Rest-Activity Rhythm Phenotypes in Adults with Epilepsy and Intellectual Disability

Area of Science:

• Neuroscience
• Chronobiology
• Epilepsy Research

Background:

• Sleep and rest-activity rhythms (RARs) are often disrupted in neuropsychiatric conditions.
• Understanding these disruptions is crucial for individuals with complex health needs.

Purpose of the Study:

• To characterize RAR patterns in adults with epilepsy and intellectual disability (E+ID).
• To investigate correlations between RAR phenotypes and epilepsy severity, adaptive function, and psychopathology.

Main Methods:

• Wrist actigraphy was used to collect data on RARs from 46 E+ID adults over at least ten days.
• Standardized surveys assessed epilepsy severity, adaptive function (ABAS-3), and psychopathology (ABCL).
• RAR metrics were compared to cohorts of adults with epilepsy without ID (E-ID) and intellectually able individuals (SOL).

Main Results:

• E+ID subjects showed significantly lower RAR amplitude, robustness, and interdaily stability (IS), with higher intradaily variability (IV) and total sleep time compared to control groups.
• K-means clustering identified three distinct RAR phenotypes within the E+ID group.
• These distinct RAR phenotypes did not correlate with adaptive function or epilepsy severity measures.

Conclusions:

• Adults with E+ID display a broad spectrum of RAR phenotypes.
• RAR patterns in this population are not directly linked to epilepsy severity or adaptive function deficits.
• Further research is needed to explore the clinical implications of these diverse RAR phenotypes and potential interventions.