Table 1.

Spectral power alterations in alcoholics and detoxified patients as compared with controls

Frequency band	Subjects	Phenomenon
Theta and delta	Detoxified patients	Decrease power, especially more significant in delta band
	Alcoholics	Decrease power in frontal
Alpha	Detoxified patients	Decrease power in relapsing patients and increase power in abstaining patients
	Alcoholics	Decrease power and show lower voltage but not significant
Beta	Detoxified patients	Increase power in all scalp loci, more significant in relapsing patients and fast-beta
	Alcoholics	Increase power of slow beta in central and parietal, increase fast beta in frontal
Gamma	No confirmation about the alteration of gamma band in alcoholics