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KMID : 1211620120070010011
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Journal of the Korean Society of Physical Medicine
2012 Volume.7 No. 1 p.11 ~ p.20
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Effects of Repetitive Transcranial Magnetic Stimulation on Enhancement of Cognitive Function in Focal Ischemic Stroke Rat Model
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Lee Jung-In
Kim Gye-Yeop
Nam Ki-Won
Lee Dong-Woo
Kim Kyung-Yoon
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Abstract
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Purpose: This study is intended to examine the repetitive transcranial magnetic stimulation on cognitive function in the focal ischemic stroke rat model.
Methods: This study selected 30 Sprague-Dawley rats of 8 weeks. The groups were divided into two groups and assigned 15 rats to each group. Control group: Non-treatment after injured by focal ischemic stroke; Experimental group: application of repetitive transcranial magnetic stimulation(0.1 Tesla, 25 Hz, 20 min/time, 2 times/day, 5 days/2 week) after injured by focal ischemic stroke. To assess the effect of rTMS, the passive avoidance test, spatial learning and memory ability test were analyzed at the pre, 1 day, day, day and immunohistochemistric response of BDNF were analyzed in the hippocampal dentate gyrus at day, day.
Results: In passive avoidance test, the outcome of experimental group was different significantly than the control group at the day, day. In spatial learning and memory ability test, the outcome of experimental group was different significantly than the control group at the day, day. In immunohistochemistric response of BDNF in the hippocampal dentate gyrus, experimental groups was more increased than control group.
Conclusion: These result suggest that improved cognitive function by repetitive transcranial magnetic stimulation after focal ischemic stroke is associated with dynamically altered expression of BDNF in hippocampal dentate gyrus and that is related with synaptic plasticity.
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KEYWORD
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Focal ischemic stroke, rTMS, Cognitive function, BDNF
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