What Caffeine Really Does to Your Brain - Forbes | Learning, Brain & Cognitive Fitness | Scoop.it

"What caffeine does do is one heck of an impersonation. In your brain, caffeine is the quintessential mimic of a neurochemical called adenosine. Adenosine is produced by neurons throughout the day as they fire, and as more of it is produced, the more your nervous system ratchets down."