What is inferior oblique myectomy?

What is inferior oblique myectomy?

Myectomy. Inferior oblique myectomy typically involves the surgical removal of a segment of muscle between the NFVB and the insertion of the muscle. 23,41. The muscle segment is cauterized prior to removal. The primary advantage is convenience as this procedure is faster than a recession.

What does the inferior oblique do in the eye?

The inferior oblique muscle externally rotates, elevates, and abducts the eye.

What is oblique surgery?

Surgery to weaken the inferior oblique muscle, by either removing a segment from the muscle or changing the position it attaches to the eyeball is the most commonly performed operation for a superior oblique palsy. In 80% of congenital palsies a successful outcome is achieved with this single operation.

What causes inferior oblique Overaction?

Secondary oblique overaction is caused by a paresis of the antagonist muscle. A superior oblique paresis results in inferior oblique overaction, and inferior oblique paresis results in superior oblique overaction.

What is inferior oblique?

The inferior oblique is the only extraocular muscle to have its anatomic origin in the anterior orbit. The muscle runs from the medial corner of the orbit to the lateral aspect of the globe, its length approximately paralleling the tendon of insertion of the superior oblique muscle.

How do you fix superior oblique palsy?

The treatment of choice for congenital superior oblique palsy and for an unresolved (after 6 months) acquired palsy is typically eye muscle surgery. Surgery usually minimizes double vision, reduces the unsightly upward drift of an eye, and corrects a compensatory head tilt.

Where does the inferior oblique insertion?

Inferior oblique muscle

How does inferior oblique elevate eye?

Thus the inferior oblique simultaneously exhibits three actions on the eyeball: Elevates the anterior part of the eyeball; by depressing the posterior part of the eyeball, particularly when the eye is adducted. Abducts the eyeball laterally. Externally rotates the eyeball.

Does inferior oblique have Trochlea?

The trochlea acts as a pulley. The superior oblique tendon fans out, passing deep to the superior rectus to insert into the sclera on the top of the eyeball. Here’s the inferior oblique, inserting into the sclera between the lateral rectus and the inferior rectus muscles.

What can cause superior oblique palsy?

A common cause of acquired superior oblique palsy is head trauma, including relatively minor trauma. A concussion or whiplash injury from a motor vehicle accident may be sufficient enough to cause the problem. Rare causes of superior oblique palsy are stroke, tumor and aneurysm.

What does the inferior oblique muscle of the eye do?

The inferior oblique muscle is one of six thin, extraocular muscles responsible for eye movement. Arising from the maxillary bone on the inner floor of the eye socket, the inferior oblique muscle courses forward to attach to the sclera of the eye at a point between two muscles that connect to…

Where is the inferior oblique located?

Inferior Oblique: The inferior oblique is a paired muscle located in the eye area. The inferior oblique is attached directly to the eye and elevates, laterally rotates, and abducts the eye.

What is eye movement caused by the superior oblique?

Superior Oblique Myokymia. The abnormal movements may occur spontaneously or immediately following a downward eye movement. The contraction of the superior oblique muscle may also produce transient vertical diplopia, because a tonically contracting superior oblique muscle will depress the affected eye.

Is the inferior oblique a vertical muscle?

There are technically only two vertical muscles in one eye, but CPT considers the inferior oblique muscle a vertical muscle for coding purposes. The superior oblique muscle has its own code, 67318 (strabismus surgery, any procedure, superior oblique muscle).