Pupil size changes with different stages of sleep, getting smaller as sleep gets deeper, in mice

When people are awake, their pupils regularly change in size. Those changes are meaningful, reflecting shifting attention or vigilance, for example. Now, researchers reporting in Current Biology on January 18 have found in studies of mice that pupil size also fluctuates during sleep. They also show that pupil size is a reliable indicator of sleepContinue reading “Pupil size changes with different stages of sleep, getting smaller as sleep gets deeper, in mice”

Pupil response to negative facial expressions predicts risk for depression relapse

Pupil dilation in reaction to negative emotional faces predicts risk for depression relapse, according to new research from Binghamton University, State University of New York. Researchers at Binghamton University, led by PhD student Anastacia Kudinova, aimed to examine whether physiological reactivity to emotional stimuli, assessed via pupil dilation, served as a biological marker of riskContinue reading “Pupil response to negative facial expressions predicts risk for depression relapse”

Pupil Response Predicts Depression Risk in Kids

Emerging research suggests pupil dilation in children of depressed mothers when seeing an emotional image can help predict his or her risk of depression over the next two years. Dr. Brandon Gibb, a professor of psychology at Binghamton University in New York, said the new findings suggest physiological reactivity to sad stimuli can be aContinue reading “Pupil Response Predicts Depression Risk in Kids”