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Transcranial direct current stimulation improves sleep in patients with post-polio syndrome
Date:8/26/2013

went a battery of tests at baseline and then three weeks later. The tests looked at quality of life, multiple aspects of fatigue, depression, and sleep quality.

The authors found that tDCS treated patients improved more than sham-treated patients on several measures of a patient health survey (the Short Form Health Survey or SF-36), including physical functioning, role limitations due to physical health, vitality, social functioning and role limitations due to emotional health. No significant differences were found between the groups on questions related to bodily pain, general health, or mental health.

One of the most noticeable effects of tDCS treatment was an improvement in sleep quality. Scores on the Pittsburgh Sleep Quality Index (PSQI) decreased 65% compared to 25% in the control group, a significant difference (p<0.05). Significant correlations were found between PSQI scores and physical functioning, social functioning, and emotional health. Interestingly, sleep quality improved more in patients who were younger when poliomyelitis developed.

Whether tDCS relieves fatigue directly is still unclear. While fatigue-related sub-items of the SF-36 improved after tDCS, no significant changes were found using specific fatigue-assessment tests such as the Piper Fatigue Scale or the Fatigue Severity Scale. No changes were noted between groups in depression scores.

"tDCS might work by improving sleep. Because changes in sleep quality affect physical and psychological states, improving sleep quality could improve perceived vitality, social and emotional functioning, and, indirectly, also fatigue," says lead investigator Laura Bertolasi, MD, Department of Neurological, Neuropsychological, Morphological and Movement Sciences, University of Verona, Italy. "tDCS effects on sleep fit in with results in healthy subjects, fibromyalgia, and schizophrenia."


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Contact: Daphne Watrin
d.watrin@iospress.nl
31-206-883-355
IOS Press
Source:Eurekalert

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