Serotonergic lesions of the periaqueductal gray, a primary source of serotonin to the nucleus paragigantocellularis, facilitate sexual behavior in male rats

►Ventrolateral periaqueductal gray serotonin lesions facilitate ejaculation. ►Ventrolateral periaqueductal gray serotonin lesions do not alter sexual motivation. ►Periaqueductal gray serotonin is an important regulator of genital reflexes.