Short-Form Video Deactivates Brain Regions Governing Cognitive Control, Study Finds

A neurological study reported August 19, 2026 found that viewing preferred short-form videos significantly deactivated the dorsolateral prefrontal cortex and anterior cingulate cortex — brain regions responsible for sustained attention, inhibitory control, and self-regulation. Algorithmic personalization appeared to amplify the effect. A medRxiv preprint independently corroborated reduced activation in the same regions during personalized TikTok viewing.