Testing a gamma-activated multiple spike-generator hypothesis for the Ia afferent

  • R. A. Auriemma
  • G. P. Moore

Abstract

For several years we have studied the input-output relations of muscle spindles and tendon organs using random length perturbations as stimuli. While studying the effect of gamma stimulation on spindle afferent responses, we made the chance observation that although static gamma fibers altered the response of a spindle Ia afferent to random length stimuli, in response to specific length sequences with concurrent gamma stimulation, the receptor produced an unexpectedly large number of spikes in exactly the same temporal relation to the repeated “random” sequence. We report here on the data obtained in one such experiment in which a gamma fiber we had classified as “static” modified the Ia afferent response to muscle stretch.

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References

  1. Auriemma, R.A. (1980). The effects of static fusimotor stimulation on the characteristics of the primary ending of mammalian muscle spindles: a study using white-noise techniques. Ph.D. Dissertation, University of Southern California.Google Scholar
  2. Fukami, Y. (1980). Interaction of impulse activities originating from individual Golgi tendon organs innervated by branches of a single axon. J. Physiol. 298, 483–499.Google Scholar
  3. Hulliger, M. & Noth, J. (1979). Static and dynamic fusimotor interaction and the possibility of multiple pace-makers operating in the cat muscle spindle. Brian Res. 173, 21–28.Google Scholar

Copyright information

© I. A. Boyd and M. H. Gladden 1985

Authors and Affiliations

  • R. A. Auriemma
  • G. P. Moore

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