Auditory Reaction Time in People With Epilepsy and Healthy Controls.

Area of Science:

• Neuroscience
• Clinical Neurology
• Driving Safety Research

Background:

• Simple reaction time (SRT) to acoustic stimuli is crucial for assessing driving ability in people with epilepsy (PWE).
• Current clinical practice often compares SRT during and outside of epileptiform discharges (ED), but lacks control data for PWE with slowed SRT outside ED due to antiseizure medication or network alterations.
• Establishing reference ranges for SRT in healthy controls is essential for accurate comparison with PWE.

Purpose of the Study:

• To establish a reference range for auditory simple reaction time (SRT) in healthy controls using the same paradigm applied to patients with epilepsy (PWE).
• To provide a benchmark for comparing SRT in PWE, accounting for potential disease- and medication-related effects.
• To validate the use of SRT as a parameter in driving ability assessments for PWE.

Main Methods:

• Auditory SRT was measured in a cohort of healthy control subjects.
• A control cohort was matched by age and sex to a previously recorded cohort of PWE.
• The same SRT measurement paradigm was used for both control and PWE cohorts to enable direct comparison.

Main Results:

• Healthy controls demonstrated significantly lower mean SRT latency and reduced SRT variability compared to PWE.
• SRT was significantly prolonged in PWE during periods of epileptiform discharges (ED).
• Age was not found to be a significant confounding factor influencing auditory SRT.

Conclusions:

• The control group exhibited minimal intrapersonal variance in SRT, establishing a reliable reference range.
• Outlier SRT values observed in PWE during ED are likely indicative of impaired cognitive function relevant to driving.
• The findings support the use of SRT, particularly during ED, as a valuable parameter for evaluating driving ability in PWE.