Many scientific studies conducted over decades have established that drug dependence and addiction are features of an organic brain disorder caused by ... read more
Endorphins, enkephalins. Serotonin is also an important neurotransmitter that is not a natural occurring opioid, as the previous two, but has many beneficial effects, such as regulating sleep, body temperature, etc., and also inhibits aggressiveness. It also prevents depression. read more
chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse. read more