10.3. Electrodermal Activity, Psychophysiology
Electrodermal activity (EDA)4 signals can be compared with ECG signals. Both are due to autonomous neurogenic control of their source activity. The heart muscle generates for each heart beat currents from myocard circulating in the thorax. These currents generate potential differences that are picked up at the skin surface by ECG electrodes. In the same way, the sweat glands are under autonomous nerve control from the hypothalamus in the brain. For each EDA response, sweat glands produce a quantity of sweat that is propelled up the sweat ducts. This has two important effects: (1) High conductivity sweat brings the negative potential of the duct content in better contact with the potential reading ...
Get Bioimpedance and Bioelectricity Basics, 3rd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
