Hysterical aphonia is a functional disorder. It is not organic laryngeal paralysis. Patient with hysterical aphonia can not adduct the vocal cords when attempting to speak. Psychogenic condition subh as emotional may cause aphonia. The patient hopes to be relieved of an unpleasant duty through loss of his voice.  We can take an example ; if the amateur speaker is unable to prepare his topic,he will become aphonia. This condition make he able to cancel his speech without embarrasment.