rheobase


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Related to rheobase: utilization time

rheobase

 [re´o-bās]
the minimal electric current of infinite duration necessary to produce a twitch in a muscle. In a strength-duration curve for muscle stimulation, it is the voltage at which there is no further decrease in threshold when the pulse width or duration is increased.

rhe·o·base

(rē'ō-bās),
The minimal strength of an electrical stimulus of indefinite duration that is able to cause excitation of a tissue, for example, muscle or nerve.
See also: chronaxie.
Synonym(s): galvanic threshold
[rheo- + G. basis, a base]

rheobase

(rē′ō-bās′)
n.
The minimal strength of an electrical stimulus that is able to cause excitation of a tissue, such as a muscle.

rhe′o·ba′sic adj.

rhe·o·base

(rē'ō-bās)
The minimal strength of an electrical stimulus of indefinite duration that is able to cause excitation of a tissue, e.g., muscle or nerve.
See also: chronaxie
[rheo- + G. basis, a base]
References in periodicals archive ?
Strengthduration curves with voltage square wave stimulation were used to determine rheobase and chronaxy.
Two parameters related to excitability were measured: rheobase and chronaxy.
The chronaxie and rheobase values were compared using a two-tailed Student t-test between the following: median and ulnar nerves, male and female subjects for each nerve, and different sessions for each repeated subject.
The rheobase voltage ranged from 6.8 to 26.7 V for the median nerve and from 14.8 to 32.7 V for the ulnar nerve.
This effect was shown by the experimental analysis that quantified several electrophysiological parameters of sciatic nerve CAP, such as PPA, conduction velocity, rheobase and chronaxie.
The changes that EOLs and thymol made on rheobase and chronaxie (parameters more directly related to nerve excitability) show that they reduce neuronal excitability, which might indicate a possible potential for local anesthesia use.
The electrophysiological parameters PPA, conduction velocity of CAP first and second components, rheobase, and chronaxy were analyzed after nerve stabilization and the control values were 7.1 [+ or -] 0.27 mV, 85.4 [+ or -] 2.34 m/s, 30.8 [+ or -] 1.11 m/s, 3.4 [+ or -] 0.22 V, and 51.5 [+ or -] 2.34 ms (n=87), respectively.
The nerve excitability was assessed by the quantification of rheobase and chronaxy parameters.
Parameters [N.sub.0] [N.sub.inf] (n = 56) (n=44) Resting -57.3 [+ or -] 1.1 -55.5 [+ or -] 1.6 potential (mV) Input resistance 17.6 [+ or -] 1.4 54.7 [+ or -] 10.5 * (M[OMEGA]) Rheobase (pA) 1570.9 [+ or -] 119.0 1352.5 [+ or -] 162.1 dV/[dt.sub.