The change of limb in posture is often a reflection of fracture, dislocation or serious injury of the muscle and tendon. For example, the patient with fracture of lower limb usually can not stand up and walks uprightly. In the case of injury of the shoulder or the elbow, the patient may hold his sick forearm with his healthy arm and inclines with his body toward the sick side. In the case of injury of the waist, the patient can not move his waist and holds the waist with his arm.