1988
DOI: 10.1007/bf01187851
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Electrophysiological and morphological study of polyneuronal innervation in the cutaneous pectoris muscle of adult frog (Rana esculenta)

Abstract: The incidence of polyneuronal innervation in the cutaneous pectoris muscle of the adult frog, Rana esculenta, was determined quantitatively using electrophysiological and morphological techniques. The mean percentages of multiple innervated endplates obtained with both techniques from a series of 19 muscles examined at all times of the year were in very good correlation: 30.7% (196/639 endplates) by electrophysiology and 30.5% (478/1569 endplates) by morphology. In nine muscles examined during the period from … Show more

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Cited by 14 publications
(11 citation statements)
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“…The histological appearance of multiple axons converging on a single junctional site has long been used as an indicator of polyneuronal innervation both in tadpoles and normal adult frogs (Letinsky and Morrison-Graham, 1980;Mallart, Angaut-Petit, Zilber-Gachelin, Tomas i Ferre, and Haimann, 1980;Werle and Herrera, 1987;Diaz and Pecot-Dechavassine, 1988). Figure l(A1 ) shows a typical example from an adult cutaneous pectoris muscle stained with the silver/cholinesterase method.…”
Section: Methods Of Estimating Polyneuronal Innervationmentioning
confidence: 99%
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“…The histological appearance of multiple axons converging on a single junctional site has long been used as an indicator of polyneuronal innervation both in tadpoles and normal adult frogs (Letinsky and Morrison-Graham, 1980;Mallart, Angaut-Petit, Zilber-Gachelin, Tomas i Ferre, and Haimann, 1980;Werle and Herrera, 1987;Diaz and Pecot-Dechavassine, 1988). Figure l(A1 ) shows a typical example from an adult cutaneous pectoris muscle stained with the silver/cholinesterase method.…”
Section: Methods Of Estimating Polyneuronal Innervationmentioning
confidence: 99%
“…The first evidence that synapse elimination does indeed occur in adult frog muscles was the finding of seasonal variation in the incidence of junctions with multiple EPP steps (Herrera and Grinnell, 1981;Herrera, 1984;Diaz and Pecot-Dechavassine, 1988) and histological signs of remodeling (Wernig, Pecot-Dechavassine, and Stover. 1980a.b;Jans, Salzmann, andWernig, 1986: Diaz andPecot-Dechavassine, 1988). For examplc, the incidence of multiple EPP steps was about twice as high in sartorius muscles of winter frogs ( 1 9%) compared with summer frogs (9%; Herrera.…”
Section: Synapse Elimination At Normal Adult Neuromuscular Junctionsmentioning
confidence: 99%
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“…We have used the frog neuromuscular junction to study synapse elimination and synaptic growth. Frogs are advantageous for this purpose because they grow throughout life (Gibbons and McCarthy, 1983 ) and retain other embryonic characteristics as adults, such as the presence of polyneuronal innervation ( Werle and Herrera, 1987;Diaz and Pecot-Dechavassine, 1988;Wernig and Herrera, 1986). Attention was focused on growth-related changes in pre-and postsynaptic size and synaptic efficacy, the distribution of polyneuronal innervation within muscles, and repeated, in vivo observation of synaptic growth and remodelling.…”
Section: Introductionmentioning
confidence: 99%