What is the definition or description of: hemiplegic migraine?

See below: Hemiplegic migraine (hm) is a rare, neurological disease. Hm is classified as migraine with aura accompanied by motor weakness. When a hemiplegic migraine attack occurs, the person can experience a variety of symptoms ranging in severity and lasting in duration from a few minutes to months. Symptoms can include visual disturbances, sensory loss, weakness to paralysis on one-side of the body.

Wikipedia: This is a relatively rare migraine. However I am familiar, through family members, with this diagnosis. Since this is a relatively rare diagnosis, the internet will not be very helpful confirming this diagnosis. You will need a physician (neurologist) who has experience with the symptoms to provide you with a reasonable answer. Unfortunately, we're talking about the fringes of medical knowledge.