The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Comparison of Cortical Activation between Tactile Stimulation and Two-point Discrimination: An fMRI Case Study

촉각 자극과 두점식별 자극에 따른 뇌활성도 분석: fMRI 사례 연구

  • Park, Ji-Won (Department of Physical Therapy, College of Medical Science, Catholic University of Daegu) ;
  • Kim, Chung-Sun (Department of Physical Therapy, College of Rehabilitation, Daegu University)
  • 박지원 (대구가톨릭대학교 의료과학대학 물리치료학과) ;
  • 김중선 (대구대학교 재활과학대학 물리치료학과)
  • Received : 2010.06.15
  • Accepted : 2010.08.16
  • Published : 2010.08.25
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Abstract

Purpose: Sensory input is very important for proper performance of human. Two-point discrimination is the most widely used tactile sensory test. The purpose of this study was to find the changes in cortical activation patterns between tactile stimulation and two-point discrimination. Methods: Two healthy subjects participated in our study. fMRI scanning was done during 4 repeated blocks of tactile stimulation and two point discrimination of the right index finger tip. In one block, stimuli were repeated 10 times every three seconds. To determine the changes of cortical neurons during sensory input, intensity index was analyzed. Results: When tactile stimulation of the right index finger tip was completed, only contralateral primary somatosensory area was activated. In contrast, during two-point discrimination, both the primary somatosensory area and ipsilateral supplementary sensory area were activated. Conclusion: During two point discrimination, both primary somatosensory area and ipsilateral supplementary sensory area were activated. Therefore, two-point discrimination is required more complex and conscious activity than tactile stimulation.

Keywords

References

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