Conversion disorder is a condition in which the patient's senses or ability to walk or move are impaired without a recognized medical or neurological disease or cause and in which psychological factors (such as stress or trauma) are judged to be temporarily related to onset or exacerbation. The disorder gets its name from the notion that the patient is converting a psychological conflict or problem into an inability to move specific parts of the body or to use the senses normally. An example of a conversion reaction would be a patient who loses his or her voice in a situation in which he or she is afraid to speak. The symptom simultaneously contains the anxiety and serves to get the patient out of the threatening situation. The resolution of the emotion that underlies the physical symptom is called the patient's primary gain, and the change in the patient's social, occupational, or family situation that results from the symptom is called a secondary gain. Doctors sometimes use these terms when they discuss the aftereffects of conversion disorder or of other somatoform disorders on the paient's emotional adjustment and lifestyle.

The specific physical symptoms of conversion disorder may include a loss of balance or paralysis of an arm or leg; the inability to swallow or speak; the loss of touch or pain sensation; going blind or deaf; seeing double; or having hallucinations, seizures, or convulsions.

Unlike somatization disorder, conversion disorder may begin at any age, and it does not appear to run in families. It is estimated that as many as 34% of the population experiences conversion symptoms over a lifetime, but that the disorder is more likely to occur among less educated or sophisticated people. Conversion disorder is not usually a chronic disturbance; 90% of patients recover within a month, and most do not have recurrences. The female-to-male ratio is between 2:1 and 5:1. Male patients are likely to develop conversion disorders in occupational settings or military service.

By Max Powers

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