What term describes when a person loses control of body functions in response to traumatic stress?

The term "conversion hysteria" refers specifically to a psychological condition where a person experiences physical symptoms that arise as a response to psychological trauma or stress. In cases of conversion hysteria, individuals may lose control over bodily functions such as movement, sensation, or other physiological responses, despite the absence of any underlying physical illness. This phenomenon is particularly relevant in understanding how traumatic experiences can manifest in physical ways, illustrating the deep connection between the mind and body.

In the context of this question, conversion hysteria is the most appropriate choice because it captures the essence of how emotional distress can lead to significant and functional physical impairment, distinguishing it from other terms which do not encapsulate the same direct response to trauma. For instance, a panic attack primarily involves symptoms related to intense fear or anxiety but does not necessarily cause loss of bodily control in the manner described. Similarly, psychogenic movement disorder encompasses a broader range of movement issues without explicitly tying them to traumatic stress. Cognitive dissonance, on the other hand, involves mental discomfort due to conflicting beliefs or behaviors rather than a physical response to trauma.