Limits...
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

Number of falls of patients during single and dual task conditions for all stance conditions (given as mean values with standard deviation); modified according to [18]. Number of falls of cerebellar patients is marked green (dark green single and light green dual task).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig3: Number of falls of patients during single and dual task conditions for all stance conditions (given as mean values with standard deviation); modified according to [18]. Number of falls of cerebellar patients is marked green (dark green single and light green dual task).

Mentions: The number of falls in all trials and conditions were counted per patient. Frequency of falls was different between conditions (p < 0.001; effect of condition; 2 Groups (controls vs. cerebellar) x 2 Sets (single vs. dual task) x 6 Sway Conditions (6 SOT conditions) ANOVA) and significantly higher in the patients’ group (p < 0.001; group effect): While there was only one fall in condition 5 in the control group, falls were frequent in the patient group (43 falls during single task, 50 falls during dual task conditions), mainly during conditions 5 and 6 (86 of 93 falls) (Figure 3). In cerebellar patients dual tasking also increased the risk of falls with increasing difficulty of the conditions (p < 0.001; group by dual task by condition interaction).Figure 3


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)

Number of falls of patients during single and dual task conditions for all stance conditions (given as mean values with standard deviation); modified according to [18]. Number of falls of cerebellar patients is marked green (dark green single and light green dual task).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig3: Number of falls of patients during single and dual task conditions for all stance conditions (given as mean values with standard deviation); modified according to [18]. Number of falls of cerebellar patients is marked green (dark green single and light green dual task).
Mentions: The number of falls in all trials and conditions were counted per patient. Frequency of falls was different between conditions (p < 0.001; effect of condition; 2 Groups (controls vs. cerebellar) x 2 Sets (single vs. dual task) x 6 Sway Conditions (6 SOT conditions) ANOVA) and significantly higher in the patients’ group (p < 0.001; group effect): While there was only one fall in condition 5 in the control group, falls were frequent in the patient group (43 falls during single task, 50 falls during dual task conditions), mainly during conditions 5 and 6 (86 of 93 falls) (Figure 3). In cerebellar patients dual tasking also increased the risk of falls with increasing difficulty of the conditions (p < 0.001; group by dual task by condition interaction).Figure 3

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