The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Comparison of the Activity of Cortical Neurons According to Muscle Contraction Type between Post Stroke Hemiplegic Subjects and Healthy Subjects

뇌졸중 환자와 정상인의 근 수축 유형에 따른 피질 신경원의 활성도 비교

  • Yang, Ga-Ae (Department of Physical Therapy, Graduate School of Dong shin University) ;
  • Kim, Su-Hyon (Department of Physical Therapy, Graduate School of Dong shin University) ;
  • Lim, Yong-Eun (Department of Physical Therapy, Nam Dong Rehabilitation Community Center) ;
  • Lee, Dong-Geol (Department of Physical Therapy, Graduate School of Dong shin University) ;
  • Kim, Tae-Youl (Department of Physical Therapy, Dong Shin University)
  • 양가애 (동신대학교대학원 물리치료학과) ;
  • 김수현 (동신대학교대학원 물리치료학과) ;
  • 임영은 (남동장애인복지관 물리치료실) ;
  • 이동걸 (동신대학교대학원 물리치료학과) ;
  • 김태열 (동신대학교 물리치료학과)
  • Published : 2009.03.25
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Abstract

Purpose: In order to examine difference in the activity of potential of spinal neurons and cortical neurons according to muscle contraction type in post stroke hemiplegic subjects and healthy subjects, the present study conducted an experiment as follows. Methods: The subjects in the experimental group were 17 left-side hemiplegic subjects (9 female, 8 male; mean age, 63.41$\pm$9.86 years) with the right hand as the dominant hand selected among post stroke hemiplegic subjects, and 17 age matched healthy control subjects (10 female, 7 male; mean age, 64.12$\pm$12.07 years). Movement-related cortical potentials (MRCPs) were measured using surface electromyography and electroencephalography while concentric and eccentric movements were made alternately. Results: As to the pattern of the activity of MRCP, which indicates the activity of motor cortical neurons, we found that the amplitude is high (p<0.01), the length of excitement is short (p<0.01) and the ascending gradient of amplitude to the peak increases (p<0.05) in post stroke hemiplegic subjects' lesion sites different from healthy subjects. Conclusion: The activity of cortical neurons was no difference in activity according to contraction type was observed in post stroke hemiplegic subjects' lesion sites. This suggests that there is no distinction in the activity of cortical neurons between concentric contraction and eccentric contraction. Accordingly, if post stroke hemiplegic subjects' activity of motor cortex is analyzed by measuring MRCPs, it is considered useful in research on neural plasticity or as a ground of clinical effects in the area of physical therapy for the central nervous system.

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References

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