Short-latency somatosensory evoked potentials in myotonic dystrophy: evidence for a conduction disturbance.

Short-latency somatosensory evoked potentials were recorded in 13 patients with myotonic dystrophy (MyD). The MyD were compared with age-matched controls. The mean conduction latency between the brachial plexus and dorsal column nuclei (EP-N14) was significantly longer for the MyD. Results suggest an afferent conduction disturbance in MyD.