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@ARTICLE{Achilles:281523,
      author       = {Achilles, E. I. S. and Fink, G. R. and Fischer, M. H. and
                      Dovern, A. and Held, A. and Timpert, D. C. and Schroeter, C.
                      and Schuetz, K. and Kloetzsch, C. and Weiss, P. H.},
      title        = {{E}ffect of meaning on apraxic finger imitation deficits},
      journal      = {Neuropsychologia},
      volume       = {82},
      issn         = {0028-3932},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2016-01212},
      pages        = {74 - 83},
      year         = {2016},
      abstract     = {Apraxia 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.},
      cin          = {INM-3},
      ddc          = {610},
      cid          = {I:(DE-Juel1)INM-3-20090406},
      pnm          = {572 - (Dys-)function and Plasticity (POF3-572)},
      pid          = {G:(DE-HGF)POF3-572},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000370903800008},
      pubmed       = {pmid:26721762},
      doi          = {10.1016/j.neuropsychologia.2015.12.022},
      url          = {https://juser.fz-juelich.de/record/281523},
}