PMID- 1475571
OWN - NLM
STAT- MEDLINE
DCOM- 19930201
LR  - 20090129
IS  - 0161-8105 (Print)
IS  - 0161-8105 (Linking)
VI  - 15
IP  - 6
DP  - 1992 Dec
TI  - Distribution of period-analyzed delta activity during sleep.
PG  - 556-61
AB  - The distribution of delta EEG activity was evaluated during sleep in eight 
      healthy adults. Digital period analysis, including an amplitude measurement, was 
      used to quantify delta activity. The average percentages of delta half- and 
      full-wave zero-crosses, mean delta power, and mean total power were computed for 
      each nonrapid eye movement (NREM) period. The distribution of these delta 
      measures was examined across NREM periods (NREMPs). No significant linear trends 
      were evident in the zero-cross or power measures. Four subjects showed the 
      highest delta power and greatest incidence of delta in the second rather than 
      first NREMP. Regression analyses of individual delta incidence data revealed that 
      only 62.5% of recording nights could be described with an exponential equation. 
      Exponential regressions described 81% of delta amplitude cases. Further, delta 
      activity in some subjects could be described by either linear or exponential 
      regression. The findings suggest that the temporal changes of delta activity may 
      not be entirely systematic across NREMPs and are variable across subjects.
FAU - Armitage, R
AU  - Armitage R
AD  - University of Texas Southwestern Medical Center, Dallas Department of Psychiatry 
      75235-9070.
FAU - Roffwarg, H P
AU  - Roffwarg HP
LA  - eng
GR  - MH4115/MH/NIMH NIH HHS/United States
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - United States
TA  - Sleep
JT  - Sleep
JID - 7809084
SB  - IM
CIN - Sleep. 1993 Dec;16(8):762-3. PMID: 8165392
MH  - Adult
MH  - Cerebral Cortex/physiology
MH  - Circadian Rhythm/physiology
MH  - *Delta Rhythm
MH  - Electroencephalography/*instrumentation
MH  - Female
MH  - Fourier Analysis
MH  - Humans
MH  - Male
MH  - Polysomnography/*instrumentation
MH  - Reference Values
MH  - Signal Processing, Computer-Assisted/*instrumentation
MH  - Sleep Stages/*physiology
EDAT- 1992/12/01 00:00
MHDA- 1992/12/01 00:01
CRDT- 1992/12/01 00:00
PHST- 1992/12/01 00:00 [pubmed]
PHST- 1992/12/01 00:01 [medline]
PHST- 1992/12/01 00:00 [entrez]
PST - ppublish
SO  - Sleep. 1992 Dec;15(6):556-61.