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Some Characteristics of Digital Vasomotor Activity
Author(s) -
Lidberg Lars,
Schalling Daisy,
Levander Sten E.
Publication year - 1972
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/j.1469-8986.1972.tb01787.x
Subject(s) - habituation , psychology , skin conductance , plethysmograph , audiology , latency (audio) , vasomotor , pulse (music) , stimulation , neuroscience , medicine , anesthesia , physics , electrical engineering , optics , detector , biomedical engineering , engineering
Size and latency of responses to a series of tones, spontaneous fluctuations, and habituation in finger volume and pulse volume were studied in 19 healthy young soldiers by means of pneumoplethysmography. The results indicate that relationships among vasomotor measures differ from those reported for skin conductance measures. Thus, in contrast to what has been shown for skin conductance, no correlation was found between habituation and number of spontaneous fluctuations, and the variability of the first response to the tones did not differ from the variability of the following responses. Auditory stimulation did not increase the number of spontaneous fluctuations. There were highly significant correlations between spontaneous fluctuations during rest and stimulation periods. No significant correlations were obtained between pulse volume responses to an arithmetic task and responses to tone stimuli. Some differences in pattern of relationships were obtained between finger and pulse volume measures. Initial responses in finger volume were related to other response size measures, whereas this was not the case for pulse volume. Response latency increased during the auditory stimulation for pulse volume, but not for finger volume.