Chronaxies
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 WebA comparison of chronaxies for ventricular fibrillation induction, defibrillation, and cardiac stimulation: unexpected findings and their implications It may be reasonable to study whether LEC pulses from 0.25 ms to 0.30 ms in duration and up to 250 V in amplitude would increase therapeutic yield in VT termination without VF induction in humans.
Chronaxies
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WebChronaxie values are dependent on the type and size of the neuronal elements where the action potential is initiated. Axon chronaxies are generally in the range of 30–200 μs for … WebApr 14, 2024 · Assessing chronaxies of the target neural population allows for parametric optimizations that improve sensitivity [12, 19] and selectivity [10, 11, 20]. For instance, stimulating with phase durations close to chronaxie is an efficient way to minimize stimulation charge [ 13 , 19 ] Moreover, chronaxies vary across myelinated and …
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 WebBackground: Strength-duration curves for permanent His bundle (HB) pacing are potentially important for pacemaker programming. Objectives: We aimed to calculate strength-duration curves and chronaxies of the HB and of the adjacent right ventricular (RV) working myocardium and to analyze zones of selective HB capture and battery current drain …
Webnoun. chron· ax· ie ˈkrō-ˌnak-sē. ˈkrä-. variants or less commonly chronaxy. : the minimum time required for excitation of a structure (such as a neuron) by a constant electric … Webchro·nax·ie ( krō'nak-sē ), A measurement of excitability of nervous or muscular tissue; the shortest duration of an effective electrical stimulus having a strength equal to twice the …
WebLooking for chronaxies? Find out information about chronaxies. The time interval required to excite a tissue by an electric current of twice the galvanic threshold. McGraw-Hill …
Webplural of chronaxie ... Definition from Wiktionary, the free dictionary e and e towing llcWeb1 : deviation from the typical embryological sequence of formation of organs and parts as a factor in evolution 2 : irregularity in time relationships specifically : the existence of differences in chronaxies among functionally related tissue elements heterochronous -ˈräk-rə-nəs adjective Dictionary Entries Near heterochrony heterochronism e and f are respectivelyWebchro·nax·ie ( krō'nak-sē ), A measurement of excitability of nervous or muscular tissue; the shortest duration of an effective electrical stimulus having a strength equal to twice … csra motor sportsWebalso 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 ).] e and e process instrumentationWebB Distribution of chronaxies for antidromic activation. Recordings were intracellular for five neurons and extracellular for 29. The thick-line histogram corresponds to chronaxies obtained after ... e and e toolsWebPoésie française. Liens; A Propos ; Poésie; Rechercher un poème; Poèmes; Poètes; Nouveaux poèmes e and e tires san jacinto hoursWebWhat is rheobase and chronaxie? Rheobase is the lowest intensity with indefinite pulse duration which just stimulated muscles or nerves. …. Chronaxie is the tissue … e and e quality transport inc