What does the superior oblique muscle of the eye do?
What does the superior oblique muscle of the eye do?
These muscles are unique in that they do not originate from the common tendinous ring, have an angular attachment to the eyeball, and they attach to the posterior aspect of the eyeball. The superior oblique functions explicitly to move the eye in the down-and-out position and intort the eye.
What action does superior rectus 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.
What is the superior oblique of the eye?
The superior oblique is a fusiform (spindle-shaped) muscle belonging to the extraocular group of muscles. It originates near the nose. Along with the other extraocular muscles, it performs the role of controlling eye movements.
What is the superior rectus muscle?
Superior rectus muscle (Musculus rectus superior) 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.
How does the superior rectus move the eye?
The superior rectus is an extraocular muscle that attaches to the top of the eye. It moves the eye upward. The inferior rectus is an extraocular muscle that attaches to the bottom of the eye. It moves the eye downward.
How do you test superior rectus?
The lateral and medial rectus muscles are tested by asking the patient to look to the right then to the left. The actions of the superior and inferior rectus muscles are isolated by testing them when the optic axis is aligned along the orbital axis, (requiring the patient to look laterally) one eyeball at a time.
Where is the superior oblique muscle located?
orbit
The superior oblique muscle, or obliquus oculi superior, is a fusiform muscle originating in the upper, medial side of the orbit (i.e. from beside the nose) which abducts, depresses and internally rotates the eye. It is the only extraocular muscle innervated by the trochlear nerve (the fourth cranial nerve).
What causes 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 muscle do you use to kiss?
Kissing can involve a variety of different facial muscles, with the orbicularis oris being the main skeletal muscle involved.