So, sometimes if I sleep in late, I risk overheating and getting a migraine. I long ago stumbled upon caffeine as a preventative and cure for my migraines. I always thought it was a vasodilator, until I mentioned htis to a nurse friend, and she's like "Noooo, it's a vasoconstrictor." Which, of course, make no sense to me, so I finally went and looked it up.
Well, turns out that migraines are complicated. I suppose anyone who gets the damn things frequently already knew that. Show how lucky I am to get them so infrequently.
I've also noticed that when I feel one coming on, I can pop a caffeine tablet (200 mg), and go to sleep, and wake up and never actually suffer the migraine. Go figure. Maybe my pre-migraine condition is caused because when I overheat, the blood vessels in my brain dilate, and thus the caffeine helps me avoid that particular migraine.
So, there you go. Coffee (and caffeine) can be good for your brain. (It's also effective if you have ADD, but most prescription drugs have a smaller side-effect profile, so if you're self-medicating your ADD with caffeine [or worse - sugar], talk to your doctor about it.)
The images were poached off the web, and my apologies for not having properly tracked where I found them, so I cannot give credit where credit is due.