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ERIC Number: EJ730522
Record Type: Journal
Publication Date: 2004-Aug
Pages: 11
Abstractor: Author
ISBN: N/A
ISSN: ISSN-0278-2626
EISSN: N/A
Misprojection of Landmarks onto the Spatial Map
Toraldo, Alessio; Reverberi, Carlo
Brain and Cognition, v55 n3 p479-489 Aug 2004
It has been suggested that neglect patients misrepresent the metric spatial relations along the horizontal axis (anisometry). The ''fabric'' of their internal spatial medium would be distorted in such a way that physically equal distances appear relatively shorter on the contralesional side (canonical anisometry). The case of GL, a 76-year-old lady with left neglect on visual search tasks, is presented. GL showed severe relative overestimation on the left (contralesional) side on two independent tasks evaluating the metrics of her internal representation. A qualitatively similar pattern was found in two out of 10 other neglect patients who performed the second task. This behavior cannot be accounted for by the canonical anisometry hypothesis. Nevertheless, GL produced a relative left overextension (underestimation) when trying to set the endpoints of a virtual line given its midpoint (Endpoints Task). An interpretation of these results is offered in terms of a misprojection of relevant landmarks onto the internal representation without assuming distortion of its ''fabric.''
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A