Anatomy Of Eye Muscles

It is continuous with the temporal bone and the pterygopalatine fossa caudally. The central artery supplies the retina while the central vein drains the retina.

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The lacrimal gland is a part of the lacrimal apparatus.

Anatomy of eye muscles. They work to control the movements of the eyeball including the superior eyelid. Innervation of the eye. The muscles of the eyes perform several specialized functions.

There are six muscles involved in the control of the eyeball itself. The Levator palpebræ superioris is described with the Anatomy of the Eye. Optic nerve CN II Muscles.

Muscles of eye-Muscles of eye- Extrinsic muscles muscles located outside of the eye that control certain eye movements such as moving the eyeball from side to side or rolling the eyes 10. Muscles responsible for the movement of the eye. The four recti muscles and the two oblique muscles.

Muscles Of The Head And Neck Anatomy Motion Support Its antagonist is the lateral rectus muscle that abducts the eye allowing it to look laterally or away from the bodys midline. In addition to the eyeball itself the orbit contains the muscles that move the eye blood vessels and nerves. Responsible for superior eyelid movement Recti and oblique muscles.

The eye is cushioned within the orbit by pads of fat. Four muscles that run almost a straight course from origin to insertion and hence are called recti Latin for straight and two muscles that run a diagonal course the oblique muscles. Embryology of Extraocular Muscles The fibers of the striated EOMs originate from condensations of cranial mesoderm whereas their associated connective tissues and the orbital smooth muscles SMs originate from the neural crest.

The extraocular muscles are placed in the orbit but are extrinsic and separate from the eyeball itself. In the diagram above - anatomy of the eye the artery is shown in red while the vein is shown in blue. Muscles of the eye.

Remnants of inner nervous layer of retina which has been removed 4-7. They can be divided into two groups. The extraocular muscles are the six muscles that control movement of the eye and one muscle that controls eyelid elevation levator palpebrae.

Superior rectus inferior rectus medial rectus lateral rectus superior oblique inferior oblique levator palpebrae superioris Intrinsic. 379 arises from the nasal part of the frontal bone from the frontal process of the maxilla in front of the lacrimal groove and from the anterior surface and borders of a short fibrous band the medial palpebral ligament. The eye is contained within the bony orbit of the head.

Intrinsic muscles muscles located inside the eye that help hold the lens in place modify its shape 11. Responsible for eye movement. They are summarised in the table below.

Dorsal ventral medial and lateral rectus muscles 8. There are four recti muscles. When the eye is adducted or turned toward the nose the superior oblique depresses the eye while the inferior oblique elevates the eye.

Six of these are responsible for the movement of the eye with the seventh being responsible for the movement of the superior eyelid. Eye anatomy bones of the orbit. Choroid covered by pigmented outer layer of retina 3.

There are seven extraocular muscles-Levator palpebrae superioris. Dorsal oblique muscle 9. The other four muscles mov.

There are six extraocular eye muscles and one muscle that controls movement in the upper eyelid. Muscles of Eye Movement. The six extraocular muscles EOMs form the effector arm of the ocular motor system which is a set of five distinct eye movement control systems saccades pursuits vergences and vestibulo-ocular and optokinetic reflexes.

These muscles characteristically originate from the common tendinous ring. Sphincter pupillae dilator pupillae ciliaris. There are six eye muscles that control eye movement.

The muscles responsible for the movement of the eye may be divided into the four recti muscles and the two oblique muscles. Superior rectus inferior rectus medial rectus and lateral rectus. The actions of the six muscles responsible for eye movement depend on the position of the eye at the time of muscle contraction.

The superior oblique muscle rotates the eye medially and abducts it when the eye if facing forward while the inferior oblique rotates the eye laterally and adducts it. Superior inferior medial and lateral. The orbit is formed by the cheekbone the forehead the temple and the side of the nose.

There are four recti. In total there are seven extraocular muscles. This group contains six muscles.

Oculomotor CN III trochlear CN IV and abducens CN VI nerves. Eye Muscles - American Academy of Ophthalmology. The bony orbit is a cavity comprising parts of the lacrimal bone includes fossa for nasolacrimal duct and the maxilla includes caudal foramen of infraorbital canal.

The two oblique muscles of the eye are responsible for the rotation of the eye and assist the rectus muscles in their movements. There are six eye muscles that control eye movement. One muscle moves the eye to the right and one muscle moves the eye to the left.

Extrinsic eye muscles also called extraocular muscles are attached to the outside of the eyeball and enable the eyes to move in all directions of sight. These muscles control to move the eye from side to side up down and rotate the eye. The Orbicularis oculi Orbicularis palpebrarum Fig.

The orbit is the bony eye socket of the skull.

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