Rosy visited a doctor with a peculiar condition. She seemed to have lost the ability to use her arm. She complained that it had become numb and completely paralyzed. However, the doctor could not find a biological cause that could explain her condition. Rosy is most likely to be suffering with?

Conversion disorder consists of neurological symptoms or deficits that develop unconsciously rather than volitionally, usually involving motor or sensory function. Manifestations are incompatible with known pathophysiological mechanisms or anatomical pathways. Onset, exacerbation or maintenance of conversion symptoms is commonly attributed to mental factors such as stress. The diagnosis is based on history, after excluding physical disorders as the cause. Treatment begins with establishing a consistent and supportive doctor-patient relationship; psychotherapy can help, as can hypnosis.

The symptoms are often develop abruptly and onset can often be associated with a stressful event. They typically involve apparent deficits in voluntary or sensory motor function, but sometimes include tremors and impaired consciousness (suggesting seizures) and abnormal limb mannerisms (suggesting another general physical or neurological disorder). For example, patients may have impaired coordination or balance, weakness or paralysis of an arm or leg, or loss of sensation in a body part, seizures, unresponsiveness, blindness, double vision, deafness, aphonia, difficulty swallowing, sensation of a ball in the throat and urinary retention.