What are endorphins commonly associated with?

Endorphins are neuropeptides produced by the central nervous system and pituitary gland, and they play a crucial role in pain management and the modulation of pleasure. Their primary function is to help relieve pain and induce feelings of pleasure or euphoria, which is often described as a "runner's high" experienced after vigorous exercise. This connection to both pain relief and the enhancement of pleasurable sensations is why they are commonly referred to as the body’s natural painkillers.

While memory retention, sleep regulation, and motor control are influenced by various neurotransmitters and hormones, they are not the key functions associated with endorphins. Memory is more closely linked to neurotransmitters like acetylcholine and glutamate, sleep is regulated by serotonin and melatonin, and motor functions are primarily controlled by dopamine and other signals. Understanding the unique role of endorphins in pain control and pleasure helps clarify their importance in the biological basis of behavior.