Meningitis is an infection of the membranes covering the brain and spinal cord. This covering is called the meninges.| medlineplus.gov
Magnetic resonance angiography (MRA) is an MRI exam of the blood vessels. Unlike traditional angiography that involves placing a tube (catheter) into the body, MRA is noninvasive.| medlineplus.gov
A head MRI (magnetic resonance imaging) is an imaging test that uses powerful magnets and radio waves to create pictures of the brain and surrounding tissues.| medlineplus.gov
X-rays are a type of electromagnetic radiation, just like visible light.| medlineplus.gov
Nearly everyone has had a headache, the most common form of pain. Learn the different types, the different symptoms of, and when to see a doctor.| medlineplus.gov