What is the action of drugs on the brain?

Drugs lead to a certain physical and psychological dependence, particularly the so-called hard drugs. Moreover, many adults but also teens are tempted by these experiences "extreme", which not without consequences on the brain. Explanations ...

Neurotransmitters in the brain

Communication between nerve cells, neurons, is performed using chemicals, neurotransmitters or neurotransmitter.

Thus, nerve impulses arriving to a neuron is propagated in the axon (an extension of the neuron), and causes the release of a neurotransmitter that is released in what is called the synapse, which is the area junction between two neurons.

The neurotransmitter and will bind to specific receptors on the cell membrane of the receiving neuron, which in turn will by the same mechanisms, the propagation of nerve impulses.

Neurotransmitters may be of different natures: the main consist of serotonin, dopamine and acetylcholine. Different regions of the brain, the proportion and number of receptors vary.