01/07/2026
Some children develop typically for two or more years — talking, learning, connecting — and then lose almost all of it. This late-onset regression was historically called Childhood Disintegrative Disorder.
One Yale study examined these children at every level: genetics, brain gene expression, brain activity, and eye gaze. At every level, it looked different from other forms of autism — including two findings that overturn common assumptions: their brains were hyperactive to faces, and they looked at the eyes more than any other autism group.
This isn't "severe autism." It's something distinct — and it deserves to be studied as such.
Source: Gupta et al. (2017), "Neurogenetic analysis of childhood disintegrative disorder," Molecular Autism, 8:19 (Yale Child Study Center). 🔗 Read it: https://molecularautism.biomedcentral.com/articles/10.1186/s13229-017-0133-0