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excitation |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
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excitation /ex·ci·ta·tion/ (ek?si-ta´shun) 1. irritation or stimulation. 2. the addition of energy, such as excitation of a molecule by absorption of photons. direct excitation electrostimulation of a muscle by placing the electrode on the muscle itself. indirect excitation electrostimulation of a muscle by placing the electrode on its nerve.
excitation (eksītā´sh n the addition of energy to a system, thereby transferring it from its ground state to an excited state. excitation 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. excitation-conduction-contraction 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. excitation-contraction coupling conversion of an excitation stimulus into contraction of the effector muscle fiber; ionic calcium is the link between the two. indirect excitation electrostimulation of a muscle by placing the electrode on its nerve. excitation-secretion 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. excitation signs see irritation nervous signs. |
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