Distinction of fast fibers and slow fibers in frog abdominal muscle using certain choline esters
Gley, P.; Royet-Leblanc, M.
Comptes Rendus des Seances de la Societe de Biologie et de ses Filiales 172(2): 251-255
1978
ISSN/ISBN: 0037-9026 PMID: 150913 Document Number: 132648
We have registered the contractions of the frog's abdominal muscle in Ringer's solution. The contractions were produced either by acetylcholin or by succinyldicholin. The graphics showed that the succinyldicholin contractions were much slower than the acetylcholin ones. The tracings were not equalized by a preliminary addition of eserin. We conclude that acetylcholine excites the fast fibers and that succinyldicholin excites the slow fibers of the muscle.