Hello. I had woken up with another severe migraine attack. I was vomiting over 24 hours straight, which has happened in the past, but never that bad. When i was able to get to my telephone to dial 911 i then realized i could not move my left hand and my left arm was numb. I was i the hospital for one week. The mri shows white matter changes and they said that these changes are most typically seen as the residual of a migraine or as an acute hypertensive event. Can a migraine cause radial nerve palsy? PT has not helped.