The authors would like to thank Professor Ellen Jørum and her staff at the Department of Neurology and Clinical Neurophysiology, Oslo University Hospital, Oslo, Norway, for the accommodation and benevolent assistance with the QSweat measurements.
Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin
Article first published online: 28 JUL 2013
Copyright © 2013 Society for Psychophysiological Research
Volume 50, Issue 11, pages 1070–1078, November 2013
How to Cite
Tronstad, C., Kalvøy, H., Grimnes, S. and Martinsen, Ø. G. (2013), Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin. Psychophysiology, 50: 1070–1078. doi: 10.1111/psyp.12092
- Issue published online: 21 OCT 2013
- Article first published online: 28 JUL 2013
- Manuscript Accepted: 26 MAY 2013
- Manuscript Received: 27 JUN 2012
- Electrodermal activity;
- Skin potential;
- Skin conductance;
The shapes of skin conductance (SC) and skin potential (SP) responses are often similar, but can also be very different due to an unexplained cause. Using a new method to measure SC and SP simultaneously at the same electrode, this difference was investigated in a new way by comparing their temporal peak differences. SC, SP, skin susceptance (SS), and transepidermal water loss (TEWL) were recorded from 40 participants during relaxation and stress. The SP response could peak anywhere between the onset of an SC response to some time after the peak of an SC response. This peak time difference was associated with the magnitude of the SCR, the hydration of the skin, and the filling of the sweat ducts. Interpretation of the results in light of existing biophysical theories suggests that this peak difference may indicate the hydraulic capacity state of the sweat ducts at the time of a response.