Medical science offers us a number of different ways to dull or treat pain.

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

From remembering a friend's face to figuring out where you left your keys, the act of memory has many dimensions.

Researchers throughout the world are pursuing a variety of new ways to repair or replace neurons and other cells in the brain. For the most part, these experimental approaches are still being worked out in animals and cannot be considered therapies for humans at this time.

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.

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

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

Insulation covering wires preserves the strength of the electrical signals that travel through them. The myelin sheath covering axons serves a similar purpose.