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KMID : 0376119950220020281
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Medical Journal of the Red Cross Hospital
1995 Volume.22 No. 2 p.281 ~ p.286
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Clinical Usefulness of H-reflex in the Diagnosis of Lumbar Radiculopathy
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Abstract
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Electromyography is most electrophysiological study in the evaluation of lumbar compressive radiculopathy. However, electromyography may not be useful in mild motor root compressions without significant axon loss, in the initial 2~3 weeks of
severe
motor root compressions with axon damage and in pure or mainly sensory root compressions.
In fact, signs of sensory fiber compromise alone are the most frequently observed in radiculopathy. After that, signs of both motor and sensory fibers and signs of isolated motor fiber dysfunction are following in descending order. The validity
of
using
the H-reflex of study the integrity and conduction of the spinal monosynaptic reflex are has been documented.
We measured modified H-reflex test from tibialis anterior an peroneus longus muscle to diagnose the 5th lumbar radiculopathy against a sample of 20 normal adults and 30 patients with clinical and radiological evidence of 5th lumbar radicular
compression, and got the following results and conclusions.
1) Abnormalities of modified H-reflex from peroneus longus muscle in patient group are 60% (18/30). Therefore, the modified H-reflex study from preoneus longus muscle is more sensitive than that study from tibialis anterior muscle for the
diagnosis of
the 5th lumbar radiculopathy.
2) Abnormalities of modified H-reflex stud from tibialis anterior and peroneus longus muscles in patient group with positive findings of only paravertebral muscles in electromyography are 50%(3/6).
3) We concluded that modified H-reflex study from tibialis anterior and peroneus longus muscles accompanied with electromyography would be useful in the diagnosis of the 5th lumbar radiculopathy.
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