Premotor potential study in carpal tunnel syndrome
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Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
Published on: January 11, 2019
Mitsuhiko Kodama1, Yu Sasao, Michi Tochikura
1Department of Rehabilitation Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan. mi_jiko@fc4.so-net.ne.jp
Introduction:
Premotor potentials (PMPs) precede compound muscle action potentials evoked from the second lumbrical muscle after median nerve stimulation. Although PMP has been identified as a median sensory nerve action potential, few reports have documented the significance of PMP parameters for diagnosing carpal tunnel syndrome (CTS).
Methods:
We investigated the relationships between PMP parameters and results of 6 standard median nerve conduction studies in 74 CTS hands.
Results:
Significant correlations were noted in all comparisons. PMP conduction velocity was strongly correlated with the sensory conduction velocity between wrist and digit 2 (r(2) = 0.91). Moreover, PMP parameters were significantly correlated with neurophysiological severity of CTS.
Conclusion:
Measuring PMP parameters with a second lumbrical-interosseous study may be useful for diagnosing CTS.
