Galvanic Skin Response

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galvanic skin response

[gal′van·ik ′skin ri‚späns]
(physiology)
The electrical reactions of the skin to any stimulus as detected by a sensitive galvanometer; most often used experimentally to measure the resistance of the skin to the passage of a weak electric current. Also known as electrodermal response.

Galvanic Skin Response

 

psychogalvanic reflex, a change in potential difference or electric resistance between two points on the skin in response to various stimuli or emotional excitement; first described by the Russian physiologist I. R. Tarkhanov in 1889.

Galvanic skin response is usually recorded by measuring the indexes between the palmar and dorsal surfaces of the hand or between the palmar surfaces of both hands. The galvanic skin response is a negative shift of biopotential or a decrease in electrocutaneous resistance caused by the activity of the sweat glands just before perspiration. This activity is induced by nervous impulses proceeding from the central nervous system through the sympathetic fibers. The central structures responsible for the galvanic skin response are found in the reticular formation of the mesencephalon and hypothalamus and are activated by the higher sections of the brain (chiefly the limbic system—the most important part of the brain’s emotional apparatus). The galvanic skin response is a component of the orientation reaction, that is, the response to unexpected change characterizing the processes leading to any kind of new action.

L. P. LATASH

References in periodicals archive ?
Skin conductance responses were recorded, digitized, and analyzed using the Biopac software (Biopac Systems, Inc.
Second, differences in skin conductance response bring into question what type of reaction takes place after exposure to a very low-level substance.
No significant differences or interactions were found in skin conductance response for picture size or sex.
For all stimulus presentations in Phases 3 and 4, skin conductance response (SCR) was measured during a predefined assessment interval which began with the onset of the stimulus and ended 10 s after the stimulus offset.
Finally, a 2 x 2 ANOVA (remote staring x presence of starer) analysis of the averaged skin conductance responses for the 60 administrations of the different conditions suggested that there were no significant effects for remote staring detection, F(1,19) = 1.
As the boys were exposed to more violent videos over time, their activation in brain regions concerned with emotional reactivity decreased and that was reflected in the data from the functional MRI and in the skin conductance responses," Dr.
The skin conductance responses revealed the opposite pattern.
Compared with session one responses, NACOA participants displayed EMG and skin conductance responses characteristic of habituation to every stimulus presentation during session two.
They also had electrodes attached to the fingers of their non-dominant hand to test for skin conductance responses (SCR).
On the automaticity of phobic fear: Conditioned skin conductance responses to masked phobic stimuli.
One phasic (number of skin conductance responses exceeding a threshold amplitude of .