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KMID : 1211620100050030467
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Journal of the Korean Society of Physical Medicine
2010 Volume.5 No. 3 p.467 ~ p.476
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Analysis of Brain Activation due to Mouth Shape during Grip Movement
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Shim Je-Myung
Kim Hwan-Hee
Kim Chung-Sun
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Abstract
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Purpose: This study was performed to understand the relationship between hand and mouth shapes using functional magnetic resonance imaging(fMRI).
Methods: Two healthy volunteers without any previous history of physical or neurological illness were recruited. fMRI was done that volunteers was 6 repeated of natural mouth, close mouth and open mouth while power grip and pinch grip movement.
Results: Cerebral cortex activation was not well observed for the natural mouth during the power grip exercise. For the closed mouth, the temporal lobe, Broca’s area, the prefrontal area related to thinking and judgment, the supplementary motor area, the auditory area and Wernicke’s area were activated. For the open mouth, cortical activation was also observed in the temporal lobe, Wernicke’s area, the prefrontal area related to thinking and the orbital frontal area related to visual sense. During the pinch grip exercise, cortical activation was observed for the natural mouth in the primary sensory area, Wernicke’s area, the primary and supplementary motor area, and the prefrontal area. For the closed mouth, cortical activation was observed in the temporal lobe, Wernicke’s area, the prefrontal area related to thinking, the secondary visual area, the primary sensory area and the supplementary motor area. In the case of the open mouth, cortical activation was observed in a few parts in the temporal lobe as well as Wernicke’s area, the prefrontal area related to thinking, and other areas related to visual sense such as the primary visual area, the secondary visual area and the visual association area.
Conclusion: Brain was more activation for close mouth and open mouth more than natural mouth movement.
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KEYWORD
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Brain activation, Power grip, Pinch grip, Mouth shape
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