Loss of sensation in the anteromedial thigh and medial calf

Introduction In the femoral nerve injury, the high position injury is the sensation loss of the medial anterior medial and calf inner side; the low position injury can be a simple saphenous nerve injury, which shows the sensory disturbance of the medial calf. The femoral nerve comes from the lumbar plexus, descending along the surface of the diaphragm, penetrating the inguinal ligament and dividing it into the anterior and posterior 3-4cm femoral arteries. It occupies the sartorius muscle, the quadriceps muscle, the cutaneous branch to the anterior part and the hidden The innervation of the inner skin of the calf. Femoral nerve injury is rare, and most of them are surgical injuries. The main clinical manifestations after injury are knee extension obstruction caused by quadriceps paralysis and sensory disturbance of anterior and posterior femoral medial. If it is an operation, it should be repaired as soon as possible.

Cause

Femoral nerve injury is less common, with gunshot wounds, stab wounds, and iatrogenic injuries.

an examination

Related inspection

Lumbar and leg pain sensation examination EMG limbs and joints flat film nervous system examination quadriceps muscle strength test

1. No relevant laboratory tests.

2. Electrophysiological examination

The conduction velocity of the affected side of the femoral nerve is slowed down, the amplitude is decreased, the latency of F wave or H reflection is prolonged, the latency of Guo SEP is prolonged, the amplitude is decreased, and the EMG of the nerve-strengthening muscles of the Guo-term femoral nerve is mostly denervated. normal.

Differential diagnosis

Need to be identified with the following symptoms:

Pathological nerve damage: pathological nerve damage is a disease caused by chronic diseases caused by certain diseases. The symptoms are unclear at the time of onset, and only mild neurological symptoms are diagnosed due to diagnosis errors, which often make the disease very serious.

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