Reward noradrenaline

REWARDS Positive reinforcement pleasure, joy, ecstasy dopamine noradrenaline serotonin corticosteroids... 

Not really. Epinephrine itself is not psychoactive and there s no evidence that it s chemically addictive. However, there are people who seem to thrive on dangerous activities, but this may be less to do with the so-called adrenaline rush , and more to do with the release of endorphins (natural painkillers that act in similar way to morphine (see p347) and may also be addictive), and of other neurotransmitters (noradrenaline, serotonin and dopamine) which are linked to learning. The idea is that if the activity doesn t hurt or kill the creature, the levels of these molecules in the brain increase and the creature is rewarded with feelings of pleasure or satisfaction, and this positive feedback makes the creature... 

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