What Innervates the obturator Externus?

What Innervates the obturator Externus?

Posterior division (posterior to the adductor brevis): Pierces the obturator externus muscle, and then descends in a plane between the adductor brevis and adductor magnus. Innervates the obturator externus and adductor magnus muscles.

What does the anterior obturator nerve innervate?

The anterior branch of the obturator nerve innervates the adductor longus, adductor brevis, and gracilis muscles, as well as giving innervation to the hip joint.

What bone feature does the obturator nerve pass through?

It then passes through an opening in the pelvic bone called the obturator foramen. Inside the foramen, it enters the obturator canal, which carries it into the inner thigh compartment.

What nerve controls leg adduction?

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.

How is obturator Externus treated?

Pain normally disappears with rest of the joint for a couple days or weeks. Treatment of inflammation and discomfort includes the use of ice and NSAIDs, like ibuprofen. The use of corticosteroids is another form of treatment that may provide pain relief for a case of bursitis that does not clear up quickly.

What is the function of the obturator Externus?

The mechanical model demonstrated that the primary action of the obturator externus muscle was to externally rotate the femur when the hip was in neutral position and flexed at 90°. Its secondary function was as an adductor when the hip was in flexion.

How do you test for femoral nerve damage?

Tests that may be done include:

1. Electromyography (EMG) to check the health of the muscles and the nerves that control the muscles.
2. Nerve conduction tests (NCV) to check how fast electrical signals move through a nerve. This test is usually done at the same time as an EMG.
3. MRI to check for masses or tumors.

What causes obturator nerve injury?

Athletes will present with pain, weakness in leg adduction, and sensory loss over a small area in the medial thigh sometimes just with exercise or exacerbated after exercise. Often, obturator neuropathy is caused by pelvic trauma or surgery so athletes should be questioned regarding previous surgery.

What causes obturator internus pain?

The obturator internus can become tensioned or spasmed from overworking, muscle imbalances, injuries, and postural changes. Some symptoms of obturator internus muscle tension include: Hips that feel tight and your feet always seem to be rotated out. Lateral hip pain, can be mistaken for IT band syndrome/bursitis.

Where is the obturator externus muscle located in the thigh?

The obturator externus muscle covers the outer surface of the pelvis. The muscle is flat and fan-shaped. It lies deep in the medial compartment of the thigh (the inner thigh) and is only visible when the pectineus muscle is reflected, or bent backward.

Which is the only muscle innervated by the obturator nerve?

The obturator externus is the only non-adductor muscle innervated by the obturator nerve. This muscle is responsible for rotating the thigh outward. The cutaneous branch of the obturator nerve supplies sensation to the: Some of the skin over the adductor muscles in the inner thigh

Where does the obturator nerve pierce the thigh?

Pierces the obturator externus muscle, and then descends in a plane between the adductor brevis and adductor magnus. Innervates the obturator externus and adductor magnus muscles. The obturator nerve innervates all the muscles in the medial compartment of the thigh – except the hamstring part of the adductor magnus (innervated by the tibial nerve).

What happens to the obturator nerve during surgery?

The cutaneous branch of the obturator nerve supplies the skin of the middle part of the medial thigh. The obturator nerve can be damaged during surgery involving the pelvis or abdomen. Symptoms include numbness and paraesthesia on the medial aspect of the thigh and weakness in adduction of the thigh.