Motion Perception and Form Discrimination in Extremely Preterm School-Aged Children

Area of Science:

• Neuroscience
• Developmental Psychology
• Pediatrics

Background:

• Extremely premature (EPT) birth (< 27 weeks gestational age) poses risks for neurodevelopmental outcomes.
• Visual processing, including motion and form perception, can be affected by premature birth.
• Long-term cognitive and perceptual follow-up is crucial for EPT populations.

Purpose of the Study:

• To compare motion and form perception abilities in children born EPT versus term-born controls.
• To investigate the impact of IQ and visual acuity on these perceptual differences.
• To explore associations between perceptual deficits and factors like gestational age or neonatal complications.

Main Methods:

• Population-based study comparing 71 EPT children (aged 6.5 years) with 79 matched term-born controls.
• Utilized motion coherence and form coherence tests to assess perceptual abilities.
• Statistical analyses controlled for intelligence quotient (IQ) and visual acuity.

Main Results:

• EPT children performed significantly worse than controls on both motion and form perception tasks.
• After controlling for IQ and visual acuity, only motion perception deficits remained significant in the EPT group.
• No significant correlations were found between motion perception accuracy and gestational age, retinopathy of prematurity, or intraventricular hemorrhage.

Conclusions:

• Children born extremely premature exhibit persistent deficits in motion perception.
• These motion perception deficits are independent of general cognitive ability (IQ) and visual acuity.
• Early visual processing, particularly motion perception, warrants attention in the long-term care of EPT survivors.