Lateral rectus muscle of head definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. These two muscles allow the eyes to move from side to side. the lateral rectus muscle. To see content specific to your location, Its fibers are concentrated at the sides of the abdomen and, like the external oblique, has an aponeurosis covering the medial abdomen under the rectus abdominis. Purpose To assess the effect of lateral rectus muscle resection on abduction in Duane retraction syndrome (DRS) type 1. What are synonyms for Rectus lateralis muscle? MEDIAL RECTUS • It is largest of the ocular muscles and stronger than the lateral. The abducens nerve controls the lateral rectus muscle, which AB-ducts the eye. 2021 The magnitude of the lateral rectus deficit provides important diagnostic, prognostic, and therapeutic information. The optic nerve passes through this cone to reach the eye. The lateral rectus muscle is the thinnest extraocular muscle (9.2 mm wide). Look it up now! RESULTS: The lateral rectus–superior rectus band was visible in 95% of coronal T1WI, 68% of coronal STIR sequences, and 70% of coronal CT scans. View lateral rectus muscle videos. The content herein is provided for informational purposes and does not replace the need to apply As a result, the two muscles end up in a tug of war that causes the eye to retract partially into the eye socket as the medial rectus muscle overcomes the lateral rectus muscle to pull the eye inward. Are you feeling a little more confident on this topic now? Depending on tissue requirements, varying components of fascia lata (FL), vastus lateralis (VL) muscle, vastus intermedius (VI) muscle or rectus femoris (RF) muscles were included in the flap. Each of the eye’s recti muscles originates from the common tendinous ring (sometimes referred to as the annular tendon or annulus of Zinn), This is a fibrous ring of connective tissue that surrounds the optic nerve where it connects to the orbit. Strabismus, due to abnormalities in neuromuscular control weakness or injury to the inferior rectus muscle may be involved. A helpful mnemonic is MALE – medial rectus muscle to the apex, lateral rectus muscle to the empty space. Amazon Doesn't Want You to Know About This Plugin. Supplied by the inferior division of the oculomotor (3rd) nerve the inferior oblique chiefly acts to rotate the laterally (extorsion). Anatomical Variations . The lateral rectus muscle is one of the extrinsic muscles of the eye within each orbit. In the orbit of the eye, also called the eye socket, the lateral rectus muscle helps move the pupil away from the body’s midline. This is where the cranial nerve VI leaves on its way to the Lateral rectus muscle, which controls eye movement horizontally away from the midline of the body. Antonyms for Rectus lateralis muscle. This is part of a standard eye muscle surgery to treat exotropia Together with the other extraocular muscles, the lateral rectus muscle extends back from the side of the eye to meet up with the annulus of Zinn, a ring of tough tissue which surrounds the optic nerve. Based on the location of an abnormality, other neurologic structures may be involved with the pathology related to this nerve. The lateral rectus is a muscle of the eye’s orbit. An exotropia occurs due to the relatively unopposed force exerted on the eye by the lateral rectus muscle, which pulls the eye in an outward direction. independence. Lateral rectus muscle View Related Images. Their origin and insertion are as follows: Superior Oblique. Your sixth cranial nerve, also called the abducens nerve, controls the lateral rectus muscle that turns your eye outward, away from your nose. the lateral rectus muscle. Seen from above. The annulus of Zinn is a tendinous ring that surrounds the optic nerve and serves as the origin for five of the six extraocular It inserts into the lateral sclera of the eye anterior to the equator of the eye but posterior to the sclerocorneal junction. The extraocular muscles, as these muscles are known, are innervated by several different nerves which allow for a high degree of control in eye movements. Relations. Lateral rectus runs A Stevens tenotomy hook is used to sweep around the muscle to confirm the location of the muscle pole. 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. If weakness does develop, some screening tests can be used to learn more about the cause and to identify potential treatments which could address the issue. The extraocular muscles are located within the orbit, but are extrinsic and separate from the eyeball itself. Anyone requiring the most basic understanding of Ophthalmology should concentrate on topics (and test questions) highlighted with the ◆ symbol. The main function of this muscle is to pull the pupil away from the midline of the body. sr: superior rectus muscle; io: inferior oblique muscle. 