To learn the effects of drugs that depress the central nervous system, the effects of drugs that stimulate the central nervous system, the tendency of these drugs to make addictions, the effects of drugs showing selective effects on the central nervous system, the use of these drugs in treatment and to learn the side effects

Transmission is provided by electrical signals in the nervous system. Neurons (nerve cells) provide the relationship between intersections called synapses. In general, a chemical mediator (neurotransmitter) is secreted from the presynaptic neuron, which affects specific receptors on the surface of the post-synaptic neuron. The neurotransmitter-receptor complex initiates a number of events (such as opening special ion channels). As a result, the electrical activity of the postsynaptic neuron is stimulated or inhibited or regulated. The main mechanism of action of many drugs affecting the central nervous system has been partially elucidated. Many are believed to alter communication between neurons and / or alter the basic cellular function of neurons. Any agent that slows down electrical conduction in the nerve cell is also expected to affect behavior. Drugs can act in the following ways: ¦ Reduce or increase the biosynthesis of the neurotransmitter. ¦ Reduce or increase the metabolic breakdown of the neurotransmitter. ¦ Modify neurotransmitter retrieval and reuse in presynaptic region