spike

spike
1. A brief electrical event of 3–25 ms that gives the appearance in the electroencephalogram of a rising and falling vertical line. 2. In electrophoresis, a sharply angled upward deflection on a densitometric tracing.
- ponto-geniculo-occipital s. EEG spikes during REM sleep that arise in the pons and pass to the lateral geniculate body and occipital cortex.

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spike 'spīk n a change (as in voltage) involving a sharp increase and fall or a recording of this: as
a) the pointed element in the wave tracing in an electroencephalogram
b) a sharp increase in body temperature followed by a rapid fall <a fever with \spikes to 103°>
c ) (1) the sharp increase and fall in the recorded action potential of a stimulated nerve cell that during the increasing phase corresponds to an inrush of sodium ions to the interior of the cell and during the decreasing phase corresponds to a slowing of the influx of sodium ions and to an increasing efflux of potassium ions to the exterior (2) ACTION POTENTIAL
spike vt, spiked; spik·ing to undergo a sudden sharp increase in (temperature or fever) usu. up to an indicated level <infected patients spiked fevers as high as 105°F>

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(spīk) a sharp upward deflection in a curve, such as the main deflection of the oscillographic tracing of the action potential wave, the following smaller wave being called the after-potential. See also under potential.

Medical dictionary. 2011.

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Synonyms:
(of grain), /


Look at other dictionaries:

  • Spike — Spike(s) may refer to:Device to puncture or fasten* Nail (fastener), especially one over four inches long * Rail spike, used to construct railroad tracks * Tree spiking, making a tree dangerous to cut with a chainsaw * Spike strip, tire deflation …   Wikipedia

  • Spike — (homonymie) Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Spike est un prénom américain. En anglais, spike signifie pique, aiguille, baïonnette ou peut désigner un outil destiné à piquer. En anglais,… …   Wikipédia en Français

  • Spike — (engl. ‚Spitze‘) steht für: Spikes (Reifen), Stifte im Profil von Reifen Schuhspikes, Gleitschutz für das Gehen auf glattem Untergrund Spikes (Leichtathletik), in der Leichtathletik Schuhe mit an der Sohle angebrachten Dornen Spike (HiFi), ein… …   Deutsch Wikipedia

  • Spike TV — (a veces Spike solo) es un canal de televisión estadounidense diseñado para el publico masculino. Spike TV es propiedad de MTV Networks, que es una subsidiaria de Viacom Inc. Historia El canal comenzó como The Nashville Networks (TNN) fundado por …   Wikipedia Español

  • Spike CO — Spike (entreprise) Pour les articles homonymes, voir Spike (homonymie). Logo de Spike Siège social …   Wikipédia en Français

  • Spike — [ʃpai̮k], der; s, s: 1. 1Stift (1) an den Schuhsohlen von Läufern oder an Autoreifen, der das [Aus]gleiten verhindert: Schuhe, Autoreifen mit Spikes. 2. <Plural> Laufschuhe, an deren Sohlen sich Spikes (1) befinden: ein Paar Spikes; mit… …   Universal-Lexikon

  • spike — spike1 [spīk] n. [ME < ON spīkr, a nail, spike, or < MDu & MLowG spīker, both ult. < IE base * (s)p(h)ei , sharp, pointed splinter > SPIT1, SPOKE1, L spica, ear of grain, spina,SPINE] 1. a long, heavy nail 2. a sh …   English World dictionary

  • Spike — Spike, n. [Akin to LG. spiker, spieker, a large nail, D. spijker, Sw. spik, Dan. spiger, Icel. sp[=i]k; all perhaps from L. spica a point, an ear of grain; but in the sense of nail more likely akin to E. spoke of a wheel. Cf. {Spine}.] 1. A sort… …   The Collaborative International Dictionary of English

  • spike — spike; spike·let; spike·man; spike·nard; un·spike; hand·spike; …   English syllables

  • Spike — Spike, v. t. [imp. & p. p. {Spiked}; p. pr. & vb. n. {Spiking}.] 1. To fasten with spikes, or long, large nails; as, to spike down planks. [1913 Webster] 2. To set or furnish with spikes. [1913 Webster] 3. To fix on a spike. [R.] Young. [1913… …   The Collaborative International Dictionary of English

  • Spike — Spike, n. [Cf. G. spieke, L. spica an ear of grain. See {Spikenard}.] (Bot.) Spike lavender. See {Lavender}. [1913 Webster] {Oil of spike} (Chem.), a colorless or yellowish aromatic oil extracted from the European broad leaved lavender, or aspic… …   The Collaborative International Dictionary of English

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