Behavior of the stretch reflex in a multi-jointed limb

F. Lacquaniti, J. F. Soechting

Research output: Contribution to journalArticle

Abstract

When an external perturbation acts on a segment of a multi-jointed limb, angular motion results in all limb segments which are inertially linked to the one which is perturbed. In such a situation, different hypotheses on the functional role of the stretch reflex lead to different predictions on reflex responses by the stretched muscles. These predictions were examined experimentally and it was found that the EMG responses of elbow muscles evoked by forces applied to either the upper arm or the forearm were not uniquely related to changes in elbow angular position. They were instead correlated with the direction of changes in the net elbow torque resulting from the perturbation.

Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalBrain Research
Volume311
Issue number1
DOIs
Publication statusPublished - Oct 8 1984

Keywords

  • length feedback
  • multi-jointed limb
  • stretch reflex
  • torque feedback

ASJC Scopus subject areas

  • Developmental Biology
  • Molecular Biology
  • Clinical Neurology
  • Neuroscience(all)

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