It was observed during the two world wars that many soldiers would report to have become inexplicably paralyzed or blind and therefore were unable to return to the front. most of them seemed unconcerned about their paralysis or blindness. this phenomenon is known as

La belle indifference

Explanation:

La belle indifference an inadequately complement  attitude towards their condition and physical symptoms are seen in patients with conversion disorder. It is a naive or inappropriate calmness lack of concern in the face of perception by others of one's disability and often seen in conversion disorder but no longer considered pathogenic for conversion disorder. To determine the frequency of la belle indifference refers to an apparent lack of concern shown by some patients towards their symptoms. It is often regarded typical conversion /hysteria.

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