Some ages of license are actually higher than the age of majority. For example, the age of license to purchase alcoholic beverages is 21 in all U.S. states. Another example is the voting age, which prior to the 1970s was 21, while the age of majority was 18 in most states.
The nervous system is composed of the brain and spinal cord, together known as the central nervous system, and a vast array of peripheral nerves that transmit information to and from these central structures. The nervous system may be damaged by infection, injury, vascular problems, inflammation, and degeneration.
First, it helps to understand what pain is. On a basic level, pain is the result of an electrical signal being sent from your nerves to your brain. But the process is not only electrical. When you get injured -- say with a sprain -- the damaged tissue releases chemicals called prostaglandins, which are like hormones.SAIDs -- or nonsteroidal anti-inflammatory drugs -- are among the most common pain relief medicines in the world.