Loss of sensation in the medial calf is one of the symptoms of a high level femoral nerve injury. High femoral nerve injury presents as loss of sensation in the anterior medial femur and medial calf. Muscle and joint position sensation, motion sensation, and vibration sensation. If the nerve fiber that conducts deep sensation or the sensory center of the brain is damaged, muscle and joint position sensation and motion are present. Examination items for medial calf sensory loss: 1. Nociception Nociception (algesia) The patient’s skin is usually pricked lightly with uniform force by the tip of a large-headed needle, and the patient is asked to state the specific sensation immediately. To avoid subjective or suggestive effects, the patient should be tested with his or her eyes closed. The type (normal, allergic, hyperalgesia, disappearance) and range of sensory disturbance are recorded after the test. 2.Temperature sensation Temperature sensation (thalposis) is usually tested with a test tube containing hot water (40~50℃) and cold water (5~10℃), and the patient is asked to answer how he/she feels (cold or hot). Superficial sensory examination refers to the examination of superficial pain, temperature and touch sensation of the skin and mucous membranes for abnormalities. If the nerve fibers that conduct stimuli or the sensory centers of the brain are damaged due to pain, temperature and touch, then it is a superficial sensory disorder. 4.Kinesthesia Kinesthesia is also called kinesthesia, which is the internal sensation of the subject to identify his own posture and the movement of a part of the body. 5.Bone imaging Bone imaging can diagnose bone tumor and bone metastasis 3-6 months earlier than X-ray examination, but it should be noted that this method is highly sensitive and low specificity.