Where is the superior rectus muscle located?
Superior rectus is one of the extrinsic muscles of the eye. Being located outside the eyeball but within the orbit, it belongs to a group called the extraocular muscles. This group of muscles serves to move the eyes within the orbit.
Where is the lateral rectus in the eye?
orbit
The lateral rectus muscle arises from the common tendinous ring and runs anteriorly and across the lateral part of the orbit to insert at the lateral side of the eyeball. Like other straight muscles, the lateral rectus is named by its position within the orbit relative to the eyeball.
Where does superior rectus attach?
The superior rectus muscle originates from the annulus of Zinn. It inserts into the anterosuperior surface of the eye. This insertion has a width of around 11 mm. It is around 8 mm from the corneal limbus.
Where are the superior and inferior rectus muscles?
The inferior rectus’ insertion was attached to the eyeball’s anteroinferior surface, while the superior rectus muscle’s insertion was located on its anterosuperior surface (both muscles’ insertions were located anterior to the equator of the eyeball).
Where is the inferior rectus muscle located?
The inferior rectus muscle passes along the floor of the orbit superior to the infraorbital canal, which houses the infraorbital artery. As it inserts onto the anteromedial part of the sclera, the inferior rectus muscle is covered by the inferior oblique muscle.
Where are your eye muscles located?
EXTRAOCULAR MUSCLES: These muscles originate in the eye socket (orbit) and work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye. It moves the eye upward.
What does the superior rectus muscle do?
The superior rectus has a primary action of elevating the eye, causing the cornea to move superiorly. The superior rectus originates from the annulus of Zinn and courses anteriorly and superiorly over the globe, making an angle of 23 degrees with the visual axis.
Where are the eye muscles located?
EXTRAOCULAR MUSCLES: These muscles originate in the eye socket (orbit) and work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye.
Where is the levator eye muscle located?
Levator palpebrae superioris is a triangular muscle that extends along the roof of the orbit, from the apex of orbit to the superior eyelid. It originates with a short and narrow tendon from the inferior aspect of the lesser wing of sphenoid bone, superior and anterior to the common tendinous ring.
Where is the inferior rectus in the eye?
The inferior rectus muscle is a muscle in the orbit near the eye. It is one of the four recti muscles in the group of extraocular muscles. It originates from the common tendinous ring, and inserts into the anteroinferior surface of the eye. It depresses the eye (downwards).
How does the superior rectus move the eye?
The superior rectus and inferior oblique muscles primarily move the eye upward. The inferior rectus and superior oblique muscles primarily move the eye downward. The lateral rectus moves the eye horizontally laterally (abduction). The medial rectus muscle moves the eye horizontally medially (adduction).
How does the superior rectus muscle move the eye?
Where is the inferior rectus muscle?
What is the function of superior rectus muscle?
What is 6th nerve palsy a symptom of?
Other signs and symptoms may include double vision, headaches, and pain around the eye. Sixth nerve palsy may be caused by many things, including stroke, brain aneurysm, diabetic neuropathy, trauma, infections, inflammation, tumors, migraine headaches or intracranial pressure.
Where is the lateral rectus muscle located?
The lateral rectus muscle extends along the lateral wall of the orbit. It arises from the lateral part of the common tendinous ring near the attachments of the medial, lateral and superior recti muscles.
What does the lateral rectus do in the eye?
Lateral rectus muscle (Musculus rectus lateralis) Lateral rectus muscle is one of the 4 straight muscles of the orbit responsible for the movement of the eye in the cardinal directions. These muscles, along with the superior and inferior oblique muscles, belong to the extraocular muscles of the eye.
What is the function of the superior rectus?
Respectively, the recti muscles insert onto the superior, inferior, medial and lateral sides of the eyeball. Based on their global attachments, these muscles serve to move the eyes in the four cardinal directions, with superior rectus producing elevation, adduction and internal rotation of the eyeball.
What is the line of insertion for the superior rectus?
The line of insertion is oblique, with medial fibers attaching more anterior than the lateral. The originating fibers of superior rectus are located inferolaterally to superior oblique and inferomedially to the levator palpebrae superioris muscle.