Abstract
DATA have been reported which show a high positive correlation between the impulse of the isometric reflex contraction (area under the myogram) and the impulse of the synchronous muscle action potential (area of the diphasic spikes of the electromyogram) recorded from surface electrodes during a phasic stretch reflex in normal human subjects1. An explanation for this relationship was given in terms of consistency of gamma efferent control of muscle spindle sensitivity because the influence of supra-spinal centres of the central nervous system was reduced by (a) having the subjects well trained in Jacob-son's method of mental and physical relaxation2 and (b) conducting the experiments in a sound-proofed, electrically shielded and thermally insulated room3 to reduce sensory stimulation which can activate reticular neurones and augment gamma discharge.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Clarke, A. M., Nature, 208, 551 (1965).
Jacobson, E., J. Nerv. Ment. Dis., 60, 568 (1924).
Clarke, A. M., Austral. J. Psychol., 17, 124 (1965).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
CLARKE, A. Relationship between the Electromyogram and Isometric Reflex Response in Pre-strain Conditions in Normal Humans. Nature 214, 1114–1115 (1967). https://doi.org/10.1038/2141114a0
Issue Date:
DOI: https://doi.org/10.1038/2141114a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.