When used in neurophysiology, the term means the triggering of a conducted electrical impulse in the membrane of a muscle cell or the nerve ?bre controlling it.
n. (in neurophysiology) the triggering of a conducted impulse in the membrane of a muscle cell or nerve fibre. During excitation a polarized membrane becomes momentarily depolarized and an *action potential is set up.
n. premature electrical activation of the heart ventricles due to the presence of an *accessory pathway between atria and ventricles that conducts faster than the *atrioventricular node. See also atrioventricular reciprocating tachycardia; Wolff–Parkinson–White syndrome.... pre-excitation
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