5 Ever since she began contributing to the site several years ago, Mary has embraced the The lateral rectus muscle connects to the outside of your eye, right in line with the pupil. Apparent weakness in the lateral rectus can be caused by a number of different things. These extraocular muscles are responsible for coordinating the complex and quick movements of the eye. The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit. moves eye towards the nose (adduction) (towards the midline) book: moves eye medially. It will also prevent the medial rectus from contracting and shortening which can cause reduced outwards movement of the eye, even if the lateral rectus muscle starts to work normally again. Yoke muscles •These are pairs of muscles, one in each eye, which contract simultaneously during version movements. exciting challenge of being a researcher and writer. It has a wide origin to the medial side of and below the optic foramen from both parts of … Nonseptic lateral sinus thrombosis: the role of … The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit. Dissection of the LCFA-db was standard for fasciocutaneous perforator and VL myocutaneous flaps. The lateral rectus is a flat-shaped muscle, and it is wider in its anterior part. Methods A total of 54 unilateral DRS patients were divided into two groups according to high … The superior rectus is an eye muscle, controlling the eye as it moves up. This muscle is among four muscles - including the medial rectus, lateral rectus, and the inferior rectus - which control the eye's movement. Inferior rectus musclePassing underneath the eyeball the inferior rectus shares a connective tissue sheath with the inferior oblique muscle. spends her free time reading, cooking, and exploring the great outdoors. The abducent nerve innervates the lateral rectus muscle which abducts the eye (move away from the midline). The same problems can emerge when damage to the sixth cranial nerve has occurred. When the nerve to the inferior oblique pierces the inferior rectus muscle, its susceptibility to injury associated with stretching of the muscle during surgical procedures seems to be greater. Look it up now! It is one of six extraocular muscles that control the movements of the eye and the only muscle innervated by the abducens nerve, cranial nerve VI. 3 synonyms for lateral rectus muscle: abducens muscle, lateral rectus, rectus lateralis. The superior oblique is the only extraocular muscle supplied by the trochlear (4th) nerve and the primary action is nasal rotation (intorsion) of the eye. The most common cause of abdominal wall pain is nerve entrapment at the lateral border of the rectus muscle; this is known as anterior cutaneous nerve entrapment syndrome.4, 16 It … It is one of six extraocular muscles that control the movements of the eye and the only muscle innervated by the abducens nerve, cranial nerve VI. Located within the orbit, they surround the eyeball completely, facilitating its … The lateral rectus muscle is responsible for lateral movement of the eyeball, specifically abduction. Transposition of the superior rectus with or without transposition of the inferior rectus to the region adjacent to the lateral rectus muscle is one option used to restore abduction in patients with sixth nerve palsy. Extraocular muscles: Chiefly highlights the anatomical position of the six extraocular muscles in the left eye. Palsy of the abducens nerve will affect the lateral rectus and the eye will be addicted by medial rectus. The lateral rectus muscle is isolated with a Stevens tenotomy hook followed by a Jameson muscle hook. The lateral rectus muscle is the thinnest extraocular muscle (9.2 mm wide). Secondary actions depression and moving the eye laterally (abduction). Recti muscles Superior rectus muscle. Looking for lateral rectus muscle? Superior oblique muscleArising from the sphenoid bone, just above and medial to the optic canal, this long slender muscle travels between the medial wall and roof of the orbit. If the trochlear nerve is affected the patient will complain of diplopia [4] . It inserts into the lateral sclera of the eye anterior to the equator of the eye but posterior to the sclerocorneal junction. The lateral rectus muscle is one of the extrinsic muscles of the eye within each orbit. Muscles on both sides of the linea alba are shown. Lateral rectus is the only extraocular muscle that is innervated by the abducens nerve (C6). The lateral rectus muscle is a straight muscle which runs laterally along the outside of the eye. Learn about a little known plugin that tells you if you're getting the best price on Amazon. Copyright Conclusion: Elongation of the lateral rectus muscle by an autograft from the resected medial rectus muscle is an easy, effective procedure for large-angle sensory exotropia. It inserts into the lateral sclera of the eye anterior to the equator of the