active electrode

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either of two terminals of an electrically conducting system or cell; specifically, the uninsulated portion of a lead that is in direct contact with the body.
active electrode therapeutic electrode.
calomel electrode one capable of both collecting and giving up chloride ions in neutral or acidic aqueous media, consisting of mercury in contact with mercurous chloride; used as a reference electrode in pH measurements.
depolarizing electrode an electrode that has a resistance greater than that of the portion of the body enclosed in the circuit.
hydrogen electrode an electrode made by depositing platinum black on platinum and then allowing it to absorb hydrogen gas to saturation; used in determination of hydrogen ion concentration.
indifferent electrode one larger than a therapeutic electrode, dispersing electrical stimulation over a larger area.
point electrode an electrode having on one end a metallic point; used in applying current.
therapeutic electrode one smaller than an indifferent electrode, producing electrical stimulation in a concentrated area; called also active electrode.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ac·tive e·lec·trode

a small electrode with an exciting effect that is used to stimulate or record potentials from a localized area.
Farlex Partner Medical Dictionary © Farlex 2012

ac·tive e·lec·trode

(aktiv ē-lektrōd)
Small electrode with an exciting effect used to stimulate or record localized potentials.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
To prepare the Sn[O.sub.2]:F/Ti[O.sub.2.sup.b]/Ti[O.sub.2.sup.m] heterojunction as the active electrode of the single DSSC, the following procedure already described in [28] was performed: (a) by using the sol-gel technique, the Ti[O.sub.2.sup.b] compact layer was deposited on the transparent conductor (Sn[O.sub.2]:F) and (b) on the Sn[O.sub.2]: F/Ti[O.sub.2.sup.b] junction, screen-printing of the mesoporous Ti[O.sub.2.sup.m] layer was carried out using the paste described in the last paragraph.
Active electrode is electrodes that require no skin preparation.
Various types of active electrodes may be used for this type of test and as in full field ERGs the patient should be dilated.
For tibial nerve motor conduction velocity, an active electrode was positioned over the belly of the abductor hallucis muscle slightly beneath and in front of the navicular bone.
The inner radius of this section is an RF active electrode held at a low temperature [T.sub.c] while the outer radius is at the unaltered temperature [T.sub.basal].
For the active electrode 1 we determine potential by expression
Under the action of a tension [V.sub.set] between the two electrodes, the insulator allows the migration of Cu ions, which come from the active electrode, towards the inert electrode (see Figure 2(b) [12]).
A similar derivation, omitted for brevity, yields a partial differential equation for ion concentration dynamics over the spherical coordinate system for the active electrode particles.
Evaluations Kalkwarf et al (11), Kalkwarf et al (12) monitored the energy output at the active electrode as well as the time and depth of electrosurgery incisions in human gingiva.
In this study, the active electrode had negative polarity and was implanted onto the tibialis anterior muscle.
The active electrode and particular contacting pin, situated in the area of that electrode, are related as particular pin appears in front of the highest oscillation amplitude region, while remaining pins are situated near nodal regions.
Currents are determined by multiplying the area of the active electrode by 0.1 to 0.5 mA/[cm.sup.2] (4).

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