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an act of irritation or stimulation; a condition of being excited or of responding to a stimulus; the addition of energy, as the excitation of a molecule by absorption of photons.
in the stimulation of muscle contraction this is the coupling which occurs at the sarcolemma-sarcoplasmic reticulum junction. Mediated by the release of calcium ions in the aqueous sarcoplasm.
conversion of an excitation stimulus into contraction of the effector muscle fiber; ionic calcium is the link between the two.
electrostimulation of a muscle by placing the electrode on its nerve.
in the stimulation of muscular contraction this is the stimulation of secretion of acetylcholine from the vesicles in the cholinergic nerve terminals into the synaptic cleft at the nerve-muscle junction.
see irritation nervous signs.