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EMG H-reflex

An electromyograph (EMG) technique measuring the time required for a stimulus to propagate orthodromically up group 1A sensory fibers to the spinal cord, through a monosynaptic connection with an alpha motor neuron, the return orthodromically down the alpha motor neuron. In connection with the F-response, recognition of abnormal conduction velocity in peripheral neuropathy is 80-90%. Conduction block in proximal nerve segments in inflammatory or demyelinating neuropathies may also be demonstrated.

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electromyography (EMG)

References

  1. Harrison's Principles of Internal Medicine, 13th ed. Companion Handbook, Isselbacher et al (eds), McGraw-Hill Inc. NY, 1995, pg 694-95
  2. nlmpubs.nlm.nih.gov/hstat/ahcpr/