#conversion disorder

• Abasic — A medical term describing a person affected by abasia, characterized by the partial or total inability to walk or maintain an erect posture, despite muscular strength, sensation, and coordination of the limbs being completely preserved in the recumbent position. It is encountered in organic neurological conditions (frontal or cerebellar lesions, extrapyramidal syndromes) or in psychogenic conversion disorders (classical hysteria, presenting as astasia-abasia syndrome).
• Abasia — A neurological and neuropsychiatric symptom characterized by the total or partial inability to walk, whereas muscular strength, coordination of movements in the recumbent position, and sensation in the legs remain completely intact. It can have an organic cause, linked to lesions of the frontal lobe, cerebellum, or vestibular pathways, or a functional (psychogenic) cause, encountered within conversion (dissociative) disorders, where it is frequently associated with astasia (the inability to stand).