Comparison of the delta EEG in the first and second non-REM periods in depressed adults and normal control
Psychiatry ResearchPublished 1 January 1992
Roseanne Armitage, J.Scott Calhoun, A. John Rush, Howard P. Roffwarg
Citations40
SJR quartileQ1
SJR score1.61
SNIP1.29
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
It is suggested that ratios of delta activity in the first two NREM periods may not systematically differentiate depressed adults from normal subjects.
Abstract
The distribution of period-analyzed delta activity in the first and second non-rapid eye movement (NREM) periods was compared in nine symptomatic depressed outpatients and nine normal controls. The groups did not differ in ratios of delta zero-cross or delta power in the first to the second NREM periods. Further, neither group showed a systematic change in delta count or delta power across the first two NREM periods. Our findings suggest that ratios of delta activity in the first two NREM periods may not systematically differentiate depressed adults from normal subjects.
Keywords
PsychologyNeuroscience
Journal of Neurology Neurosurgery & PsychiatryA RATING SCALE FOR DEPRESSION
32,633 Citations1960M. Hamilton
The present scale has been devised for use only on patients already diagnosed as suffering from affective disorder of depressive type, used for quantifying the results of an interview, and its value depends entirely on the skill of the interviewer in eliciting the necessary information.
Archives of General PsychiatryThe Structured Clinical Interview for DSM-III-R (SCID)
4,364 Citations1992Robert L. Spitzer
The history, rationale, and development of the Structured Clinical Interview for DSM-III-R (SCID) is described, which is a semistructured interview for making the major Axis I DSM- III-R diagnoses.
Electroencephalography and Clinical NeurophysiologySleep deprivation: Effect on sleep stages and EEG power density in man
1,016 Citations1981Alexander A. Borbély, Fritz Baumann +3 more
The present findings support the hypothesis that the EEG power density in the low frequency range is an indicator of a progressively declining process during sleep whose initial value is determined by the duration of prior waking.
Archives of General PsychiatryDelta Sleep Ratio
226 Citations1990David J. Kupfer
Analysis of data on 74 patients in a long-term maintenance treatment study for a minimum of 24 months demonstrates that the delta sleep ratio can predict survival time following discontinuation of drug treatment.
Psychiatry ResearchApplication of automated REM and slow wave sleep analysis: II. Testing the assumptions of the two-process model of sleep regulation in normal and depressed subjects
102 Citations1984David J. Kupfer, Richard F. Ulrich +6 more
The two-process model of sleep regulation as applied to depression postulates that measures of phasic REM activity are inversely related to process S, suggesting that process S can be regarded as exerting an inhibitory influence on phasIC REM activity.
Psychiatry ResearchFrequency analysis of the sleep EEG in depression
95 Citations1987Wallace B. Mendelson, David A. Sack +6 more
Eight patients with major depressive disorder and matched controls had sleep studies, on which frequency analysis of the electroencephalogram (EEG) was performed, suggesting that mean REM latencies are not always shorter in major depression.
Electroencephalography and Clinical NeurophysiologySlow wave sleep. Physiological, pathophysiological and functional aspects
91 Citations1990John R. Hughes
Biological PsychiatryComparison of automated REM and slow-wave sleep analysis in young and middle-aged depressed subjects
83 Citations1986David J. Kupfer, Charles F. Reynolds +2 more
Although the younger depressed patients showed increased numbers of delta waves, the middle-aged depressives showed greater average REM count and little statistical relationship between manual measures of slow-wave sleep and automated measures of delta sleep was found.
Biological PsychiatryDigital period analysis of sleep EEG in depression
55 Citations1992Roseanne Armitage, Howard P. Roffwarg +4 more
Preliminary data suggest that depression may be associated with some degree of ultradian rhythm disturbances though periodicity is unaffected and fast and slow frequency EEG measures differed significantly in the two groups.
PubMedConceptual and methodological considerations towards the development of computer-controlled research on the electro-physiology of sleep.
39 Citations1979Hoffmann Rf, Moffitt Ar +3 more
It is argued that the measurement potential of computers is barely tapped by using computers to score sleep stages and the advantages of collecting data which are suitable for parametric and multivariate statistical analysis are described.
PsychophysiologyVariations in Period‐Analysed EEG Asymmetry in REM and NREM Sleep
38 Citations1989Roseanne Armitage, Robert Hoffmann +2 more
The results suggest that REM sleep is associated with relative hemispheric symmetry whereas asymmetries are most prominent in slow wave sleep, and Stage 2 sleep was significantly less asymmetrical than slow wave on a number of theta and delta measures.
Electroencephalography and Clinical NeurophysiologyA multivariate comparison between two EEG analysis techniques: Period analysis and fast fourier transform
22 Citations1981Ross Pigeau, Robert Hoffmann +1 more
It is concluded that period analytic and FFT analysed EEG share similar types of information and that period analysis can be used more often in EEG research.
SLEEPDistribution of Period-Analyzed Delta Activity During Sleep
21 Citations1992Roseanne Armitage, Howard P. Roffwarg
The findings suggest that the temporal changes of delta activity may not be entirely systematic across NREMPs and are variable across subjects.