Following its creation in the lumbar plexus, the obturator nerve goes down through the psoas major muscle, which runs diagonally from the mid-spine to the pelvic bone, and emerges from the muscle’s inner border. The obturator nerve is responsible for the sensation of pressure on the lumbar plexus. Afterwards, it follows the course of the common iliac artery and crosses the pelvic wall.
In the medial thigh, the obturator nerve emerges from the medial side of the psoas muscle and travels across the lesser pelvis to enter the obturator foramen, where it innervates the adductor longus, brevis, and magnus muscles, as well as the gracilis, obturator externus, and pectineus muscles, all of which function to adduct the thigh.
Where is the obturator nerve located in the body?
- Obturator nerve in humans is a branch of the lumbar plexus that emerges from the ventral divisions of the second, third, and fourth lower back nerves.
- The obturator nerve from the third lumbar nerve has the highest diameter, but the branch from the second nerve is frequently extremely tiny.
- The obturator nerve is derived from the anterior divisions of the L2, L3, and L4 spinal nerve roots, which are located in the lower back.
Where does the obturator nerve enter the retroperitoneum?
After emerging from the plexus, the obturator rami fuse and breach the medial border of the psoas muscle to enter the obturator fossa along the lateral wall of the retroperitoneum, where they remain for the rest of their lives. When the obturator nerve traverses the pelvic cavity through the obturator foramen, it is accompanied by the obturator artery and vein, which provide support.
What happens if the obturator nerve is damaged?
- The Obturator Nerve has been damaged.
- An injury to the obturator nerve can occur during surgery affecting the pelvis or the abdominal cavity.
- Some of the symptoms include numbness and paraesthesia on the medial portion of the thigh, as well as weakness while moving the thigh forward.
- Alternatively, the patient may experience difficulties with their posture and gait as a result of the absence of adduction.
What is the correct origin and termination for the obturator nerve?
The obturator nerve is formed when the anterior roots of the spinal nerves L2, L3, and L4 come together at the iliac crest to form a single nerve. As the nerve descends through the fibers of the psoas major muscle, it exits from the medial border of the muscle at the pelvic brim to reach the lesser pelvis, which is located below the greater pelvis.
Where does the obturator nerve innervate?
In the thigh, the obturator nerve is responsible for providing motor innervation to the medial compartment. It is necessary for the adduction of the thigh to occur. Afferents to the medial upper thigh, as well as hip and knee articular branches, are supplied by this nerve.
Where is the obturator nerve found?
Structure. The obturator nerve is derived from the anterior divisions of the L2, L3, and L4 spinal nerve roots, which are located in the lower back. It descends through the fibers of the psoas major and exits from its medial border at the brim of the pelvis, where it attaches to the iliac crest.
Where does the obturator nerve split?
It is possible to separate the obturator nerve into two sections: the anterior and posterior divisions of the obturator nerve. They both innervate the skeletal muscles, and the anterior division of the obturator nerve culminates as the cutaneous branch of the obturator nerve, which is the longest of the three divisions.
What passes through the obturator canal?
The obturator canal is generated when the obturator membrane and the pelvis come together in a tight fit. It is via this canal that the obturator artery, obturator vein, and obturator nerve all pass through.
Is the obturator nerve part of the femoral nerve?
- The femoral nerve is on the left, while the obturator nerve is on the right.
- The psoas major tendon is the white structure that runs between them.
- Both of these nerves derive from the lumbar plexus, which is located up here within the thickness of the psoas major muscle and connects to the rest of the body.
- The femoral nerve arises lateral to the psoas major muscle, whereas the obturator nerve emerges medial to the psoas major.
Where is the left obturator?
Through the smaller sciatic foramen, the urethra leaves the pelvic cavity. A portion of the internal obturator is located within the smaller pelvis, while a portion of it is located at the rear of the hip joint.
|Internal obturator muscle|
|Anatomical terms of muscle|