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H Pohl

Publications and source records attributed to H Pohl.

52 records · Page 3Linked to original sources
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Re-entrainment of circadian rhythms after phase-shifts of the Zeitgeber.

To describe anabrupt shift of the Zeitgeber sufficiently, it is necessary to indicate whether the phase has been advanced or delayed, for how many hours it has been shifted, and what part of the Zeitgeber has been lengthened or shortened respectively. The entrained circadian system usually follows a shift of the Zeitgeber in the same direction and by an equal amount. However, there can be exceptions to both of these rules: a) an instantaneous 12-h shift of a (symmertric) Zeitgeber always represents a delya (= doubling of one-half of its period). In contrast to this, the gradual re-entrainment of the circadian system can be accompalished by either advances or by delays (Fig. 2), it can occur in both dirctions simultaneously by splitting the rhythmic variable (Fig. 1),or it can represent an apparent advance not distinghushable from a delay ( Fig. 6); b) after complietion of re-entraiment, the phase-angle difference psi between organism and Zeitgeber an differ systematically from the pre-shift psi-value...

Activity Cycles↗
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[Spontaneous awakening and dreams of patients with psychophysiologic sleep disorders].

The effect of dreaming on the formation of psycho-physiological sleep disorders is studied by an investigation of 26 patients and 15 control persons who were interviewed as to the occurrence of dream memory after spontaneous awaking and after being awaken systematically in the sleep laboratory. It turned out that the patients had less dream memory than the control persons after spontaneous awaking from REM sleep, but they did not differ after being awaken. In addition, dream reports after spontaneous awaking from REM sleep contained more abstract dream thoughts and less visible dream action. These findings are interpreted as a manifestation of disturbed "dream work" in patients with psychophysiological sleep disorders, i.e. disturbance of connecting thoughts and scenes from the unconscious. Thus, awaking in sleep disorder is interpreted to be a progression into awakeness as a matter of defense.

Adult↗