Journal
JOURNAL OF NEUROSCIENCE METHODS
Volume 190, Issue 1, Pages 80-91Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jneumeth.2010.04.028
Keywords
EDA; SC; GSR; Deconvolution; Decomposition; Phasic; Tonic; Integration; Sudomotor activity
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Funding
- Austrian Science Fund (FWF) [P19276]
- Austrian Science Fund (FWF) [P19276] Funding Source: Austrian Science Fund (FWF)
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Electrodermal activity is characterized by the superposition of what appear to be single distinct skin conductance responses (SCRs). Classic trough-to-peak analysis of these responses is impeded by their apparent superposition. A deconvolution approach is proposed, which separates SC data into continuous signals of tonic and phasic activity. The resulting phasic activity shows a zero baseline, and overlapping SCRs are represented by predominantly distinct, compact impulses showing an average duration of less than 2s. A time integration of the continuous measure of phasic activity is proposed as a straightforward indicator of event-related sympathetic activity. The quality and benefit of the proposed measure is demonstrated in an experiment with short interstimulus intervals as well as by means of a simulation study. The advances compared to previous decomposition methods are discussed. (C) 2010 Elsevier B.V. All rights reserved.
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