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

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

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.

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.

Molecules that are important in brain development may help treat or prevent brain injuries and disorders.

From the first large studies monitoring the mental functioning of the same group of healthy humans over many years, scientists have uncovered unexpected results.

Considered the most common mental illnesses, anxiety disorders affect an estimated 18 percent of the adult population in a given year, or 40 million Americans.

To be able to see anything, eyes first need to process light. Vision begins with light passing through the cornea.

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