Dual task effect on postural control in patients with degenerative cerebellar disorders

Heike Jacobi, Juliane Alfes, Martina Minnerop, Jürgen Konczak, Thomas Klockgether, Dagmar Timmann

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20 Scopus citations


Background: The cerebellum plays an important role for balance control and the coordination of voluntary movements. Beyond that there is growing evidence that the cerebellum is also involved in cognitive functions. How ataxic motor symptoms are influenced by simultaneous performance of a cognitive task, however, has rarely been assessed and some of the findings are contradictory. We assessed stance in 20 patients with adult onset degenerative almost purely cerebellar disorders and 20 healthy controls during single and dual task conditions (verbal working memory task). To objectively measure postural sway and the impact of somatosensory, visual and vestibular inputs we used static and dynamic posturography with the Sensory Organization Test (SOT). Results: In both groups, cerebellar patients and controls, dual tasking reduced all sway parameters. Reduction of sway path was higher in cerebellar patients and increased with the difficulty of the postural task. The frequency of falls was higher in the patients group especially during the more challenging conditions and dual task performance in particular increased the risk of falls in cerebellar patients. Conclusion: Dual task conditions had a larger impact on sway parameters in patients with chronic cerebellar disorders than in healthy controls and lead to an increased risk of falls. As performing two tasks simultaneously is common and therefore important in daily life dual task exercises should be part of physical therapy programs for cerebellar patients.

Original languageEnglish (US)
Article number6
JournalCerebellum and Ataxias
Issue number1
StatePublished - May 8 2015

Bibliographical note

Funding Information:
H. Jacobi: None. J. Alfes: None. M. Minnerop: None. J. Konczak: None. T. Klockgether receives/has received research support from the Deutsche Forschungsgemeinschaft (DFG), the Bundesministerium für Bildung und Forschung (BMBF) and the European Union (EU). He serves on the editorial board of The Cerebellum. He received a lecture honorarium from Lundbeck and from Biogen Idec. He receives royalties for book publications from Thieme, Urban & Schwarzenberg, Kohlhammer, Elsevier, Wissenschaftliche Verlagsgesellschaft Stuttgart and M. Dekker. D. Timmann received research support from the German Research Foundation (DFG TI 239/10-1; 10–2; 14–1), the European Union (Partner in one of the Marie Curie Initial Training Networks), the Bernd Fink Foundation, and the German Heredoataxia Foundation.

Publisher Copyright:
© 2015 Jacobi et al.; licensee BioMed Central.


  • Cerebellar ataxia
  • Dual task
  • Postural control
  • Static and dynamic posturography


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