The limbic system helps regulate emotional and social processing, as well as learning, motivation, and memory. It consists of structures that lie beneath the outer, wrinkly part of the brain and above ...

During sleep, the body completes a number of essential actions necessary to maintain optimal health and function. However, ...

Science writer Mary Roach chronicles both the history and the latest science of body part replacement in her new book. She ...

Cortisol is a steroid hormone that regulates a wide range of body functions, including immunity, inflammation, and metabolism. Because of its role in regulating the stress response, people also call ...

Mind-body coach and CNN contributor Dana Santas tackles the first in a five-part series on the power of strength training to ...

In the second of a five-part series, Dana Santas shows how building strength in the side abdominal muscles can improve ...

When headaches or sore muscles strike us at home, we reach for everyday painkillers. Usually it’s something like ibuprofen, ...

Opioids slot into opioid receptors and activate them. This sends signals to your brain to relieve pain and promote pleasure. Both endogenous opioids, which your body naturally produces, and exogenous ...

The human hand is an intricate system comprised of bones, muscles, tendons, ligaments, nerves, and blood vessels. When injury occurs—or congenital deformities, tumors, infections, or other medical ...