Chronaxie is the tissue-excitability parameter that permits choice of the optimum stimulus pulse duration for stimulation of any excitable tissue. Chronaxie (c) is the Lapicque descriptor of the stimulus pulse duration for a current of twice rheobasic (b) strength, which is the threshold current for an infinitely long … See more Chronaxie is the minimum time required for an electric current double the strength of the rheobase to stimulate a muscle or a neuron. Rheobase is the lowest intensity with indefinite pulse duration which just stimulated muscles … See more The terms chronaxie and rheobase were first coined in Louis Lapicque’s famous paper on Définition expérimentale de l’excitabilité that was published in 1909. The above I(d) … See more The main value of chronaxie is comparing excitability across different experiments and measurements using the same standard, thus making data comparisons easier. Electrical stimulation based on chronaxie could regulate myoD gene expression in … See more • Bursting • Calcium channels • Epithelial sodium channel • Ion channels See more An electrode is inserted into the muscle of interest, which is then stimulated using surface current. Chronaxie values increase resulting from hyperventilation can be ascribed to a … See more Chronaxie is increased in the tetany of hypoparathyroidism. It must be remembered, however, that it is the rheobase which corresponds to the x.c.c. of electrical … See more Acute intoxication of rats with aldrin decreases chronaxie, whereas chronic exposure to this chlorinated hydrocarbon insecticide has the reverse effect. Chronic exposure of rats to the closely related epoxide, dieldrin, has been suggested to reduce their … See more Webchronaxy / ( ˈkrəʊnæksɪ) / noun physiol the minimum time required for excitation of a nerve or muscle when the stimulus is double the minimum (threshold) necessary to elicit a …

chronaxie - Wiktionary

WebChronaxie definition: The minimum time necessary to excite a tissue, such as that of muscle or nerve cells, with an electric current of twice the rheobase. WebDefinition. noun, plural: chroaxies. (physiology) The shortest period of time required to produce an effective electrical stimulation such that the stimulus strength is twice the rheobase. Supplement. What happens when a cell membrane reaches threshold? When the depolarization reaches about -55 mV a neuron will fire an action potential. truth tv youtube

His bundle has a shorter chronaxie than does the adjacent

WebAug 1, 2006 · The chronaxie is related to the time constant of the directly stimulated membrane of a neuron ( Ranck 1975 ), which depends on a membrane's resistance and capacitance ( Bostock 1983; Bostock et al. 1983 ). EFFECTIVE CURRENT SPREAD USING BEHAVIORAL METHODS Spread properties WebJan 15, 2004 · The chronaxies measured with electrodes positioned near the cell body were, at most, a factor of ∼7 greater than the chronaxies measured with electrodes positioned over the axon (Fig. 2), while the refractory periods measured with electrodes positioned near the cell body were, at most, a factor of ∼10 greater than the refractory … Webalso chro·nax·y (krō′năk′sē, krŏn′ăk′-) n. pl. chro·nax·ies. The minimum interval of time necessary to electrically stimulate a muscle or nerve fiber, using twice the minimum current needed to elicit a threshold response. [French : Greek khronos, time + Greek axiā, value (from axios, worthy; see ag- in Indo-European roots ).] truth turtle