Where is the levator palpebrae superioris located?
The levator palpebrae superioris muscle origin is the periosteum of the lesser wing of the sphenoid bone, superior to the optic foramen. The muscle travels anteriorly along the superior aspect of the orbit superior to the superior rectus muscle.
How do you test for levator palpebrae superioris?
The examiner is positioned 2–3 feet in front of the patient’s face to allow for clear observation of the patient’s eyes. The patient is instructed to tightly squeeze his or her eyelids shut for five to ten seconds. This not only relaxes the levator palpebrae superioris but actively inhibits it.
Where is the Palpebrae in the eye?
eyelids
The palpebral are the upper and lower eyelids, which make up the shape of the eye. A line drawn from the inner corner to the outer corner determines the slant of the eye, or palpebral slant. Slanting and a fold of skin (epicanthal fold) are normal in people of Asian descent.
Where is the eyelid muscle located?
The orbicularis muscle is located just underneath the skin of the eyelid. In general, the muscle attaches to the medial canthal region medially and the lateral canthal region laterally. The orbicularis oculi muscle is divided into two sections, the orbital and palpebral sections.
What nerve controls the levator palpebrae superioris?
the oculomotor nerve
The striated levator palpebrae superioris (LPS) muscle is innervated by the oculomotor nerve, and has a common origin with the superior rectus muscle. Anteriorly, it becomes the levator aponeurosis as it passes anterior to Whitnall ligament, and inserts into the anterior tarsal surface.
How do you test levator function?
Levator function is measured by having the patient look down, and with a hand on the patient’s forehead to prevent any brow action, asking the patient to look upward as far as possible without a change in head position. The distance the upper lid margin elevates in millimeters is the levator muscle function.
How do you check the levator function?
How can you tell the difference between ptosis and Pseudoptosis?
Characteristically, pseudoptosis patients with orbicularis spasm have a depressed eyebrow with variable ability to elevate the frontalis muscle, compared to organic ptosis patients who generally exhibit frontalis muscle overactivity to compensate for true ptosis.
What is the function of the palpebrae?
Excerpt. The levator palpebrae superioris is a triangular-shaped muscle located in each upper eyelid. The primary function is elevation and retraction of the upper eyelid.
Is levator palpebrae superioris skeletal muscle?
It broadens and decreases in thickness (becomes thinner) and becomes the levator aponeurosis. This portion inserts on the skin of the upper eyelid, as well as the superior tarsal plate. It is a skeletal muscle.
What type of muscle is levator palpebrae superioris?
The levator palpebrae superioris muscle is a small muscle of the superior orbit that elevates and retracts the upper eyelid. It is not part of the extraocular muscles; it does not insert on the globe and therefore does not produce eye movements. But it is considered to be one of the facial muscles.
What causes ptosis in Horner’s syndrome?
Superior tarsal muscle is responsible for keeping the upper eyelid in a raised position after levator palpebrae superioris raises it. This explains the partial ptosis seen in Horner syndrome.