"In the central nervous system, 5-hydroxytryptamine (5-HT, or serotonin) acts as a neuromodulator and is synthetized by a specific population of neurons. 5-HT is released in nearly all subdivisions of the CNS and is involved in a wide array of brain functions as well as in several disorders. Although current hypotheses regarding the role of central 5-HT remain wide-ranging, a prominent view has pr ...