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The Relation between Electroencephalogram and Psychogalvanic Phenomenon in Man
Author(s) -
Motokawa Kǒciti
Publication year - 1947
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1947.tb02760.x
Subject(s) - electroencephalography , stimulus (psychology) , psychology , neuroscience , stimulation , audiology , photic stimulation , cognitive psychology , visual perception , medicine , perception
Summary Electroencephalogram (EEG) and psychogalvanic phenomenon (PGP) were recorded simultaneously in the normals, Basedow‐ and causalgia patients.1 The spontaneous α‐depressions occur usually inore frequently than the spontaneous PGP, some of which. can surely be correlated with the preceding α suppressions. In some cases of causalgia, both phenomena showed one to one correspondence. 2 Both sorts of response to any stimulation become weaker as the stimulus is repeated (an adaptation effect). Adaptation is more marked for PGP than EEG. The rate of adaptation depends also on the kinds of stimuli. 3 The optic stimuli are the most effective on EEG, the least effective on PGP. The reverse is the case with the electrical stimulation of skin. Mental arithmetics and pain have strong effects on both phenomena, while the acoustic stimuli arc effective only modorately. 4 The reason why man makes use of the visual Sense for the intellectual works so extensively, was interpreted on the basis of the above findings.