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The Dopeness! In the brain, dopamine functions as a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells. It plays a major role in the brain system that is responsible for reward-motivated behavior. Every type of reward that has been studied increases the level of dopamine in the brain, and a variety of addictive drugs, including stimulants such as cocaine, amphetamine, and methamphetamine, act by amplifying the effects of dopamine. (pinned from The…

nightmare before christmas tattoos | My Tim Burton inspired, Nightmare Before Christmas tattoo | Flickr ...

23 Stunningly Subtle Disney Tattoos