Abstract
Contractile activity of damaged neuronal axons of Lymnaea stagnalis and Planorbis corneus vulgaris mollusks and the possibility of inhibiting their retraction by cytochalasin B were studied. In experimental series I (control), the neuronal axons contracted in Ringer's fluid in 90% cases. In series II and III (cytochalasin B in concentrations of 0.02 and 0.2 mM), the percentage of non-contracting neurons was 50 and 70%, respectively. Presumably, the fiber retraction mechanism was involved in the formation of diastasis after nerve cutting and damage to conduction tracts. The nerve diastasis formed at the expense of not only elastic characteristics of the nerve sheath and glia, but also due to nerve fiber retraction. Experiments with cytochalasin B demonstrated that F-actin filaments were involved in the retraction of myelin-free nerve fibers.
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