Premium
Distinct features of fast oscillations in phasic and tonic rapid eye movement sleep
Author(s) -
BRANKAČK JURIJ,
SCHEFFZÜK CLAUDIA,
KUKUSHKA VALERIY I.,
VYSSOTSKI ALEXEI L.,
TORT ADRIANO B. L.,
DRAGUHN ANDREAS
Publication year - 2012
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/j.1365-2869.2012.01037.x
Subject(s) - tonic (physiology) , wakefulness , neuroscience , rapid eye movement sleep , eye movement , psychology , oscillation (cell signaling) , rhythm , slow wave sleep , non rapid eye movement sleep , electroencephalography , physics , chemistry , acoustics , biochemistry
Summary Spatiotemporal activity patterns of neurones are organized by different types of coherent network oscillations. Frequency content and cross‐frequency coupling of cortical oscillations are strongly state‐dependent, indicating that different patterns of wakefulness or sleep, respectively, support different cognitive or mnestic processes. It is therefore crucial to analyse specific sleep patterns with respect to their oscillations, including interaction between fast and slow rhythms. Here we report the oscillation profile of phasic rapid eye movement (REM), a form of REM sleep which has been implicated in hippocampus‐dependent memory processing. In all analysed frequency bands (theta, gamma and fast gamma, respectively) we find higher frequencies and higher power in phasic REM compared to tonic REM or wakefulness. Theta‐phase coupling of fast oscillations, however, was highest in tonic REM, followed by phasic REM and wakefulness. Our data suggest different roles of phasic and tonic REM for information processing or memory formation during sleep.