• Neurology · Aug 2004

    Cortical reorganization during recovery from complex regional pain syndrome.

    • Christian Maihöfner, Hermann O Handwerker, Bernhard Neundörfer, and Frank Birklein.
    • Department of Neurology, University of Erlangen-Nuremberg, Erlangen, Germany. maihoefner@physiologie1.uni-erlangen.de
    • Neurology. 2004 Aug 24;63(4):693-701.

    ObjectiveTo characterize reorganization of the primary somatosensory cortex (S1) during healing process in complex regional pain syndrome (CRPS).BackgroundRecently, the authors showed extensive reorganization of the S1 cortex contralateral to the CRPS affected side. Predictors for these plastic changes were CRPS pain and the extent of mechanical hyperalgesia. It is unclear how these S1 changes develop following successful therapy.MethodsThe authors used magnetic source imaging to explore changes in the cortical representation of digits (D) 1 and 5 in relation to the lower lip on the unaffected and affected CRPS side in 10 patients during a year or more of follow-up.ResultsCortical reorganization reversed coincident with clinical improvement. A reduction of CRPS pain correlated with recovery from cortical reorganization.ConclusionsChanges of the somatotopic map within the S1 cortex may depend on CRPS pain and its recovery.

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