下肢的神经

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Spinal Nerve

The primary nerves of the lower limb are the femoral and sciatic nerves. They stand up from the lumbar and lumbosacral plexus. There may be a few duplications right here with the nerves of the stomach and nerves of the pelvis subjects. But the Femoral nerve is likewise mainly within the lower limb. Below are some of the nerves of lower limb that we discuss in this article.

 

股神经

股神经

 

The femoral nerve is one of the primary peripheral nerves of the lower limb. The femoral nerve is the most important branch of the lumbar plexus. It’s miles derived from the nerve roots L2 – L4.

The nerve descends from the lumbar plexus in the stomach, visiting down via the fibers of psoas essential. The nerve exits psoas important on the decrease part of its lateral border, passing at the back of the iliac fascia to about the mid-factor of the inguinal ligament.

It goes through the femoral triangle sidelong to the femoral vessels (包裹股骨护套内) and emits articular branches to the hip and knee joints. The terminal branch of the femoral nerve is saphenous which keeps the femoral corridor and vein, through the adductor channel.

 

Spinal Nerve

Spinal Nerve

 

The spinal nerves L1 – L4 shape the premise of the lumbar plexus. At each vertebral, paired spinal nerve leaves the spinal twine through the intervertebral foramina of the vertebral section. Each nerve at that point partitions into front and back nerve strands. The lumbar plexus starts because of the anterior fibers of the spinal nerves L1, L2, L3, and L4.

The anterior rami of the spinal roots divide into numerous cords. These cords at that point incorporate by and large to shape the six noteworthy fringe nerves of the lumbar plexus. Those nerves at that point down the back stomach divider to accomplish the lower appendage.

 

The Sciatic Nerve

坐骨神经

 

The sciatic nerve is a major nerve of the lower limb. It is a thick flat band, about 2cm extensive – the most important nerve in the frame. The anatomy of the sciatic nerve is the anatomical path, motor and sensory functions, and its medical correlations.

The sciatic nerve is derived from the lumbosacral plexus. After its formation, it leaves the pelvis and enters the gluteal area via extra sciatic foramen. It emerges inferiorly to the piriformis muscle and descends in an inferolateral path.

As the nerve moves via the gluteal place, it crosses the posterior floor of the advanced gemellus, obdurate internus, and inferior gemellus and quadratus femoris muscle groups. It then enters the posterior thigh via passing deep to the long head of the biceps femoris.

In the posterior thigh, the nerve gives rise to branches to the hamstring muscle mass and Adductor Magnus. Whilst the sciatic nerve reaches the apex of the popliteal fossa, it terminates with the aid of bifurcating into the tibial and not unusual fibular nerves.

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