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The lateral femoral cutaneous nerve (LFCN) originates from the lumbar plexus and contains fibers from lumbar nerves L2 and L3. [7] [4] [2] [3] The LFCN then traverses to the lateral border of the psoas major muscle, crosses the iliacus muscle, and continues to the anterior superior iliac spine (bony landmark).
The femoral nerve stretch test can identify spinal nerve root compression, which is associated with disc protrusion and femoral nerve injury. It can reliably identify spinal nerve root compression for L2, L3, and L4. [2]
Entrapment of the lateral cutaneous nerve of the thigh is caused by compression of the nerve near the anterior superior iliac spine and the inguinal ligament. [2] This causes meralgia paraesthetica (Bernhardt-Roth syndrome). [2] [5] This may be diagnosed with ultrasound, which changes the morphology of the nerve. [1]
The femoral nerve is the major nerve supplying the anterior compartment of the thigh. It is the largest branch of the lumbar plexus, and arises from the dorsal divisions of the ventral rami of the second, third, and fourth lumbar nerves (L2, L3, and L4).
Image of femoral nerve and its innervations of muscles . The femoral nerve is the largest nerve of the lumbar plexus. [3] It is located in the pelvis, and travels down at the front of the leg. [3] The nerve has several branches given its origin from the lumbar spine, down the pelvis and further into the lower spine. [3]
The timing/duration of symptoms may be continuous, intermittent, and/or positional. This is dependent on the underlying cause of entrapment and the specific nerves involved. For example, pain while sitting is associated with inferior cluneal nerve entrapment, pudendal nerve entrapment, and anococcyeal nerve entrapment. [11] [12] [13]
Brooklyn Nets guard/forward Ben Simmons has a nerve impingement in his back and is sidelined indefinitely. Simmons has missed the past three games with a hip contusion.
The intermediate cutaneous nerve (middle cutaneous nerve) pierces the fascia lata (and generally the sartorius) about 7.5 cm below the inguinal ligament, and divides into two branches which descend in immediate proximity along the forepart of the thigh, to supply the skin as low as the front of the knee.