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Photic Driving of EEG Alpha Activity in Recovering Cocaine‐Dependent and Alcohol‐Dependent Patients
Author(s) -
Bauer Lance O.
Publication year - 1994
Publication title -
the american journal on addictions
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.997
H-Index - 76
eISSN - 1521-0391
pISSN - 1055-0496
DOI - 10.1111/j.1521-0391.1994.tb00226.x
Subject(s) - photic stimulation , electroencephalography , alpha (finance) , stimulation , audiology , stimulus (psychology) , psychology , abstinence , neuroscience , medicine , anesthesia , developmental psychology , psychiatry , visual perception , cognitive psychology , construct validity , perception , psychometrics
Electroencephalographic (EEG) activity was evaluated in nine cocaine‐dependent and five alcohol‐dependent patients after 1, 3, and 12 weeks of verified abstinence. A group of 15 non‐drug‐dependent control subjects were evaluated after comparable intervals. The EEG was recorded from posterior lead sites during an eyes‐open resting condition and during square‐wave photic stimulation delivered at two different intensities. The stimulation rate was set relative to each subject's dominant alpha frequency at rest. Analyses revealed no significant group differences in resting EEG activity in the standard frequency bands. However analyses of power at the dominant alpha frequency revealed a reliable increase as stimulus intensity was increased, but only in the control group. The cocaine‐dependent and alcohol‐dependent groups exhibited no evidence of a photic driving response at any of the three time points. (American Journal on Addictions 1994; 3:49–57)