Stress hormone kicks brain cells into gear | Science News

Love Science? Welcome Home.

Support Amazing Science Journalism.

Create the New Science Generation.


News in Brief

Stress hormone kicks brain cells into gear

Norepinephrine wakes up cells called astroglia

By
12:00pm, June 18, 2014

MOTION MAKER  Cells called astroglia (green) in the cerebellum, a part of the brain that controls movements, show bursts of activity in response to the stress hormone norepinephrine. Astroglial behavior may influence nearby neurons (red). 

Some brain cells need a jolt of stress to snap to attention. Cells called astroglia help regulate blood flow, provide energy to nearby cells and even influence messages’ movement between nerve cells. Now, scientists report June 18 in Neuron that astroglia can be roused by the stress molecule norepinephrine, an awakening that may help the entire brain jump into action.

As mice were forced to walk on a treadmill, an activity that makes them alert, astroglia in several parts of their brains underwent changes in calcium levels, a sign of activity, neuroscientist Dwight Bergles of Johns Hopkins University School of Medicine and colleagues found. Norepinephrine, which acts as a fight-or-flight hormone in the body and a neural messenger in the brain, seemed to cause the cell activity boost. When researchers depleted norepinephrine, treadmill walking no longer activated astroglia.

This article is available only to subscribing members. Join the Society today or Log in.

Get Science News headlines by e-mail.

More on Consciousness

[title_1]