Premium
Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin
Author(s) -
Tronstad Christian,
Kalvøy Håvard,
Grimnes Sverre,
Martinsen Ørjan G.
Publication year - 2013
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12092
Subject(s) - skin conductance , transepidermal water loss , conductance , susceptance , skin temperature , chemistry , sweat , significant difference , audiology , psychology , zoology , dermatology , biomedical engineering , mathematics , medicine , stratum corneum , voltage , physics , biology , statistics , condensed matter physics , pathology , quantum mechanics
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.