Touch is the sense by which we determine the characteristics of objects: size, shape, and texture.

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.

Neuroscientists believe that the brain can remain relatively healthy and full-functioning as it ages.

Optical imaging relies on shining weak lasers through the skull to visualize brain activity. These techniques are inexpensive and relatively portable. They are also silent and safe: Because only extremely weak lasers are used, these methods can be used to study everyone, even infants.

The brain uses a variety of chemicals called neurotransmitters to communicate between brain cells.

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.

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

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.

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