Adaptive Motor Behavior of Cerebellar Patients during Exposure to Unfamiliar External Forces

Stefanie Richter, Matthias Maschke, Dagmar Timmann, Jürgen Konczak, Tobias Kalenscher, Anton R. Illenberger, Karl Theodor Kalveram

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The authors investigated adaptation of goal-directed forearm movements to an unknown external viscous force assisting forearm flexion in 6 patients with cerebellar dysfunction and in 6 control participants. Motor performance was generally degraded in cerebellar patients and was markedly reduced under the force condition in both groups. However, patients and controls were able to adapt to the novel force within 8 trials. Only the healthy controls were able to improve motor performance when readapting to a null-force condition. The results indicate that cerebellar patients' motor control system has imprecise estimations of actual limb dynamics at its disposal. Force adaptation may have been preserved because single-joint movements were performed, whereas the negative viscous force alone and no interaction forces had to be compensated.

Original languageEnglish (US)
Pages (from-to)28-38
Number of pages11
JournalJournal of Motor Behavior
Volume36
Issue number1
DOIs
StatePublished - Mar 1 2004

Keywords

  • Cerebellum
  • Human
  • Inverse dynamic models
  • Motor control
  • Motor learning

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    Richter, S., Maschke, M., Timmann, D., Konczak, J., Kalenscher, T., Illenberger, A. R., & Kalveram, K. T. (2004). Adaptive Motor Behavior of Cerebellar Patients during Exposure to Unfamiliar External Forces. Journal of Motor Behavior, 36(1), 28-38. https://doi.org/10.3200/JMBR.36.1.28-38