Sleep Disorders and Epilepsy Management

Sleep and epilepsy interact bidirectionally: disturbed sleep exacerbates seizure frequency and severity, while seizures and antiepileptic therapies disrupt sleep continuity and architecture. Common comorbid sleep disorders include insomnia, obstructive sleep apnoea and restless legs syndrome, each capable of lowering seizure threshold through fragmented sleep or hypoxia. Conversely, nocturnal seizures often present as arousals or parasomnias, complicating diagnosis. Effective management demands comprehensive assessment of sleep habits, objective monitoring via polysomnography or long-term electroencephalography, and tailored interventions. Pharmacological choices should balance seizure control against sedative or activating side-effects, while behavioural measures—sleep hygiene, cognitive–behavioural therapy and optimised seizure timing—can reinforce circadian stability. Addressing sleep comorbidities not only reduces seizure burden but also enhances cognition, mood and quality of life in people with epilepsy.

Research from Nature Portfolio

Recent studies have highlighted how focal epileptic networks alter sleep microstructure. One investigation using high-density electroencephalography demonstrated that patients with focal epilepsy exhibit a marked reduction in sleep spindle density during stage N2 sleep, particularly over the region of seizure onset, correlating with attentional deficits. A foundational analysis of interictal discharges revealed that spike duration and spatial spread differ markedly between non-rapid eye movement and rapid eye movement sleep: interictal discharges in REM are briefer and more spatially confined, improving the localisation of epileptogenic zones. These findings suggest that sleep-stage modulation of neural synchrony not only underpins cognitive impairment in epilepsy but may inform surgical planning and biomarker development.

Sleep Disorders and Epilepsy Management publication trend

The graph below shows the total number of articles in sleep disorders and epilepsy management across all publications each year (not limited to Nature Index journals).

Technical terms

Sleep spindle: Brief bursts of 11–16 Hz oscillations in stage N2 sleep associated with memory consolidation and cortical synchrony.

Non-rapid eye movement (NREM) sleep: Sleep stages characterised by slow-wave activity and reduced muscle tone, divided into stages N1–N3.

Rapid eye movement (REM) sleep: A sleep stage marked by desynchronised EEG, vivid dreaming and muscle atonia, important for memory and emotional regulation.

Interictal epileptiform discharge: Paroxysmal EEG waveform occurring between seizures, indicative of epileptogenic brain regions.

Polysomnography: Multimodal recording of sleep patterns including EEG, electrooculography, electromyography and respiratory parameters.

References

1. Expert Opinion: Managing sleep disturbances in people with epilepsy. Epilepsy & Behavior (2021).
2. Focal epilepsy disrupts spindle structure and function. Scientific Reports (2022).
3. Quantitative spatio-temporal characterization of epileptic spikes using high density EEG: Differences between NREM sleep and REM sleep. Scientific Reports (2020).
4. Sleep and epilepsy: A snapshot of knowledge and future research lines. Journal of Sleep Research (2022).
5. Seizure likelihood varies with day-to-day variations in sleep duration in patients with refractory focal epilepsy: A longitudinal electroencephalography investigation. EClinicalMedicine (2021).
6. Sleep quality and architecture in Idiopathic generalized epilepsy: A systematic review and meta-analysis. Sleep Medicine Reviews (2022).