Vestibular Functioning in Children with Neurodevelopmental Disorders Using the Functional Head Impulse Test

Area of Science:

• Neuroscience
• Pediatrics
• Ophthalmology

Background:

• Neurodevelopmental disorders (NDDs) like autism spectrum disorder (ASD), attention deficit/hyperactivity disorder (ADHD), and reading impairment are increasingly linked to vestibular system dysfunction.
• The cerebellum's complex relationship with the vestibular system is a key area of investigation in NDDs.

Purpose of the Study:

• To evaluate the functional vestibulo-ocular reflex (VOR) in children diagnosed with NDDs.
• To assess the performance of the vestibular system in children with ASD, ADHD, and reading impairment compared to neurotypical children.

Main Methods:

• The study enrolled 80 children across four groups: ASD, ADHD, reading impairment, and typically developing (TD).
• The functional head impulse test (fHIT) was employed to measure VOR responses by assessing correct optotype identification during passive head impulses.

Main Results:

• Children with NDDs exhibited significantly lower correct response rates on the fHIT compared to TD children (p < 0.0001).
• No significant differences in VOR performance were found among the three NDD groups (ASD, ADHD, reading impairment).

Conclusions:

• Preliminary evidence suggests altered vestibular system efficiency in children with NDDs.
• VOR abnormalities detected by fHIT may serve as a potential biomarker for NDDs in pediatric populations.