Sleep and Circadian Regulation of Neural Repair and Plasticity after Central Nervous System Injury
Abstract
Neural repair and plasticity after central nervous system injury depend on tightly coordinated biological processes, including synaptic remodelling, adult neurogenesis, metabolic clearance, and immune regulation. Sleep and circadian rhythms have emerged as key modulators of these processes, yet they remain under integrated within prevailing models of neural recovery. This review evaluates experimental and clinical evidence linking sleep and circadian biology to neural repair following stroke, traumatic brain injury, and related conditions. We examine how sleep disruption impairs synaptic plasticity, glymphatic clearance, and functional recovery, and how circadian clocks regulate neural stem cell dynamics and neuroinflammatory responses. Methodological strengths and limitations across studies are analysed, with emphasis on inconsistencies arising from heterogeneous injury models, sleep paradigms, and outcome measures. Studies reveal convergent evidence that temporal misalignment exacerbates secondary injury, although effect sizes vary widely. We identify critical gaps, including the failure to disentangle sleep dependent from circadian dependent mechanisms and the under representation of sex and age as biological variables. Finally, we discuss emerging therapeutic strategies targeting sleep and circadian pathways and propose research directions to integrate chronobiology into neural repair paradigms.
Keywords
Ethical Statement
References
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Details
Primary Language
English
Subjects
Emergency Medicine, Psychiatry, Intensive Care
Journal Section
Review
Authors
Elizabeth Anthony
This is me
0009-0002-4376-496X
Nigeria
Publication Date
August 31, 2026
Submission Date
February 2, 2026
Acceptance Date
April 22, 2026
Published in Issue
Year 2026 Volume: 10 Number: 2
