Descending volley after electrical and magnetic transcranial stimulation in man

A. Berardelli, M. Inghilleri, G. Cruccu, M. Manfredi

Research output: Contribution to journalArticle

Abstract

The descending volley evoked by electrical and magnetic transcranial stimulation was recorded with spinal electrodes in 3 subjects undergoing spinal surgery. The descending volley evoked by electrical stimulation, as previously described, was composed by a short-latency initial wave followed by later waves. In two subjects magnetic stimulation evoked an initial wave of slightly longer latency (0.2-0.3 ms), smaller amplitude and higher threshold than the initial wave evoked by electrical stimulation. In these two subjects, magnetic stimuli probably activated the pyramidal axons directly. In the third subject the initial wave evoked by magnetic stimulation had a latency of 1.4 ms longer and a considerably smaller amplitude than that evoked by electrical stimulation. In this case magnetic stimulation may activate the pyramidal axons indirectly.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalNeuroscience Letters
Volume112
Issue number1
DOIs
Publication statusPublished - Apr 20 1990

Keywords

  • Motor cortex
  • Stimulation

ASJC Scopus subject areas

  • Neuroscience(all)

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