The role of the circadian clock in animal models of mood disorders.

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Summary

This review examines animal models using clock gene mutants, light-dark cycle manipulations, and brain lesions to investigate whether circadian disruption causally contributes to mood disorders. The findings have implications for lighting design aimed at maintaining robust circadian rhythms as a potential protective factor against depression and mania.

Key Findings

Environmentally disrupted circadian rhythms are associated with increased risk of mood disorders in the general population.
Animal models using clock gene mutants and light-dark cycle manipulations demonstrate altered affective behavior, supporting a causal role of circadian disruption in mood pathology.
Proof of direct causality between circadian rhythm disturbance and psychiatric disorders remains elusive despite substantial correlational evidence from both human and animal studies.

Categories

Mood & Mental Wellness: Reviews animal model evidence for causal links between circadian disruption and mood disorders including depression and mania.

Sleep & Circadian Health: Examines how disrupted sleep-wake and light-dark cycles relate to circadian clock dysfunction and psychiatric risk.