refractory period

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refractory period

n
(Physiology) a period during which a nerve or muscle is incapable of responding to stimulation, esp immediately following a previous stimulation. In an absolute refractory period there is a total inability to respond; in an effective or relative refractory period there is a response to very large stimuli
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Noun1.refractory period - (neurology) the time after a neuron fires or a muscle fiber contracts during which a stimulus will not evoke a response
neurology - the branch of medical science that deals with the nervous system
biological time - the time of various biological processes
References in periodicals archive ?
Nugent noted that there is only a small, lucky percentage of men who have very short refractory periods and are able to get an erection and ejaculate again within minutes of their first ejaculation.
The refractory period after a ventricular complex ending a long R-R interval is longer than the refractory periods after complexes ending shorter R-R intervals.
Roughly speaking, the accepting and refractory periods can be regarded as the same.
For example, though there is no guarantee to be true ones, estimated typical accepting periods were 8-9 ms, and refractory periods were also estimated as almost the same which are within range (5-10 ms) of a text book [27].
To assess the nerve repair, the CVmax, CVmin, area and amplitude of compound muscle action potential, refractory periods (absolute and relative) and tension tests were studied.
From the observations, the electrophysiological indices such as maximum conduction velocity (CVmax), refractory period, and minimum conduction velocity (CVmin) were measured.
01 Data are presented as mean [+ or -] SD * Student t-test AERPD - atrial effective refractory periods dispersion, AVWCL - Wenckebach cycle length of A-V conduction, DM--diabetes mellitus, HLAERP--high left atrium effective refractory period, HRAERP--high right atrium effective refractory period, IACT--inter-atrial conduction time, LLAERP--low left atrium effective refractory period Table 3.
When Hansen and Ross (1983) injected rats with neurotoxins that depleted spinal synaptosomal uptake of radiolabeled noradrenalin and serotonin, they found that female rats were less sexually receptive and that male rats had longer post-ejaculatory refractory periods.
Greco has an almost anthropological fascination with the workings of his fellow man, both in and out of the sack, and there's enough going on in this book to keep the brain engaged during all those refractory periods.
Larger spermatophores seem to lead to longer refractory periods, which will result in a reduction of female mating frequency.
In the isolated rabbit heart preparations, Reiter et al (3) found that the increase of the LV volume resulted in the abbreviation of the LV effective refractory periods which was the most pronounced in the apical area.
The vagal effects mediated by acetylcholine include sinus bradycardia, atrioventricular block, shortening of the action potentials and refractory periods of atrial myocardial cells.