A head MRI can help your doctors to determine whether you sustained any damage from a stroke or head injury. Your doctor may also order a brain or head MRI to investigate worrying symptoms like seizures
, blurriness in vision, chronic headaches, dizziness, fatigue, and changes in behavior. An MRI can help detect the cause of these issues, which may be a brain issue since MRIs allow doctors to see bony structures and soft tissue. If you have to undergo brain surgery, your doctor may order a functional MRI ( fMRI) of the brain. A functional MRI can help doctors pinpoint the brain sections used for functions like speech and language and limb mobility. The MRI does this by measuring metabolic changes in your brain when you perform specific tasks. A medical professional will ask you to perform simple tasks during this test, like answering basic questions or performing simple mobility acts like touching your thumb to your fingers. There is another type of MRI called magnetic resonance angiography (MRA), which closely examines the blood vessels in the brain.