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Journal of the Korean Academy of Rehabilitation Medicine 1994;18(3):21.
Quantitative EMG Analysis after Phenol Motor Point Block
Do-cheol Kweon, M.D., Geun-yeol Jo, M.D. , Insun Park, M.D.
Department of Rehabilitation Medicine, Pusan Paik Hospital, Inje University College of Medicine
페놀 차단 후 경직성 감소의 측정을 위한 근전도검사의 정량적 분석방법
권도철, 조근열, 박인선
인제대학교 의과대학 재활의학교실

A method for quantitative analysis of the electromyographic interference pattern (IP) was carried out before and after phenol motor point blocks. Clinical evaluation for the spasticity was based on Ashworth scale before and after the blocks. Eight children with cerebral palsy and two children with traumatic brain injury were studied. The number of turns per second (NT) and the mean amplitude change between successive turns (MA) were obtained with recordings from the gastrocnemius muscle with surface electrodes at constant level of voluntary contraction for 10 times. The mean percentage differences in mean NT and mean MA between blocked and pre-blocked muscle were 59.2% (P<0.01) and 22.8% (p<0.01), respectively. The mean difference in Ashworth scale was grade II (p<0.01). A better correlation was noted between the differences of NT and the differences of Ashworth scale, than between differences of mean MA and differences of Ashworth scale. The mean NT correlated well to the Ashworth scale, indicating a close correlation between the mean NT and spasticity. All of the patients after motor point block revealed decreased mean NT and Ashworth scale. We concluded that quantitative EMG analysis helps evaluation of clinical status after treatment of phenol motor point block for the spasticity.

Key Words: Phenol block, Quantitative electromyographic analysis, Spasticity


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