Information theoretic analysis of muscle spindles.

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

Research output: Contribution to journalArticlepeer-review


The information transmission properties of single, deefferented, primary muscle spindle afferents (MSAs) from the hind limb of the cat were investigated. Random stretches were delivered to the gastrocnemius medialis muscle, while recording spike trains from several MSAs near the dorsal root. Two classes of input stimuli were used: Gaussian noise with band-limited flat spectrum, and Gaussian noise with a more "naturalistic" 1/fn spectrum. The "reconstruction" method was used to calculate a lower bound to the information rate (in bit/ sec) delivered from MSAs to the spinal cord. Results show that in response to flat spectrum primary MSAs transfer information mainly about high frequencies, carrying 1.97 bits per spike. In response to naturalistic spectrum MSAs transfer information about both low and high frequencies, with "spiking efficiency" increasing to 2.99 bits per spike. A simple muscle spindle model was simulated, exemplifying the part of the intrafusal fiber mechanical properties in information transmission.

Original languageEnglish
Pages (from-to)197-200
Number of pages4
JournalActa physiologica et pharmacologica Bulgarica
Issue number3
Publication statusPublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physiology
  • Pharmacology


Dive into the research topics of 'Information theoretic analysis of muscle spindles.'. Together they form a unique fingerprint.

Cite this