Topography and sources of electromagnetic cerebral responses to electrical and air-puff stimulation of the hand

P. M. Rossini, G. Deuschl, V. Pizzella, F. Tecchio, A. Pasquarelli, E. Feifel, G. L. Romani, C. H. Lücking

Research output: Contribution to journalArticlepeer-review

Abstract

SEPs and SEFs after air-puff stimulation of index and little fingers have been studied and compared to the responses following electrical stimulation of the same digits and of the median nerve at the wrist in 5 subjects. The differences in morphology of the evoked signals are described and the generator characteristics are analysed for SEFs by means of a moving dipole model inside a homogeneous sphere. In our measurements the magnetic fields following electrical finger stimulation show a 30 msec component, which was absent following air-puff stimulation. This could not be seen in the electric field activity, The generators of the first component of SEFs after air-puff finger stimulation proved to be deeper (8 mm on average across all subjects and for both fingers) than in the case of electrically evoked SEFs. A similar behaviour was also observed for the second component of SEFs for the 2 stimulus modalities.

Original languageEnglish
Pages (from-to)229-239
Number of pages11
JournalElectroencephalography and Clinical Neurophysiology - Evoked Potentials
Volume100
Issue number3
DOIs
Publication statusPublished - 1996

Keywords

  • Air-puff finger stimulation
  • Electrical hand stimulation
  • Somatosensory evoked fields
  • Somatosensory evoked potentials

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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