This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Astasia-Abasia is seen in 
Select and explain. 
A. Alzeihmer's disease, B. Parkinsonism, C. Hysterical conversion disorder, D. Schizophrenia
C: Hysterical conversion disorder
Answer: C: Hysterical conversion disorder 
Explanation: (C) Hysterical conversion disorder # Dissociative Motor Disorders> Motor disturbance usually involves either paralysis or abnormal movements.> 'Abnormal movements' range from tremors, choreiform movements, gait disturbances to convulsive movements.> These movements either occur or increase when attention is directed towards them, and may disappear when patient is watched unobserved.> These movements do not fit the 'typical' clinical picture of the abnormal involuntary movement disorders.> Gait disturbance (astasia abasia) is usually characterized by a wide-based, staggering, jerky, dramatic and irregular gait with exaggerated body movements.