The interplay between sleep and cognition in adults with Epilepsy: evidence from a systematic review.

In 30 seconds

This systematic review examined associations between sleep and cognition in adults with epilepsy, including sleep architecture, self-reported sleep quality, and sleep-related memory consolidation. Thirteen studies, comprising data from 581 patients, met the review’s criteria. Nine studies reported significant correlations between at least one sleep measure and cognitive function, while four found a retained benefit of sleep for memory. Six studies reported a negative association between nocturnal interictal epileptic discharges and cognition. The authors conclude that the relationship remains complex and call for larger, more homogeneous studies.

Key findings

• Nine of 13 studies found significant correlations between at least one sleep parameter and cognitive function.
• Four studies found that sleep continued to benefit memory consolidation in adults with epilepsy.
• Six studies reported a negative effect of nocturnal interictal epileptic discharges on cognition.
• Four studies identified sleep microstructure as having an independent role in cognitive function.

Why it matters

Sleep may support memory in adults with epilepsy, but nocturnal epileptic discharges could interfere with overnight consolidation and limit that benefit. The findings highlight sleep as a potentially relevant dimension when considering cognitive difficulties in this population, while underscoring that current evidence does not establish a single, clear relationship between sleep measures and cognition.

What to keep in mind

The review included only 13 studies, and the authors note that more homogeneous studies with larger cohorts are needed to clarify the relationship between sleep macro-architecture and cognition.