Estimation of muscle spindle information rate by pattern matching and effects of the fusimotor system

Y. Tock, Y. Steinberg, G. F. Inbar, M. Ljubisavljevic, J. Thunberg, U. Windhorst, H. Johansson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The information transmission properties of ensembles of muscle spindles (MSs) and the effect of the motor muscle spindle innervation (fusimotor or gamma system) on these properties were studied. A random stimulus was applied to a muscle in the hind limb of a cat, while spike trains from several MSs were recorded simultaneously. The stimulus was administered twice, with an operative and a disconnected gamma system. The Shannon information rate between the stimulus and spike trains, as well as other information theoretic measures, were estimated. The estimation method was based upon the sliding window Lempel-Ziv algorithm with an extension to the conditional case. The information rate of ensembles of MSs increased with increasing ensemble size. However, with an operative gamma system, the "ensemble effect" was much higher. In addition, the ensemble effect was influenced by the stimulus spectrum. The results indicate that the gamma system has an important role in enhancing information transmission from ensembles of MSs to the spinal cord.

Original languageEnglish
Title of host publicationConference Proceedings - 1st International IEEE EMBS Conference on Neural Engineering
EditorsLaura J. Wolf, Jodi L. Strock
PublisherIEEE Computer Society
Pages51-54
Number of pages4
ISBN (Electronic)0780375793
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event1st International IEEE EMBS Conference on Neural Engineering - Capri Island, Italy
Duration: Mar 20 2003Mar 22 2003

Publication series

NameInternational IEEE/EMBS Conference on Neural Engineering, NER
Volume2003-January
ISSN (Print)1948-3546
ISSN (Electronic)1948-3554

Other

Other1st International IEEE EMBS Conference on Neural Engineering
Country/TerritoryItaly
CityCapri Island
Period3/20/033/22/03

Keywords

  • Central nervous system
  • Delay
  • Entropy
  • Estimation theory
  • Information rates
  • Muscles
  • Musculoskeletal system
  • Pattern matching
  • Probability distribution
  • Spinal cord

ASJC Scopus subject areas

  • Artificial Intelligence
  • Mechanical Engineering

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