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Journal of the Korean Academy of Rehabilitation Medicine 1996;20(4):17.
Paracervical Motor Unit Characteristics using Monopolar Needle Electrode
Eun Sook Park, M.D., Joong Son Chon, M.D., Sae Il Chun, M.D., Seung Hyun Park, M.D., Seong Ho Jang, M.D. , Hye Jung Su, M.D.
Department of Rehabilitation Medicine, Yonsei University College of Medicine
경추부 척추주위근에서 단극침전극 검사시 운동단위활동전위의 특성
박은숙, 전중선, 전세일, 박승현, 장성호, 서혜정
연세대학교 의과대학 재활의학교실 및 연세 동서의학 연구소

Motor unit characteristics (amplitude, area, duration, phase, turn and polyphasic MUAP) were measured using a monopolar needle and narrow bandpass (500Hz to 10kHz) in paracervical muscles in 51 subjects (26 men and 25 women) aged from 18 to 66 years (mean age, 39.14 years). Motor unit action potentials (MUAP) were analyzed with the decomposition method.

1) Mean values of MUAP parameters were as follows: amplitude 745.24±295.19μV, area 491.51±218.23μVms, duration 4.14±0.56msec, phase 3.48±0.35, turn 3.18±0.49, polyphasic 14.28±11.49%.

2) Mean values of amplitude and area were significantly higher in men than in women (P<0.01).

3) Mean values of MUAP parameters of paracervical levels were not significantly different.

4) MUAP parameters showed no significant correlation with age.

Paracervical MUAP analysis can be used to increase the diagnostic yield.

Key Words: Motor unit action potential, Decomposition


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