Nerves Leg (Left)

L Obturator Nerve

The obturator nerve begins at the medial border of the psoas major muscle. It travels through the obturator foramen (an opening in the pelvic bone) before entering the thigh, where it branches into two parts, an anterior branch and posterior branch. The obturator nerve is part of the group of nerves called the anterior lumbar plexus. The nerve provides sensory perception to the skin on the medial side of the thigh. It also provides motor function to the hip and knee joints and the abductor muscles and gracilis.      Source

 

L Femoral Nerve

The largest branch of the lumbar plexus that in humans comes from the second, third, and fourth lumbar nerves and supplies extensor muscles of the thigh and skin areas on the front of the thigh and medial surface of the leg and foot and that sends articular branches to the hip and knee joints. The nerve signals carried by the femoral nerve are crucial to the function of the legs, including standing, walking, and running. Also called anterior crural nerve.     Source

 

L Sciatic Nerve

Is a large nerve in humans and other animals. It begins in the lower back and runs through the buttock and down the lower limb. It is the longest and widest single nerve in the human body, going from the top of the leg to the foot on the posterior aspect. The sciatic nerve provides the connection to the nervous system for the skin of the leg, the muscles of the back of the thigh, and those of the leg and foot. The sciatic nerve supplies sensation to the skin of the foot, as well as the entire lower leg. It is derived from spinal nerves L4 to S3. It contains fibers from both the anterior and posterior divisions of the lumbosacral plexus.

 

L Posterior Femoral Cutaneous

The posterior femoral cutaneous nerve, also known as the posterior cutaneous nerve of the thigh, is a sensory branch of the sacral plexus. It arises from anterior and posterior divisions of anterior rami of S1, S2 and S3 nerves. It supplies the skin of the posterior thigh, buttock and the posterior scrotum/labia. The posterior femoral has 3 branches: The cutaneous branch, gluteal branch, perineal branch. the cutaneous branch supplying the posterior thigh, the gluteal branch, also known as the inferior cluneal nerve, and is derived from posterior divisions of the S1 and S2 anterior rami and it supplies the skin over the inferior half of the buttock, the perineal branch advances medially to supply the posterior part of the scrotum or labia majora.     Source

 

L Lateral Sural Cutaneous

This supplies the skin on the posterior and lateral surfaces of the leg.

 

L Superficial Peroneal Nerve

Supplies the peroneus longus and peroneus brevis muscles and the skin over the antero-lateral aspect of the leg along with the greater part of the dorsum of the foot (with the exception of the first web space, which is innervated by the deep peroneal nerve).

 

L Sural Communicating Branch

The sural communicating branch of common peroneal nerve is a nerve which gives rise to the sural nerve. The sural nerve is a sensory nerve in the calf region (sura) of the leg. It is made up of collateral branches of the tibial nerve and common fibular nerve. Two cutaneous branches, the medial and lateral, form the sural nerve.

 

L Lateral Femoral Cutaneous

This is a cutaneous nerve that supplies the skin on the lateral part of the thigh.

 

L Common Peroneal Nerve

This is a nerve in the lower leg that provides sensation and motor function to parts of the lower leg. When damaged or compressed, it can cause foot drop.

 

L Saphenous Nerve

This is the largest cutaneous branch of the femoral nerve. It is a strictly sensory nerve, and has no motor function.

 

L Tibial Nerve

The tibial nerve is a branch of the sciatic nerve. it supplies the deep muscles of the posterior leg. The tibial nerve supplies all the muscles in the posterior compartment of the leg. They are divided into a deep and superficial compartment the compartments are, Popliteus – Laterally rotates the femur on the tibia to unlock the knee, Flexor Hallucis Longus – Flexes the big toe and plantar flexes the ankle, Flexor digitorum Longus – Flexes the other digits and plantar flexes the ankle, Tibialis Posterior – Inverts the foot and plantar flexes the ankle.

 

L Medial Sural Nerve

Medial sural cuteus nerve, the tibial nerve just below knee joint gives rise to medial sural cutaneous nerve, which runs downward across union of heads of gastrocnemius.  it is joined by peroneal communicating branch from common peroneal nerve (which may arise w/ lateral sural cutaneuos), thus forming sural nerve.     Source

 

L Deep Peroneal Nerve

The deep peroneal/fibular nerve supplies some muscles in the leg, which are essential for normal gait and movement of the ankle.     Source

 

L Intermediate Dorsal Cutaneous

It passes along the lateral part of the dorsum of the foot, and divides into dorsal digital branches, which supply the contiguous sides of the third and fourth, and of the fourth and fifth toes. It also supplies the skin of the lateral side of the foot and ankle, and communicates with the sural nerve. The branches of the superficial peroneal nerve supply the skin of the dorsal surfaces of all the toes excepting the lateral side of the little toe, and the adjoining sides of the great and second toes, the former being supplied by the lateral dorsal cutaneous nerve from the sural nerve, and the latter by the medial branch of the deep peroneal nerve.

 

L Plantar Nerve

The medial plantar nerve supplies: the abductor hallucis, the flexor digitorum brevis, the flexor hallucis brevis and the first lumbrical. Cutaneous distribution of the medial plantar nerve is to the medial sole and medial three and one-half toes, including the nail beds on the dorsum. The lateral plantar nerve supplies quadratus plantae, flexor digiti minimi brevis, adductor hallucis, the dorsal and plantar interossei, three lateral lumbricals and abductor digiti minimi. Cutaneous innervation is to the lateral sole and lateral one and one-half toes.