Pflügers Archiv

, Volume 358, Issue 2, pp 189–194 | Cite as

A characterisation of spindle afferents from the intertransverse tail muscles in the rat

  • Geoffrey L. Kidd
  • Jan Kučera


The conduction velocities of myelinated afferent axons from the intersegmental muscles at the tail-base in rat range from 5.0–43.0 m · sec−1, and have a bimodal distribution with a boundary between the groups at 25.0 m · sec−1. Calculations of the dynamic indices of spindle endings, observed when stretching the muscle, show that axons from primary endings conduct at velocities above 28.0 m · sec−1 and those from secondary endings at below 24.0 m · sec−1. These characteristics resemble those of sipindles in the rat hind-limb muscles, and do not compare with thsoe in the more distally situated segmental tail muscles.

Key words

Muscle Spindle Characteristics Muscle Stretch Rat Tail Muscles 


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • Geoffrey L. Kidd
    • 1
    • 2
  • Jan Kučera
    • 1
    • 2
  1. 1.The Department of Physiology, The UniversityLiverpoolEngland
  2. 2.Department of NeurologyWashington UniversitySt. LouisU.S.A.

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