Comparison of descending volleys evoked by monophasic and biphasic magnetic stimulation of the motor cortex in conscious humans

Exp Brain Res. 2001 Nov;141(1):121-7. doi: 10.1007/s002210100863.

Abstract

The descending spinal volleys evoked by monophasic and biphasic magnetic stimulation of the motor cortex were recorded from a bipolar electrode inserted into the cervical epidural space of four conscious human subjects. The results suggest that both phases of the biphasic pulse are capable of activating descending motor output. The pattern of recruitment of descending activity depends on the intensity of the stimulus and the relative threshold of each volley to each direction of current flow.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Aged
  • Electric Stimulation / methods
  • Electromagnetic Phenomena
  • Electromyography
  • Humans
  • Middle Aged
  • Motor Cortex / physiology*
  • Reaction Time / physiology