The 5-Hydroxytryptamine Receptor 1B (5-HT1B) is involved in several physiological behaviors and psychiatric disease, including locomotor activity, drug abuse reinforcement, migraine, anxiety states and aggressive behaviors.nPharmacological studies suggest that 5-HT1B is expressed by both serotonergic and non-serotonergic neurons. In the nervous system, this receptor is located in the axon terminal of the plasma membrane of unmyelinated axons. It is predominantly localized on pre-synaptic membranes. Signal transduction studies of the receptor indicate that this receptor is coupled negatively to adenylyl cyclase as its activation induces a decrease in adenylyl cyclase activity
