“Instead of being experienced consciously (either diffusely or displaced, as in phobias) the impulse causing the anxiety is "converted" into functional symptoms in organs or parts of the body, usually those that are mainly under voluntary control. The symptoms serve to lessen conscious (felt) anxiety and ordinarily are symbolic of the underlying mental conflict. Such reactions usually meet immediate needs of the patient and are, therefore, associated with more or less obvious "secondary gain." They are to be differentiated from psychophysiologic autonomic and visceral disorders. The term "conversion reaction" is synonymous with "conversion hysteria." Dissociative reactions are not included in this diagnosis. In recording such reactions the symptomatic manifestations will be specified as anesthesia (anosmia, blindness, deafness), paralysis (paresis, aphonia, monoplegia, or hemiplegia), dyskinesis (tic, tremor, posturing, catalepsy).” PsychiatryHysteriaDsmConversion DisorderConversion HysteriaDyskinesisPsychogenic Blindness Book:DSM I: Diagnostic and Statistical Manual Mental Disorders Source: DSM I: Diagnostic and Statistical Manual Mental Disorders