Behavior of the stretch reflex in a multi-jointed limb

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 refl...

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Veröffentlicht in:Brain research 1984-10, Vol.311 (1), p.161-166
Hauptverfasser: Lacquaniti, F., Soechting, J.F.
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description 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.
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Arm - innervation
Biological and medical sciences
Elbow Joint - innervation
Forearm - innervation
Fundamental and applied biological sciences. Psychology
Humans
length feedback
Models, Neurological
Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration
Motor Neurons - physiology
multi-jointed limb
Muscles - innervation
Reflex, Stretch
Shoulder Joint - innervation
stretch reflex
torque feedback
Vertebrates: nervous system and sense organs
title Behavior of the stretch reflex in a multi-jointed limb
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