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The inferior rectus muscle is supplied by an inferior muscular branch of the ophthalmic artery. [1] It may also be supplied by a branch of the infraorbital artery. [1] It is drained by the corresponding veins: the inferior muscular branch of the ophthalmic vein, and sometimes a branch of the infraorbital vein. [1]
Oblique Superior and inferior 2 1 rectus, inferior: head, eye, orbit (left/right) annulus of Zinn at orbital apex 6.5 mm inferior to corneal limbus: ophthalmic artery: oculomotor nerve [CNIII], inferior branch: adducts and depresses eye: Oblique Superior and inferior 2 1 rectus, medial: head, eye, orbit (left/right) annulus of Zinn at orbital apex
Medial rectus muscle, 43. Lateral rectus muscle, 44. Sphenoid bone. There are many diseases, disorders, and age-related changes that may affect the eyes and surrounding structures. As the eye ages, certain changes occur that can be attributed solely to the aging process. Most of these anatomic and physiologic processes follow a gradual decline.
gemellus inferior; obturator externus; quadratus femoris; Sartorius; of leg at knee [3] Biceps femoris; of eyeball (motion is also called "extorsion" or excyclotorsion) [4] Inferior rectus muscle; Inferior oblique muscle
The last muscle is the inferior oblique, which originates at the lower front of the nasal orbital wall, passes inferiorly over the inferior rectus muscle on its path laterally and posteriorly, and inserts under the lateral rectus muscle on the lateral, posterior part of the globe. Thus, the inferior oblique pulls the eye upward and laterally.
The inferior branch of the oculomotor nerve or the inferior division, the larger, divides into three branches. One passes beneath the optic nerve to the medial rectus. Another, to the inferior rectus. The third and longest runs forward between the inferior recti and lateralis to the inferior oblique.
inferior nasal concha; inferior oblique muscle; inferior olivary nucleus; inferior orbital fissure; inferior petrosal sinus; inferior pharyngeal constrictor muscle; inferior pubic ramus; inferior rectus muscle; inferior sagittal sinus; inferior salivatory nucleus; inferior temporal gyrus; inferior thyroid artery; inferior thyroid vein; Inferior ...
In the primary position (eyes straight ahead), both of these groups contribute to vertical movement. Elevation is due to the action of the superior rectus and inferior oblique muscles, while depression is due to the action of the inferior rectus and superior oblique muscles. When the eye is abducted, the recti muscles are the prime vertical movers.