Tactile Perception for Stroke Induce Changes in Electroencephalography.
Si-Nae Ahn, Jeong-Weon Lee, Sujin Hwang
PMID 30186061WHAT IT FOUND
Active touch raised brain-wave activity more than passive touch in people with left-hemisphere stroke, especially right prefrontal and parietal areas.
Right-hemisphere stroke showed no clear difference. This was a brain-wave lab finding, not a functional outcome.
Key findings
01In participants with left hemispheric damage, active tactile exploration produced significantly higher sensory motor rhythm relative power in the right prefrontal and parietal areas than passive exploration (p=.010).
02In participants with right hemispheric damage, no brain area showed a significant difference between active and passive tactile exploration.
STILL TO COME
How it was doneWhat they foundWhat it means for OTs
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What it does not show
Only 20 people took part, so the findings are limited. Participants had to be at least 1 year post stroke, score 23 or more on MMSE, and be Brunnstrom stage 3 or higher, so results may not apply to very early stroke or severe cognitive or hand impairment. The study did not measure subjective or behavioural responses after each trial, so attention may have varied. The study measured EEG brain-wave activity only, not functional outcomes.
The easy way to misread this
Do not read the EEG changes as proof that active touch improves stroke function. The study measured only brain-wave activity, not daily performance or behavioural responses.