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Muscle Nerve. 2012 Dec;46(6):879-84. doi: 10.1002/mus.23424. Epub 2012 Sep 27.

Premotor potential study in carpal tunnel syndrome.

Author information

1
Department of Rehabilitation Medicine, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan. mi_jiko@fc4.so-net.ne.jp

Abstract

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.

PMID:
23018900
DOI:
10.1002/mus.23424
[Indexed for MEDLINE]
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