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Pflügers Archiv

, Volume 311, Issue 2, pp 168–178 | Cite as

Die reflektorische Aktivierung prätibialer Muskelspindeln durch Spindelafferenzen

  • J. Haase
  • B. Vogel
Article

Zusammenfassung

Die Entladungsfrequenz primärer Spindelafferenzen aus den prätibialen Flexoren der Katze steigt nach i. a. Injektion von Succinylcholin in ipsilaterale Antagonisten oder kontralaterale homologe Muskeln reflektorisch an. Die Lokalanaesthesie des N. peron. der rechten Seite verhindert fusimotorische Reflexe auf der linken Seite. Außerdem sinkt die Ruheentladungsfrequenz ipsilateraler Spindelafferenzen nach Blockade des kontralateralen homologen Muskelnerven ab. Verantwortlich für die gekreuzte Aktivierung der Fusimotoneurone sind Muskelspindelafferenzen, die wahrscheinlich zur Gruppe Ia gehören.

Schlüsselwörter

Fusimotorischer Reflex Proprioceptive Aktivierung 

Reflex activity of pretibial muscle spindles induced by spindle afferents

Summary

The discharge frequency of primary spindle afferents originating in pretibial flexor muscles of the cat increases reflexly after i. a. administration of succinylcholine into ipsilateral antagonists or contralateral homologous muscles. Local anesthesia of the peroneal nerve on the right side prevents fusimotor reflexes on the left side. Furthermore it was shown that the resting discharge of ipsilateral spindle afferents decreases after blocking the contralateral homologous muscle nerve. The afferents responsible for crossed excitation of fusimotor neurones are muscle spindle afferents probably belonging to group Ia.

Key-Words

Fusimotor Reflex Proprioceptive Activation 

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Copyright information

© Springer-Verlag 1969

Authors and Affiliations

  • J. Haase
    • 1
  • B. Vogel
    • 1
  1. 1.Abteilung Pharmakologie des Max-Planck-Institutes für experimentelle MedizinGöttingen

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