Cephalic skin potentials in electroencephalography
A surface-negative transepidermal steady potential of approximately 30 mV exists in all areas of cephalic skin. Positive deflections of up to 2.5 mV may be superimposed upon this resting potential following sensory stimulation and probably reflect sweat gland activity. These phasic potential shifts...
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Published in | Electroencephalography and clinical neurophysiology Vol. 33; no. 4; pp. 419 - 424 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Ireland
Elsevier Ireland Ltd
01.10.1972
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Subjects | |
Online Access | Get full text |
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Summary: | A surface-negative transepidermal steady potential of approximately 30 mV exists in all areas of cephalic skin. Positive deflections of up to 2.5 mV may be superimposed upon this resting potential following sensory stimulation and probably reflect sweat gland activity. These phasic potential shifts may contaminate the scalp-recorded electroencephalogram markedly. Electrodermal potentials may be eliminated by puncturing the skin at the electrode site.
Un potentiel stable surface négative trans-épidermique d'approximativement 30 mV existe sur toutes les régions du cuir chevelu. Des déflexions positives supérieures à 2.5 mV peuvent se superposer à ce potentiel de repos après stimulation sensorielle et reflètent probablement l'activité des glandes sudoripares. Ces déflexions phasiques de potentiel peuvent contaminer de façon importante l'électroencéphalogramme enregistré sur le scalp. Les potentiels électrodermaux peuvent être éliminés en ponctionnant la peau au siège de l'électrode. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0013-4694 1872-6380 |
DOI: | 10.1016/0013-4694(72)90122-8 |