Poor deep sleep in infants may signal higher autism likelihood, study reveals

Infants at higher likelihood of autism face distinct challenges with deep sleep, according to recent research. While they spend the same amount of time in this crucial sleep stage as other babies, the quality is noticeably poorer. Their brains appear less able to block out sensory disturbances, even in quiet settings.

The study, led by the University of East Anglia, found that these infants experience shallower deep sleep due to incomplete sensory decoupling in the brain. Unlike their peers, their rest remains disrupted by external stimuli, particularly in moderately loud environments. This difficulty persists even when surroundings are calm, suggesting a fundamental difference in how their brains process sensory input during rest.

Researchers observed weaker slow-wave activity in these children, a sign that their brains struggle to fully disengage from the outside world. The heightened sensitivity to noise and other stimuli often appears well before any formal autism diagnosis is made. No further developments on this specific area of sleep research have been reported since the study's publication.

The findings highlight a measurable difference in sleep patterns among infants with a higher likelihood of autism. Their deep sleep, though lasting as long as other babies', remains less restorative due to ongoing sensory sensitivity. This could provide an early indicator for clinicians and parents to monitor before behavioral signs emerge.