<prompt> what is the side effect of vagal nerve stimulationagranulocytosisseizuresmyocarditisvoice change  <response>: Vagus nerve stimulation Electrical stimulation of left vagus nerve Stimulation of raphe nucleus and locus cereleus Release of norepinephrine and serotonin Side effects Voice alteration Ref. kaplon and sadock, synopsis of pychiatry, 11 th edition, 1065 