Obturator Nerve Block
The anaesthetic is injected inferior to the pubic tubercle and lateral to the tendon of the adductor longus muscle. This procedure can also be carried out under ultrasound guidance. The obturator nerve is a major peripheral nerve of the lower limb.


What causes obturator pain? Obturator neuropathy is a difficult clinical problem to evaluate. One possible cause of pain is due to fascial entrapment of the nerve. Symptoms include medial thigh or groin pain, weakness with leg adduction, and sensory loss in the medial thigh of the affected side.

what does the obturator nerve supply?

The obturator nerve (L2–L4) supplies the pectineus; adductor (longus, brevis, and magnus); gracilis; and external obturator muscles. This nerve controls adduction and rotation of the thigh. A small cutaneous zone on the internal thigh is supplied by sensory fibers.

What muscles does the obturator artery supply? Supply. The obturator artery supplies the pelvic muscles it crosses, the head of the femur, the muscles of the medial compartment of the thigh and gives a small branch to the knee capsule. The iliac branch supplies the bone and the iliacus muscle. It also has a cutaneous supply to the medial thigh.

where is the obturator nerve?

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.

What is obturator nerve entrapment? Entrapment of the obturator nerve is an under-recognized and rarely taught cause of groin, thigh, and knee pain. Obturator nerve dysfunction can mimic hip pathology, groin strain, and claudication.

which main structure does the obturator nerve supply?

Obturator nerve. The obturator nerve (latin: nervus obturatorius) is mixed nerve that originates from the lumbar plexus and innervates the muscles and skin in the medial region of the thigh. The obturator nerve arises from the ventral rami of the second, third and fourth lumbar nerves (L2 - L4).

What is the obturator sign? The obturator sign or Cope's obturator test is an indicator of irritation to the obturator internus muscle. The technique for detecting the obturator sign, called the obturator test, is carried out on each leg in succession. The patient lies on her/his back with the hip and knee both flexed at ninety degrees.

How do you treat obturator nerve pain?

For anterior obturator nerve entrapment, treatment may consist of electrical stimulation of the adductor and hip flexor muscles, stretching, and massage. These modalities, however, typically have not been successful in resolving this condition if it is not recognized early.

What does the sciatic nerve branch into? The sciatic nerve is derived from the lumbosacral plexus. Within the posterior thigh, the nerve gives rise to branches to the hamstring muscles and adductor magnus. When the sciatic nerve reaches the apex of the popliteal fossa, it terminates by bifurcating into the tibial and common fibular nerves.

What does the obturator muscle do?

Obturator internus. Its primary function is to help move the thigh away from the center of the body by rotating it in a sideways direction. When the thigh is flexed, it assists other muscles in moving the thigh outward, away from the midline of the body. It also helps to stabilize the hip joint.

What nerve passes through the obturator foramen?

The obturator canal is a passageway formed in the obturator foramen by part of the obturator membrane. It connects the pelvis to the thigh. The obturator artery, obturator vein, and obturator nerve all travel through the canal.

What is obturator hernia?

An obturator hernia is a rare type of hernia of the pelvic floor in which pelvic or abdominal contents protrudes through the obturator foramen. The Howship–Romberg sign is suggestive of an obturator hernia, exacerbated by thigh extension, medial rotation and abduction.

What nerve supplies obturator Internus?

The nerve to obturator internus arises from the anterior divisions of the sacral plexus. It is formed from the L5-S2 nerve roots and exits the pelvis via the greater sciatic foramen inferior to the piriformis muscle and typically between the posterior cutaneous nerve of the thigh and the pudendal nerve.

What is the nerve plexus of the tibial nerve?

The tibial nerve is a branch of the sciatic nerve. The tibial nerve passes through the popliteal fossa to pass below the arch of soleus. Tibial nerve Nerves of the right lower extremity Posterior view. Details From sacral plexus via sciatic nerve To medial plantar nerve, lateral plantar nerve

Where is the femoral nerve?

The femoral nerve is one of the largest nerves in your leg. It's located near the groin and controls the muscles that help straighten your leg and move your hips. It also provides feeling in the lower part of your leg and the front of your thigh.

What is lumbar plexus?

The lumbar plexus is a web of nerves (a nervous plexus) in the lumbar region of the body which forms part of the larger lumbosacral plexus. It is formed by the divisions of the first four lumbar nerves (L1-L4) and from contributions of the subcostal nerve (T12), which is the last thoracic nerve.

What does the femoral nerve supply?

The femoral nerve is the largest branch of the lumbar plexus and provides motor innervation to the anterior thigh (quadriceps). The deep branch supplies the quadriceps. The superficial branch divides into the medial cutaneous and anterior cutaneous nerve of the thigh.

Which nerve from the cervical plexus causes contraction of the diaphragm?

phrenic nerve