[Circadian rhythm-related EEG changes in XXXX and @entity162 ].

@entity1 @entity162 @entity308
From 10 endogenous @entity308 and 10 @entity162 alert but relaxed @entity1 closed-eye-EEG's were registered at 8.00 a.m., 12.00 noon, 4.00 p.m., and 8.00 p.m., and recorded on tape for computer processing. Simultaneously each time the body temperature was measured. The findings were compared with corresponding former data of 12 healthy young @entity1 and 10 healthy aged volunteers. RESULTS: The peak-frequency of the @entity162 @entity1 proved to be significantly higher than that of the @entity308 ones, and besides slightly exceeded that of the healthy @entity1 . While in the latter temperature and occipital peak-frequency ascend step by step from the morning to the evening, the @entity308 @entity1 show a resembling increase only in outlines in the peak-frequency, whereas the temperature already decreases from 4.00 p.m. to 8.00 p.m. In the @entity162 @entity1 peak-frequency and temperature and delta-Power reach their acme at 4.00 p.m., but as well the peak-power as the power of alpha- and beta-frequency-bands show a trough just at 4.00 p.m. In the @entity308 @entity1 , on the other hand, alpha-, theta, and delta-frequency-bands mainly have their summits at 12.00 noon. Finely the @entity162 @entity1 stand out by most significant band-power-variations between the distinct daytimes, while uninterrupted gradual increasing is extreme rare. In the @entity308 @entity1 both these events scarcely are found. The healthy volunteers have intermediate positions. All in all the results show, that in @entity308 circadian variations of EEG-parameters appear disorganized, while in mania a modified organization prevails.
