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The circadian system and affective disorders: clocks or rhythms?
1Department of Psychiatry, University of Cambridge Clinical School, U.K.
Chronobiology International
|January 1, 1990
Summary
This study challenges the idea that abnormal clock functioning causes affective disorders. Instead, it suggests that disrupted circadian rhythms, not faulty clock mechanisms, may underlie these conditions.
Area of Science:
- Neuroscience
- Psychiatry
- Chronobiology
Background:
- Affective disorders are complex mental health conditions.
- The role of the circadian system in affective disorders is under investigation.
- Current hypotheses link affective disorders to pathology within the biological clock.
Purpose of the Study:
- To evaluate the evidence supporting a link between circadian clock pathology and affective disorders.
- To propose an alternative hypothesis regarding the circadian system's role in affective disorders.
Main Methods:
- Review of neurophysiological research on affective disorders.
- Analysis of clinical findings and phenomenology of affective disorders.
- Examination of evidence for circadian rhythm disturbances versus clock pathology.
Main Results:
- Current evidence does not strongly support a pathology of the circadian clock in affective disorders.
- Neurophysiological, clinical, and phenomenological data can support a disturbance of circadian rhythms.
- This disturbance may occur with normal functioning of the core biological clock.
Conclusions:
- The hypothesis of circadian clock pathology underlying affective disorders lacks sufficient support.
- A primary disturbance of circadian rhythms, independent of clock mechanism pathology, is a plausible alternative.
- This alternative has implications for future research and treatment strategies for affective disorders.