Catecholamines are a class of neurotransmitters and hormones that play a key role in the body's response to stress, as well as regulating various physiological processes such as heart rate, blood pressure, and metabolism. The main catecholamines include dopamine, norepinephrine, and epinephrine (also known as adrenaline). Research in this area focuses on understanding the role of catecholamines in various physiological and psychological functions, as well as their involvement in conditions such as depression, anxiety, and cardiovascular disorders. Studies may also explore the mechanisms of catecholamine synthesis, release, and reuptake, as well as potential therapeutic interventions targeting the catecholaminergic system.