Stimulation of which of the nerve leads to elevated mood

B i.e. OlfactoryVagus nerve > olfactory nerve stimulation leads to improved mood. Patients with chronic recurrent major depressive disorder went in remission when treated with (left) vagal nerve stimulation.Olfactory system play role in satiety. Strong stimulation of olfactory bulbs in nose with food odors by use of an inhalar saturated with a paicular smell produces satiety for that food.Olfactory nerve lies on orbitofrontal pa of brain, stimulation of which leads to manic like symptoms such as euphoria & laugh.