What is the function of inferior oblique muscle?
The inferior oblique muscle externally rotates, elevates, and abducts the eye.
What is superior oblique Overaction?
Definition. An ocular motility abnormality characterized by an overacting superior oblique muscle resulting to vertical incomitance of the eyes in lateral gaze.
What is the primary action of the inferior oblique extraocular muscle?
Action. In the neutral position, the primary action of the inferior oblique is to externally rotate the eye (see figure 1) 2. However, because the apex of the orbit is placed medially in the skull, the orbital axis does not correspond with the optical axis of the eye in its neutral position.
What is the function of inferior rectus?
The inferior rectus has a primary action of depressing the eye, causing the cornea and pupil to move inferiorly. The inferior rectus originates from the Annulus of Zinn and courses anteriorly and laterally along the orbital floor, making an angle of 23 degrees with the visual axis.
What is the function of the superior oblique muscle?
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 is the function of superior oblique muscle?
Where is the inferior oblique located?
anterior orbit
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 does the inferior oblique abduct?
Inferior oblique is a thin, narrow muscle of the eye. The primary action of this muscle is to elevate and abduct (laterally move) the eyeball. It acts in a coordinated manner with the other extraocular muscles to control the movements of the eye; positioning the pupil and adjusting the direction of the gaze.
What cranial nerve Innervates the inferior oblique muscle?
the oculomotor nerve
The inferior oblique is innervated by the inferior division of the oculomotor nerve, which enters the muscle on its upper surface.
What is the function of lateral rectus?
Structure and Function The lateral rectus muscle is an abductor and moves the eye laterally, and side to side along with the medial rectus, which is an adductor.