1. The act of increasing the rapidity or intensity of the physical or mental processes. 2. In neurophysiology, the complete all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of e. along the membranes of the cell or cells involved. SEE ALSO: stimulation.
- anomalous atrioventricular e. ectopic atrial beat conducted to the ventricle.

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ex·ci·ta·tion .ek-.sī-'tā-shən, .ek-sə- n EXCITEMENT: as
a) the disturbed or altered condition resulting from arousal of activity (as by neural or electrical stimulation) in an individual organ or tissue
b) the arousing of such activity

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(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.

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ex·ci·ta·tion (ek″si-taґshən) [L. excitatio, from ex out + citare to call] an act of irritation or stimulation or of responding to a stimulus; the addition of energy, as the excitation of a molecule by absorption of photons.

Medical dictionary. 2011.

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  • excitation — [ ɛksitasjɔ̃ ] n. f. • v. 1300, rare jusqu au XIXe; lat. excitatio 1 ♦ Action d exciter (qqn); ce qui excite. ⇒ encouragement, invitation. « Rien n y manque pour aggraver l émeute, ni les excitations plus vives pour la provoquer » (Taine). ⇒… …   Encyclopédie Universelle

  • Excitation — Ex ci*ta tion . [L. excitatio: cf. F. excitation.] 1. The act of exciting or putting in motion; the act of rousing up or awakening. Bacon. [1913 Webster] 2. (Physiol.) The act of producing excitement (stimulation); also, the excitement produced.… …   The Collaborative International Dictionary of English

  • Excitation — or excitement can refer to:* The excited state of an atom * The excitation (magnetic) provided with an electrical generator or alternator * in ethology, provoking of the emotional state of excitement or agitation **Psychomotor agitation **threat… …   Wikipedia

  • excitation — late 14c., from O.Fr. excitation, from L. excitationem (nom. excitatio), noun of action from pp. stem of excitare (see EXCITE (Cf. excite)) …   Etymology dictionary

  • excitation — excitation. См. возбуждение. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • excitation — index aggravation (exacerbation), dispatch (promptness), instigation, provocation Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • excitation — Excitation, Expergefactio …   Thresor de la langue françoyse

  • excitation — [ek΄sī tā′shən] n. [ME excitacioun < LL excitatio] an exciting or being excited: see EXCITE (esp. senses 4, 5, 6) …   English World dictionary

  • excitation — /ek suy tay sheuhn, si /, n. 1. the act of exciting. 2. the state of being excited. 3. Elect. a. the application of voltage to an electric device, as an electron tube circuit, an antenna, or a dynamotor, often for producing a magnetic field in… …   Universalium

  • EXCITATION — n. f. Action d’exciter. Excitation au meurtre, à la haine et au mépris du gouvernement. Excitation à la débauche. Les excitations de la presse. Il se dit aussi de l’état de ce qui est excité. L’excitation des esprits. En termes de Médecine,… …   Dictionnaire de l'Academie Francaise, 8eme edition (1935)

  • Excitation — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Sur les autres projets Wikimedia : « Excitation », sur le Wiktionnaire (dictionnaire universel) L excitation (physique), L excitation… …   Wikipédia en Français

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