compounds which include adrenaline, noradrenaline and some of their metabolites. caudal: relating to the posterior part of the body.
Compounds secreted by the adrenal medulla, the most notable of which is epinephrine (adrenaline).
Monoamine compounds, each having a catechol portion. Catecholamines known to be neurotransmitters of the central nervous system are norepinephrine and dopamine; another, epinephrine, is principally a hormone.