Cortical contributions to the stretch reflex response in biceps brachii

M. A. Krutky, E. J. Perreault, G. N. Lewis, C. D. MacKinnon

Research output: Contribution to journalConference articlepeer-review

Abstract

Long-latency components of the stretch reflex may aid in organizing multi-joint movements and posture. The aims of this study were to investigate if the M2 response in biceps brachii is mediated through a trans-cortical pathway. Ipsi-lateral and contra-lateral transcranial magnetic stimulation, combined with a variety of ramp-and-hold perturbations in which the subject was instructed to either intervene or not resist were applied to biceps brachii. The biceps M2 response modulates with task and can be facilitated through contra-lateral TMS. This is consistent with the existence of a trans-cortical pathway. Attempts to inhibit this pathway, possibly affecting the long-latency stretch reflex have not yet produced consistent results.

Original languageEnglish (US)
Pages (from-to)4673-4676
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume26 VII
StatePublished - Dec 1 2004
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: Sep 1 2004Sep 5 2004

Keywords

  • Biceps brachii
  • Facilitation
  • Inhibition
  • M1
  • M2
  • Perturbation
  • Stretch reflex
  • TMS

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