Childhood psychosis and computed tomographic brain scan findings.
One in four autistic kids show large CT brain changes, but newer MRI studies show subtler, life-long brain growth patterns.
01Research in Context
What this study did
Doctors took CT brain scans of children with autism and other psychoses. They looked for big, visible brain changes like enlarged ventricles. They compared these kids to healthy controls.
What they found
About one in four autistic kids showed large CT abnormalities. Enlarged frontal ventricles were common in all psychosis groups. The Evans ratio, a measure of ventricle size, was higher in every clinical group than in typical kids.
How this fits with other research
Pan et al. (2021) pooled decades of data and confirmed that neurological issues like epilepsy and macrocephaly are more common in autism. Their 2021 review includes the 1983 CT findings, showing the pattern holds across time.
Lange et al. (2015) used modern MRI to track the same kids over years. They found early brain over-growth, then loss of white matter and bigger ventricles. This updates the 1983 snapshot with a life-span picture.
Hardan et al. (2006) zoomed in on subtle orbital changes with MRI. They saw that only autistic kids with lower IQ had closer-set eyes. This refines the 1983 view that gross changes matter most.
Why it matters
If you see an autistic client with motor or language delays, remember that brain structure can differ. The 1983 CT study and later MRI work both flag ventricle size and head-size extremes. Use head-circumference checks and watch for seizures or low tone. These quick screens can guide referrals and explain uneven skill profiles.
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02At a glance
03Original abstract
Twenty-seven infantile autistic children, nine children with other kinds of childhood psychoses, 23 children with mental retardation, and 16 normal children were examined with computerized tomography of the brain. Gross abnormalities were seen in 26% of the autism cases. It was also estimated that about the same proportion of a total population of infantile autistic children show gross changes of CT brain scan. Abnormalities in the region of the frontal horns of the ventricular system tended to be more common in the psychosis groups than in the normal group. Clear-cut right occipital protuberation was rather common in the small group of other psychoses cases but was only marginally more common in the autism than in the normal group. Evans' ratio was significantly higher in all three abnormal groups than in the normal group.
Journal of autism and developmental disorders, 1983 · doi:10.1007/BF01531356