Universität zu Köln

Dafsari, Hormos Salimi, Dovern, Anna, Fink, Gereon R. ORCID: 0000-0002-8230-1856 and Weiss, Peter H. ORCID: 0000-0002-5230-9080 (2019). Deficient body structural description contributes to apraxic end-position errors in imitation. Neuropsychologia, 133. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-3514

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Abstract

Apraxia is a common cognitive deficit after left hemisphere (LH) stroke. It has been suggested that a disturbed representation of the human body underlies apraxic imitation deficits. Thus, we here tested the hypothesis that a deficient body structural description (BSD), i.e., a deficient representation of a body part's position (relative to a standard human body), contributes to apraxic end-position errors in imitation, while controlling for deficits in the semantic representation of the human body (body image, BI) and naming deficits. A quantitative pointing task to assess putative BSD deficits and an apraxia assessment, including imitation and pantomime tasks, were applied to 27 patients with LH stroke and 19 healthy subjects. While LH stroke patients without apraxia (n = 15) did not differ from control subjects in their pointing performance, patients suffering from imitation apraxia (n = 10) showed a differential deficit when pointing to body parts of other humans compared to object parts. Voxel-based lesion symptom mapping (VLSM) revealed an association of these differential pointing deficits (indicating a deficient BSD) with lesions in the angular gyrus of the left inferior parietal cortex. This first quantitative group study of BSD deficits in LH stroke patients supports the notion that apraxic end-position errors in imitation are - at least in part - due to a deficient coding of the position of human body parts.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Dafsari, Hormos Salimi UNSPECIFIED UNSPECIFIED UNSPECIFIED Dovern, Anna UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED Weiss, Peter H. UNSPECIFIED orcid.org/0000-0002-5230-9080 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-132098
DOI:	10.1016/j.neuropsychologia.2019.107150
Journal or Publication Title:	Neuropsychologia
Volume:	133
Date:	2019
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-3514
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HUMAN BRAIN-LESIONS; PARTS; REPRESENTATIONS; MULTIPLE; STROKE; DISTURBANCES; LOCALIZATION; PANTOMIME; GESTURES; APHASIA Multiple languages Behavioral Sciences; Neurosciences; Psychology, Experimental Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13209