Since March 1580 to Jan, 1984, 11.1 cases of L5 and S1 radiculopathies who were diagnosed by electromyography at Dept. of Rehabilitation Medicine, Seoul National University Hospital, was analaysed in retrospective study.
Our aim in this study was the usefulness of tibialis posterior muscle in radiculopathies. Our results obtationed were as follows.
1) Among the 111 cases, 65 cases(58, 6/) were electromyographically positive findings in both anterior and posterior rami, 46 .cases(41. 4 j) were positive findings in only anterior rami.
2) L 5 radiculopathies were markedly predominant than S I radiculopathies in spite of pure or mixed pattern.
3) In L5 radiculopathies, tibialis posterior muscle was the most sensitive muscle in electromyographic findings and in S 1 radiculopathies, abductor hallucis muscle was the most sensitive one.
4) The tibialis posterior muscle was more sensitive in pure L 5 radiculopathies compared to pure S 1 radiculopathies.
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