Combined evoked potentials in co-occuring attention deficit hyperactivity disorder and epilepsy

Area of Science:

• Neuroscience
• Clinical Neurophysiology
• Pediatrics

Background:

• Evoked potentials are known to be disrupted in attention deficit-hyperactivity disorder (ADHD) and epilepsy.
• The impact of these conditions individually and concurrently on evoked potentials requires further investigation.

Purpose of the Study:

• To investigate how evoked potentials are characteristically affected by ADHD and epilepsy, both separately and together.
• To explore the potential diagnostic significance of combined evoked potential recordings in comorbid cases.

Main Methods:

• A study involving 40 children divided into four groups: control, ADHD, epilepsy, and comorbid ADHD-epilepsy.
• Assessment included brainstem auditory evoked potentials (BAEPs), visual evoked potentials (VEPs), and auditory P300.
• Epilepsy patients were on antiepileptic treatment; ADHD patients were untreated.

Main Results:

• Epilepsy prolonged visual evoked potential latencies (P100, N135), an effect attenuated by comorbid ADHD.
• Brainstem auditory evoked potential components were prolonged in the comorbid group.
• Auditory P300 latencies were extended in children with both ADHD and epilepsy.
• Cognitive performance was reduced in the ADHD group.

Conclusions:

• Comorbid ADHD and epilepsy present unique evoked potential disturbances, hinting at a shared physiopathological mechanism.
• Combined evoked potential recordings may hold diagnostic importance for this comorbidity.