Trait impulsivity in Juvenile Myoclonic Epilepsy

Area of Science:

• Neuroscience
• Clinical Neurology
• Psychiatry

Background:

• Impulsivity is a complex trait linked to psychopathology.
• Juvenile Myoclonic Epilepsy (JME) is a common genetic epilepsy.
• Previous meta-analyses suggest a link between response impulsivity and JME.

Purpose of the Study:

• To determine if trait impulsivity is elevated in JME patients compared to controls.
• To investigate if seizure characteristics moderate impulsivity levels in JME.
• To assess the association between impulsivity and psychiatric adverse effects of antiepileptic drugs (AEDs).

Main Methods:

• 322 JME patients and 126 controls completed the Barratt's Impulsiveness Scale (BIS-brief).
• Seizure history and AED use data were collected.
• BIS-brief scores were compared between groups and correlated with clinical variables.

Main Results:

• JME patients exhibited significantly higher BIS-brief scores than controls (18.1 vs. 16.2, P=0.0007).
• Elevated impulsivity correlated with male gender, frequent absence seizures, and lack of morning myoclonus predominance.
• High impulsivity increased the likelihood of psychiatric adverse events with levetiracetam (P=0.036).

Conclusions:

• Trait impulsivity is elevated in JME, comparable to personality and neurotic disorders.
• Seizure frequency and circadian patterns may influence impulsivity, suggesting shared neural network disruptions.
• Impulsivity may serve as a target for intervention and a factor in stratifying AED treatment in JME and other epilepsies.