Correlation of Electrical and Mechanical Activity of Holothurian Muscle | Zendy

R. Blake Hill | Zendy

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Correlation of Electrical and Mechanical Activity of Holothurian Muscle

Author(s) -

R. Blake Hill

Publication year - 1987

Publication title -

journal of experimental biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.367

H-Index - 185

eISSN - 1477-9145

pISSN - 0022-0949

DOI - 10.1242/jeb.130.1.331

Subject(s) - depolarization , muscle contracture , contraction (grammar) , contractility , acetylcholine , muscle contraction , biophysics , caffeine , chemistry , neuroscience , biology , anatomy , endocrinology

1. Spontaneous contractions of segments of an isolated longitudinal muscle of Holothuna cinerascens are not propagated across a sucrose gap. Asynchronous spiking and spontaneous depolarizations leading to contraction can be recorded independently on each side of the gap. 2. Caffeine-induced contractures are not the result of depolarization. 3. Depolarization with KCl temporarily restores contractility lost in a series of caffeine-induced contractures. 4. Acetylcholine causes a depolarization which induces contraction. 5. Individual muscle units may spike quite independently as depolarization progresses in a spontaneous contraction.

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