Unlike hypochondriasis, in which there is no physical problem, conversion disorders involve an actual physical disturbance, such as the inability to see or hear or to move an arm or leg. The cause of such a physical disturbance is purely psychological; there is no biological reason for the problem. Some of Freud’s classic cases involved conversion disorders. For instance, one of Freud’s patients suddenly became unable to use her arm, without any apparent physiological cause. Later, just as abruptly, the problem disappeared.

Webster Dictionary Meaning

1. Conversion
- The act of turning or changing from one state or condition to another, or the state of being changed; transmutation; change.
- The act of changing one's views or course, as in passing from one side, party, or from of religion to another; also, the state of being so changed.
- An appropriation of, and dealing with the property of another as if it were one's own, without right; as, the conversion of a horse.
- The act of interchanging the terms of a proposition, as by putting the subject in the place of the predicate, or the contrary.
- A change or reduction of the form or value of a proposition; as, the conversion of equations; the conversion of proportions.
- A change of front, as a body of troops attacked in the flank.
- A change of character or use, as of smoothbore guns into rifles.
- A spiritual and moral change attending a change of belief with conviction; a change of heart; a change from the service of the world to the serv
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