Dopamine

Dopamine is a neurotransmitter. Many kinds of animals and humans use it to transmit information. It is used when the brain sends signals to the muscles in the body to make them move. It can make a person feel good. 

Dopamine is an important chemical found in the brain. If the brain does not make enough dopamine, it causes an illness called Parkinson's disease. This can be treated by giving the Parkinson's disease patient a drug called L-Dopa, which the body converts to dopamine. 

Dopamine is a neurotransmitter that plays many important roles in the human brain and body. It is a chemical which is triggered by the feeling of being in love, or feeling affection. In most cases, it is also activated by nicotine or cocaine. It can also be activated by marijuana.

 Age-related decline in dopamine 
A number of studies have reported an age-related decline in making dopamine. There is also a drop the number of dopamine receptors in the brain.

The reduction of dopamine with aging may be responsible for neurological symptoms which increase in frequency with age, such as decreased arm swing and increased rigidity. Changes in dopamine levels may also cause age-related changes in cognitive flexibility (~ thinking).

 References 

Category:Molecular biology
Category:Neuroscience
Category:Phenethylamines
Category:Phenols
Category:Happy hormones