Rheobase and<unk>  are points defined on the strength-duration curve for stimulus of an excitable tissue.<unk>  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 or nerves.<unk>  is dependent on the density of voltage-gated sodium channels in the cell, which affect that cell’s excitability.<unk>  varies across different types of tissue: fast-twitch muscles have a lower<unk> , slow-twitch muscles have a higher one.<unk>  is the tissue-excitability parameter that permits choice of the optimum stimulus pulse duration for stimulation of any excitable tissue.<unk>  (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-duration stimulus pulse. Lapicque showed that these two quantities (c,b) define the strength-duration curve for current: I = b(1+c/d), where d is the pulse duration. However, there are two other electrical parameters used to describe a stimulus: energy and charge. The minimum energy occurs with a pulse duration equal to<unk> . Minimum charge (bc) occurs with an infinitely short-duration pulse. Choice of a pulse duration equal to 10c requires a current of only 10% above rheobase (b). Choice of a pulse duration of 0.1c requires a charge of 10% above the minimum charge (bc).
Chronaxie
Viropexis
Apyrexy
Polyclinic
Krebiozen
LOLAVHESLIT
Cimex
Vegetation 