The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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The Difference of Cortical Activation Pattern According to Motor Learning in Dominant and Non.dominant Hand: An fMRI Case Study

우성과 비우성 손에서의 운동학습으로 나타나는 뇌 활성도 차이: fMRI 사례 연구

  • Park, Ji-Won (Department of Physical Therapy, College of Health Science, Catholic University of Daegu) ;
  • Jang, Sung-Ho (Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University)
  • 박지원 (대구가톨릭대학교 보건과학대학 물리치료학과) ;
  • 장성호 (영남대학교의료원 재활의학과)
  • Published : 2009.03.25
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Abstract

Purpose: Human brain was lateralized to dominant or non-dominant hemisphere, and could be reorganized by the processing of the motor learning. We reported four cases which showed the changes of the cortical activation patterns resulting from two weeks of training with the serial reaction time task. Methods: Four right-handed healthy subjects were recruited, who was equally divided to two training conditions (right hand training or left hand training). They were assigned to train the serial reaction time task for two weeks, which should press the corresponding four colored buttons as fast as accurately as possible when visual stimulus was presented. Before and after two weeks of training, reaction time and function magnetic resonance image (fMRI) was acquired during the performance of the same serial reaction time task as the training. Results: The reaction time was significantly decreased in all of subjects after training. Our fMRI result showed that widespread bilateral activation at the pre scanning was shifted toward the focused activation on the contralateral hemisphere with progressive motor learning. However, the bilateral activation was still remained during the performance of the non-dominant hand. Conclusion: These findings showed that the repetitive practice of the serial reaction time task led to increase the movement speed and accuracy, as described by motor learning. Such motor learning induced to change the cortical activation pattern. And, the changed pattern of the cortical activation resulting from motor learning was different each other in accordance with the hand dominance.

Keywords

References

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