<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, lately Ive been having some weakness in my elbow and wrist, do you know what could be causing this?  <response>: Based on your symptoms, its possible that you may have Moyamoya disease. This is a rare disorder that affects the blood vessels in the brain, which can lead to a range of symptoms including weakness in the limbs. Id like to run some tests and scans to confirm the diagnosis and develop a treatment plan. 