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Action potentials in slow muscle fibres of the frog during regeneration of motor nerves.

Content Provider	Scilit
Author	Schmidt, H. Stefani, E.
Copyright Year	1977
Description	Journal: The Journal of physiology 1. Pyriformis muscles of Rana temporaria were denervated by crushing the sciatic nerve inside the pelvis. At different times during regeneration of the nerve, slow muscle fibres were examined for the presence of all-or-none responses. 2. During the early period of re-innervation (35-60 days), slow muscle fibres were found to be non-selectively re-innervated by (foreign) fast-conducting motor axons. All slow fibres during this period were able to produce full sized action potentials, with overshoot. 3. Action potentials markedly decreased in amplitude and eventually disappeared completely between day 61-110 following denervation; during this period, slow muscle fibres were re-innervated by slowly-conducting motor axons. 4. Functional re-innervation by slowly-conducting motor axons, in the late stages of re-innervation, was not a necessary condition for the suppression of the action potential. Slow fibres innervated by fast motor axons, as well as denervated slow fibres, lost the action potential simultaneously with slow fibres which were re-innervated by slowly-conducting motor axons. 5. It is suggested that (small) slowly-conducting motor axons can exert a 'trophic' influence on the slow fibre membrane, independent of their synaptic function.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1353526/pdf
Ending Page	517
Page Count	11
Starting Page	507
ISSN	00223751
e-ISSN	14697793
DOI	10.1113/jphysiol.1977.sp011965
Journal	The Journal of physiology
Issue Number	2
Volume Number	270
Language	English
Publisher	Wiley-Blackwell
Publisher Date	1977-09-01
Access Restriction	Open
Subject Keyword	Journal: The Journal of physiology Developmental Biology Action Potentials Muscle Fibres Slow Muscle Motor Nerves Regeneration of Motor Potentials in Slow Frog During Regeneration
Content Type	Text
Resource Type	Article
Subject	Physiology Sports Science

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