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

Jacobi H, Alfes J, Minnerop M, Konczak J, Klockgether T, Timmann D - Cerebellum Ataxias (2015)

Bottom Line: 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.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).

View Article: PubMed Central - PubMed

Affiliation: Department of Neurology, University Hospital of Bonn, Bonn, Germany.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus

Sway path of center of gravity in condition 6 comparing single and dual task conditions for a healthy control and two cerebellar patients; modified according to [18].
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Fig1: Sway path of center of gravity in condition 6 comparing single and dual task conditions for a healthy control and two cerebellar patients; modified according to [18].

Mentions: Typical examples of sway path of a healthy control participant and two cerebellar patients with and without dual tasking during condition 6 are shown in FigureĀ 1. Sway path of the control participant is short with an emphasis on anteroposterior sway during single task and slightly reduced during dual task. Anteroposterior and mediolateral sway path of the cerebellar patient is increased compared to the control during both conditions, single and dual task, and decreases during dual tasking. The last example shows sway path of a cerebellar patient before a fall with increased sway in anteroposterior and mediolateral direction during dual task.Figure 1


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

Jacobi H, Alfes J, Minnerop M, Konczak J, Klockgether T, Timmann D - Cerebellum Ataxias (2015)

Sway path of center of gravity in condition 6 comparing single and dual task conditions for a healthy control and two cerebellar patients; modified according to [18].
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4552271&req=5

Fig1: Sway path of center of gravity in condition 6 comparing single and dual task conditions for a healthy control and two cerebellar patients; modified according to [18].
Mentions: Typical examples of sway path of a healthy control participant and two cerebellar patients with and without dual tasking during condition 6 are shown in FigureĀ 1. Sway path of the control participant is short with an emphasis on anteroposterior sway during single task and slightly reduced during dual task. Anteroposterior and mediolateral sway path of the cerebellar patient is increased compared to the control during both conditions, single and dual task, and decreases during dual tasking. The last example shows sway path of a cerebellar patient before a fall with increased sway in anteroposterior and mediolateral direction during dual task.Figure 1

Bottom Line: 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.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).

View Article: PubMed Central - PubMed

Affiliation: Department of Neurology, University Hospital of Bonn, Bonn, Germany.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus