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One way that scientists measure sleep is through brain waves, which change in specific ways as you move through the sleep process. Your brain waves change during four basic stages of sleep.

Medulloblastoma is a type of brain cancer. It most often affects children, but it can also happen in adults. These tumors often grow in the cerebellum, the part of the brain that controls balance and coordination.

Magnetic resonance imaging (MRI) is a test that uses a large magnet, radio signals, and a computer to make images of organs and tissue in the body. In this case, the heart is imaged. MRI may be used instead of a CT scan when organs or soft tissues are being studied.

A French-inspired creation that's both easy and elegant.

If you stay in a bed or wheelchair, or can't change positions on your own, you're at risk for pressure injuries. Learn more about them, and know when to call your doctor.

Immunotherapy is a way of treating disease or infection using the body’s immune system. It can be used in some cases to help treat cancer. One form of immunotherapy treatment for cancer is called nonspecific immunotherapy (NSI). Learn more about NSI treatments and how they're used.

Dengue (pronounced DEN-gee) fever is a viral disease. It is transmitted by mosquitoes mainly in tropical and subtropical areas of the world.

A mediastinoscopy is a procedure used to examine the mediastinum. This is the space behind the breastbone (sternum). Read on to learn more about the procedure, and what to expect.

When you're faced with a highly stressful event in your life, the strategies outlined here will help you cope.