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KMID : 1211620110060030361
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Journal of the Korean Society of Physical Medicine
2011 Volume.6 No. 3 p.361 ~ p.368
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The Change of Mu Rhythm during Action Observation in People with Stroke
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Yun Tae-Won
Lee Moon-Kyu
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Abstract
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Purpose: The aims of this study was to identify the activation of the mirror neuron system during action observation in people with stroke and the difference between left hemisphere and right hemisphere and to provide possibility of the use of action observation as a clinical method for improving motor function after stroke.
Methods: Seventeen participants were asked to observe 3 different stimulation conditions for 80 seconds. A 30 second rest period was given between stimulations. Electroencephalogram(EEG) signals from electrodes on the participant’s scalp were recorded during action observation. The activation of the mirror neuron system(MNS) between the picture observation condition and action observation condition was compared with a paired t-test. An independent t-test was used to compare difference between C3 and C4 on the activation of the mirror neuron system in the action observation condition.
Results: Result of paired t-test showed a significantly decreased log ratio in the activation of the mirror neuron system in the action observation condition compared to the picture observation condition. Result of the independent t-test indicated no significant differences in the activation of the mirror neuron system in the right and left hemisphere.
Conclusion: The mirror neuron system showed greater activation in the action observation condition than in the picture observation condition and activation in the both hemisphere during action observation. We conclude that these findings suggest that this may possibly be an efficient clinical intervention method for improving motor function.
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KEYWORD
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Action observation, Mirror neuron system, Mu rhythm, Stroke
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