The study of neurohypophyseal function in various neuropsychiatric dis
eases is interesting because: (1) The main neurohypophyseal peptides v
asopressin (AVP) and oxytocin (OT) share by themselves modulatory infl
uence on behavior. (2) Hypothalamo-posterior pituitary axis is directl
y influenced by modifications of central neurotransmitter metabolism i
nvolved in behavior control.