The role of stimulant washout status in functional connectivity of default mode and fronto-parietal networks in children with neurodevelopmental conditions.

Kelsey et al. (2024) scanned the kids with autism or ADHD. Half had taken their stimulant that morning. The other half had skipped it for 24–48 hours.

The team compared resting-state fMRI pictures of two brain networks: the default mode (day-dream net) and the fronto-parietal (focus net). They asked: does missing a pill change how these nets talk to each other?

No difference. Connectivity numbers were almost identical between the on-med and off-med groups.

In plain words: skipping stimulants for two days does not re-wire the brain pictures you get in the scanner.

Nair et al. (2026) also mapped these same networks in autistic teens and saw real connectivity gaps compared with typical peers. Kelsey’s work now says those gaps are not due to whether the child took today’s pill—so the signal is about autism, not medication timing.

Fitzgerald et al. (2015) found weaker focus-net links in autistic teens during an attention task. Kelsey shows the resting picture is stable with or without stimulants, backing the idea that the weakness is trait-like, not a short-term drug effect.

McQuaid et al. (2024) saw odd frontal activity during speech tasks and blamed poor default-mode disengagement. Kelsey’s null result hints that altered frontal numbers are unlikely to be a 48-hour withdrawal artifact; the difference is probably autism-related.

If you refer a client for fMRI research or a neurofeedback baseline, you can skip the stressful washout. The scan will look the same, the child stays medicated, and you keep behavior steady. Just note current dose in your file so future studies can replicate.