In response to signals from a brain region called the hypothalamus, the adrenal glands secrete glucocorticoids, hormones that produce an array of effects in response to stress.

Much faster than a traditional MRI, MEG can be used to provide even more information about brain activity.

Scientist targeted by animal rights activists asks about the ethics of inaction.

Hormones are important messages both within the brain and between the brain and the body.

A stressful situation activates three major communication systems in the brain, all of which regulate bodily functions.

Our best insights into how the normal brain ages come from long-term studies of the nervous system that began decades ago.

The messages sent from one brain cell to another are the basis of brain function. Brain cells communicate through both electrical and chemical means.

One of the most common and least understood neurobiological disorders, Tourette syndrome is an inherited disorder that affects about 200,000 Americans. Males are affected three to four times as often as females.

PET is one of the most important techniques for measuring blood flow or energy consumption in the brain. This method of measuring brain function is based on the detection of radioactivity emitted when positrons, positively charged particles, undergo radioactive decay in the brain.

Although most of us don’t think of it in this way, the related senses of taste and smell help us interpret the chemical world.