title: EEG sleep activities react topographically different to GABAergic sleep modulation by flunitrazepam: relationship to regional distribution of benzodiazepine receptor subtypes?
abstract: Spectral analysis was performed to study the response of various EEG sleep activities to a modification of GABAergic sleep regulation by flunitrazepam. We observed sleep stage- and sleep cycle-dependent differences in the topographic distribution of the reactions. An increase in power density was found in the frontal regions for the alpha 2 and sigma 1 frequency band whereas a decrease in power density was emphasized in the posterior regions for the delta and alpha 1 frequency band. These topographic differences might be related to the regional distribution of benzodiazepine receptor subtypes.
authors.affiliation: Abteilung für klinische Neurophysiologie, Universitätsklinikum Rudolf Virchow, Freie Universität Berlin, BRD.
authors.forename: W
authors.initials: W
authors.lastname: Scheuler
mesh_terms: D000328:Adult; D001921:Brain / Q000187:drug effects / Q000502:physiology*; D001923:Brain Chemistry / Q000502:physiology; D001931:Brain Mapping; D004311:Double-Blind Method; D004569:Electroencephalography / Q000187:drug effects; D005260:Female; D005445:Flunitrazepam / Q000494:pharmacology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011897:Random Allocation; D011963:Receptors, GABA-A / Q000032:analysis* / Q000145:classification; D012890:Sleep / Q000187:drug effects* / Q000502:physiology; D012894:Sleep Stages / Q000187:drug effects; D005680:gamma-Aminobutyric Acid / Q000502:physiology
chemical_list: D011963:Receptors, GABA-A; D005680:gamma-Aminobutyric Acid; D005445:Flunitrazepam