Reciprocal inhibition in forearm muscles in patients with essential tremor

Muscle Nerve. 1998 Jun;21(6):796-9. doi: 10.1002/(sici)1097-4598(199806)21:6<796::aid-mus13>;2-r.


Reciprocal inhibition of the H-reflex in the forearm flexor muscles was studied in 11 patients with essential tremor and in 10 normal controls. Whereas patients and controls had a similar first, disynaptic phase of reciprocal inhibition, patients had a significantly reduced second phase. Patients with more severe functional impairment had more pronounced abnormalities of reciprocal inhibition. Abnormalities of reciprocal inhibition may play a role in the pathophysiology of essential tremor and probably arise from defective suprasegmental control.

MeSH terms

  • Electromyography
  • Forearm / physiopathology*
  • H-Reflex*
  • Humans
  • Middle Aged
  • Neural Inhibition / physiology*
  • Radial Nerve / physiology
  • Tremor / physiopathology*