[Eye movement recordings in children with attention deficit hyperactivity disorder]

Area of Science:

• Neuroscience
• Pediatric Medicine
• Ophthalmology

Background:

• Attention-Deficit and Hyperactivity Disorder (ADHD) impacts 3-5% of school-aged children, with diagnosis relying on DSM-IV criteria and lacking specific biomarkers.
• Oculomotor abnormalities have been observed in individuals with ADHD, indicating potential links between eye movement control and the disorder.

Purpose of the Study:

• To investigate and identify specific oculomotor task difficulties in children diagnosed with ADHD.
• To explore the potential of eye movement analysis as a diagnostic tool for ADHD.

Main Methods:

• The study involved two groups: 7 children with untreated ADHD and 7 age- and gender-matched healthy controls.
• Participants completed two oculomotor tasks: prosaccades and pursuit, to assess eye movement planning and execution.
• Statistical analysis was performed using the Student's t-test to compare performance between groups.

Main Results:

• Prosaccade tasks were successfully recorded in 5 ADHD children and all controls; 2 ADHD children could not complete due to hyperactivity.
• Children with ADHD demonstrated significantly longer prosaccade latency (299±91 ms) compared to controls (197±14 ms) (P<0.01).
• Pursuit performance showed a saccadic gain of 0.4 in ADHD children versus 0.6 in controls, but this difference was not statistically significant.

Conclusions:

• Oculomotor measurements offer a straightforward, non-invasive method for assessing children with ADHD.
• The observed prolonged prosaccade latency in children with ADHD highlights a specific oculomotor deficit associated with the disorder.