000281523 001__ 281523 000281523 005__ 20220930130056.0 000281523 0247_ $$2doi$$a10.1016/j.neuropsychologia.2015.12.022 000281523 0247_ $$2ISSN$$a0028-3932 000281523 0247_ $$2ISSN$$a1873-3514 000281523 0247_ $$2WOS$$aWOS:000370903800008 000281523 0247_ $$2altmetric$$aaltmetric:4946168 000281523 0247_ $$2pmid$$apmid:26721762 000281523 037__ $$aFZJ-2016-01212 000281523 082__ $$a610 000281523 1001_ $$0P:(DE-HGF)0$$aAchilles, E. I. S.$$b0$$eCorresponding author 000281523 245__ $$aEffect of meaning on apraxic finger imitation deficits 000281523 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2016 000281523 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1455007038_7283 000281523 3367_ $$2DataCite$$aOutput Types/Journal article 000281523 3367_ $$00$$2EndNote$$aJournal Article 000281523 3367_ $$2BibTeX$$aARTICLE 000281523 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000281523 3367_ $$2DRIVER$$aarticle 000281523 520__ $$aApraxia typically results from left-hemispheric (LH), but also from right-hemispheric (RH) stroke, and often impairs gesture imitation. Especially in LH stroke, it is important to differentiate apraxia-induced gesture imitation deficits from those due to co-morbid aphasia and associated semantic deficits, possibly influencing the imitation of meaningful (MF) gestures. To explore this issue, we first investigated if the 10 supposedly meaningless (ML) gestures of a widely used finger imitation test really carry no meaning, or if the test also contains MF gestures, by asking healthy subjects (n=45) to classify these gestures as MF or ML. Most healthy subjects (98%) classified three of the 10 gestures as clearly MF. Only two gestures were considered predominantly ML.We next assessed how imitation in stroke patients (255 LH, 113 RH stroke) is influenced by gesture meaning and how aphasia influences imitation of LH stroke patients (n=208). All patients and especially patients with imitation deficits (17% of LH, 27% of RH stroke patients) imitated MF gestures significantly better than ML gestures. Importantly, meaningfulness-scores of all 10 gestures significantly predicted imitation scores of patients with imitation deficits. Furthermore, especially in LH stroke patients with imitation deficits, the severity of aphasia significantly influenced the imitation of MF, but not ML gestures.Our findings in a large patient cohort support current cognitive models of imitation and strongly suggest that ML gestures are particularly sensitive to detect imitation deficits while minimising confounding effects of aphasia which affect the imitation of MF gestures in LH stroke patients. 000281523 536__ $$0G:(DE-HGF)POF3-572$$a572 - (Dys-)function and Plasticity (POF3-572)$$cPOF3-572$$fPOF III$$x0 000281523 588__ $$aDataset connected to CrossRef 000281523 7001_ $$0P:(DE-Juel1)131720$$aFink, G. R.$$b1$$ufzj 000281523 7001_ $$0P:(DE-HGF)0$$aFischer, M. H.$$b2 000281523 7001_ $$0P:(DE-Juel1)131718$$aDovern, A.$$b3$$ufzj 000281523 7001_ $$0P:(DE-HGF)0$$aHeld, A.$$b4 000281523 7001_ $$0P:(DE-Juel1)145382$$aTimpert, D. 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