenerative Erkrankung; Gehirn
Abstract	We report a patient (MT) with a highly specific alexia affecting the identification of letters and words but not numbers. He shows a corresponding deficit in writing: his letter writing is impaired while number writing and written calculation is spared. He has no aphasia, no visuo-perceptual or -constructional difficulties, or other cognitive deficits. A similar pattern of performance has to our knowledge only been reported once before [Anderson, S. W., Damasio, A. R., & Damasio, H. (1990). Troubled letters but not numbers. Domain specific cognitive impairments following focal damage in frontal cortex. "Brain," 113, 749-766]. This study shows that letter and number reading are dependent on dissociable processes. More interestingly, it points to a common mechanism subserving the perception and production of letters. We suggest that a deficit in a visuo-motor network containing knowledge of the physical shape of letters might explain the pattern of performance displayed by MT. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10