• Der Schmerz · Jun 2006

    [Motor cortical representation in patients with complex regional pain syndrome: a TMS study].

    • P Krause, S Förderreuther, and A Straube.
    • Neurologische Klinik und Poliklinik, Klinikum Grosshadern der Ludwig-Maximilians-Universität München. pkrause@nefo.med.uni-muenchen.de
    • Schmerz. 2006 Jun 1;20(3):181-4, 186-8.

    AbstractIn a group of patients with short- and long-term (chronic) duration of complex regional pain syndrome type I (CRPS I) motor cortical representation was determined, using a transcranial magnetic stimulation (TMS) mapping method. This was done, starting with suprathreshold intensities at the location of the largest MEP amplitude, mapping systematically in all directions. Patients were compared to a group of healthy subjects. In both patient groups we found significantly larger motor cortical representation for the unaffected hand muscles compared to the affected side. This asymmetry was absent in healthy subjects. Such motor cortical representation asymmetry can be considered an effect of altered sensomotor cortical representation. On the other hand, one must also consider the increased use of the unaffected hand and the presence of pain as cortical influencing variables. The real cause must remain speculative at this time.

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