Circadian disruption and its clinical implications in Parkinson's disease: A Narrative review

Mar 29, 2026Sleep medicine

Disrupted Body Clock and Its Health Effects in Parkinson's Disease

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Abstract

Circadian dysfunction in Parkinson's disease is associated with alterations in clock gene expression and melatonin secretion.

  • Pathological lesions affecting circadian regulation may lead to circadian disruption in patients with Parkinson's disease.
  • Reduced neuronal firing in the central pacemaker could influence clock gene expression and melatonin rhythms.
  • Motor and non-motor symptoms in Parkinson's disease may include sleep disorders, autonomic dysfunction, and depression.
  • Therapeutic options such as light therapy, melatonin, and behavioral strategies may address circadian rhythm disorders.
  • The genetic basis for circadian disruption in Parkinson's disease is not fully understood, and overlapping symptoms may complicate the underlying neuropathophysiology.

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