[Segmental motor conduction time for abductor of the fifth finger muscle: methods and normative values]

Electrical stimulation of the ulnar nerves (60 nerves) and magnetic stimulation of the roots (C7) and motor cortex were performed on 30 normal controls. The muscle responses and F wave (peripheral stimulation) were recorded from abductor digiti minimi muscle (60 muscles). The parameters of examined potentials were measured and the central, root, peripheral motor conduction times were estimated. The normative values were established as well as formulae of linear regression within the observed correlations with height. The method may be used for electrophysiological diagnosis of patients with motor pathway impairment at the different levels.