Image of the Day: Mouse Pupil

Pupil constriction during sleep may protect the murine brain from being awakened by sudden flashes of light.

By The Scientist Staff | January 19, 2018

Brain activity (above) corresponds to pupil dilation in a sleeping mouse's eye (below).ÖZGE YÜZGEÇ, MARIO PRSA, ROBERT ZIMMERMANN, DANIEL HUBER

Swiss scientists developed a novel method of studying pupil dilation when they noticed their laboratory mice slept with their eyes open. It uses an infrared light to image the back of the eye. They discovered that pupil size changes rhythmically during sleep, and the dilation correlates with changes in sleep states.

Ö Yüzgeç, et al. “Pupil size coupling to cortical states protects the stability of deep sleep via parasympathetic modulation,” Curr Biol, doi:10.1016/j.cub.2017.12.049, 2018.

Add a Comment

Avatar of: You



Sign In with your LabX Media Group Passport to leave a comment

Not a member? Register Now!

LabX Media Group Passport Logo

Popular Now

  1. Stem Cell Vaccine Protects Mice From Cancer
  2. Love in the Scientific Literature
    News Analysis Love in the Scientific Literature

    There are countless ways for scientists to say, “I love you.” Naming a slime-mold beetle after your wife (and another after your ex-wife) is, apparently, one of them.  

  3. Nobel Prize–Winning Biologist Dies
  4. CDC: Flu Vaccine 36 Percent Effective So Far