Assignment task: Bob, a 38 year old male, has intermittent headaches for about 10 years. When they occur, he experiences flashes of light in his right eye, followed by throbbing on the right side of his head. They frequently last 2-4 hours and is accompanied by nausea, occasional vomiting and photophobia.
1. Based on the case scenario, provide a diagnosis for Bob. Provide the pathophysiology for this type of headache.