Symptoms of posterior femoral cutaneous nerve injury

summary

The femoral nerve originates from the lumbar plexus and consists of the posterior thigh of the anterior branches of the L2, L3 and L4 nerves. It passes out from the outer edge of psoas major muscle, goes down obliquely to the deep surface of ilium fascia, reaches the femoral fascia sheath between psoas major muscle and ilium muscle, and gives out ilium muscle branch and psoas major muscle branch in iliac fossa. The main trunk passes through the deep surface of inguinal ligament and the surface of iliopsoas muscle, enters the femoral triangle from muscle space, and is located at the lateral side of femoral artery. Symptoms of posterior femoral cutaneous nerve injury? Let's talk about it

Symptoms of posterior femoral cutaneous nerve injury

Dyskinesia, paralysis of anterior thigh muscle group, difficulty in raising leg when walking, inability to extend leg, sensory disturbance, skin sensory disturbance of anterior thigh and medial side of leg, atrophy of quadriceps femoris, patella protrusion, disappearance of knee reflex.

Electromyography showed that the conduction velocity of affected femoral nerve was slowed down, the amplitude was decreased, and the latency of F wave or H wave was prolonged. The latency, amplitude and interval of SEP were prolonged. The electromyography of the muscles innervated by the femoral nerve was mostly denervated potential, but the healthy side was normal.

The diagnosis of lateral femoral cutaneous nerve injury mainly depends on clinical manifestations, that is, hypoesthesia in the anterolateral femoral region. At the same time, it is necessary to exclude lumbar diseases, and combine with cortical somatosensory evoked potential when necessary. After injury, in principle, the earlier treatment, the better prognosis. The combination of non-surgical treatment and surgical treatment is often used. Maintain limb circulation, joint range of motion and muscle tension to prevent deformity and trauma.

matters needing attention

According to the characteristics and changes of EMG, we can qualitatively judge the situation of femoral nerve injury, analyze the causes of femoral nerve injury, and repair the femoral nerve injury through hematoma elimination, nerve relaxation, nerve suture and nerve transplantation.