De ce ni se dilată pupilele când suntem surprinși. Cercetătorii au descoperit ce se întâmplă în creier

A recent study reveals that pupil dilation in response to unexpected stimuli signals significant brain activity changes, aiding in learning and adaptation. Researchers observed 63 adults reacting to colored images, noting that unexpected colors caused pupil dilation and increased brain excitation. This response, linked to the locus coeruleus, helps the brain adjust when new information contradicts prior expectations. Stronger reactions to surprises led to better learning adjustments, indicating that pupil size may reflect mental context updates. The findings suggest pupils serve as visible indicators of brain responses to unexpected information, beyond light adaptation.