eye but posterior to the sclerocorneal junction. Identify the lettered muscle responsible for depressing the eye and turning it laterally. The muscle inserts into the … The lateral rectus originates at the lateral part of the annulus of Zinn, also known as the annular tendon or common tendinous ring, and inserts into the temporal side of the eyeball.The annulus of Zinn is a tendinous ring that surrounds the optic nerve and serves as the origin for five of the six extraocular muscles, excluding the inferior oblique muscle. Explanation of rectus muscle of eyeball, lateral Prism and cover test and the Krimsky test were used to detect deviations. It arises from the lateral part of the tendinous ring in the posterior part of the orbit. These very small muscles are quite strong, and capable of very precise and controlled movements which allow the eye to focus quickly on a visible target. Surgeon: Rudolph Wagner, MD, Rutgers – New Jersey Medical School, Newark, NJ, USA. The medial rectus eye muscle attaches to the side of the eye closest to the nose and moves the eye... Lateral rectus muscle. A. This particular extraocular muscle is innervated by the sixth cranial nerve, also known as the abducens nerve, and is the only muscle innverated by this nerve. Seen from above. Purpose To investigate the relationship between ocular motility and lateral rectus (LR) muscle volume according to the presence or absence of the abducens nerve in patients with Duane’s retraction syndrome (DRS) using high-resolution magnetic resonance imaging (MRI). The lateral rectus muscle is a muscle on the lateral side of the eyeball in the orbit. While CNVI innervates the retrobulbar muscle in animals such as rats and rabbits, nonhuman primates and humans do not have a retrobulbar muscle. Superior rectus muscleTravels superiorly over the globe and has connective tissue links with the levator muscle, which ensures that these muscles work synergistically. It is one of six extraocular muscles that control the movements of the eye.The lateral rectus muscle is responsible for lateral movement of the eyeball, specifically abduction. Inferior oblique muscleThe inferior oblique is the only extraocular muscle which originates from the anterior orbit, arising from the medial orbital floor. … In the case of the lateral rectus muscle, the muscle is a straight muscle which runs laterally along the outside of the eye. To ensure the site functions as intended, please Microsoft is encouraging users to upgrade to its more modern, FREE subscriptions for doctors and students... click here. It is one of six extraocular muscles that control the movements of the eye (abduction in this case) and the only muscle innervated by the abducens nerve, cranial nerve VI. Is Amazon actually giving you the best price? The lateral rectus is the only extraocular muscle supplied by the abducen (6th) nerve and is responsible for moving the eye laterally (abduction). For the globe to move in any given direction no single muscle acts alone, but groups of muscles act as agonists, antagonists or synergists in a highly co-ordinated fashion. Nerve damage to the sixth cranial nerve may be caused by a degenerative condition which involves the nervous system, for example, and someone can also develop a degenerative condition which attacks muscle tissue, weakening muscles like the lateral rectus. Additional images [] Nerves of the orbit. action of medial rectus muscle. The oblique muscles of the orbit are superior and inferior. Almost all lateral rectus palsies are acquired in later life and are caused by conditions that have damaged the VIth cranial nerve, which supplies the lateral rectus muscle. The complementary muscle to the lateral rectus is the medial rectus, which pulls the eye in towards the nose. The Extraocular Muscles. The abducens nerve provides motor innervation to only one extraocular muscle in humans, the ipsilateral lateral rectus muscle. Typical space from limbus is: Medial rectus, 5 millimeters Inferior rectus, 6 millimeters Lateral rectus, 7 millimeters Superior rectus, 8 millimeter. Ocular ductions, abnormal … 8 The patient reports horizontal diplopia that is worse at distance and worse when looking in the direction of the affected muscle. Oxbridge Solutions Ltd®. Medial rectus muscle The medial rectus is the largest of the extraocular muscles, probably due to its importance with allowing convergence for near vision. Eye and controls upward movement of the eyeball, lateral an eye muscle to. Is encouraging users to upgrade to its more modern, free subscriptions for and! Six extraocular muscles are located within the body are a group of six extrinsic muscles the. Horizontal diplopia that is worse at distance and worse when looking in the globe... Duplication of the globe the box to the outside of the eye innervates only the lateral side the. Rectus is a muscle in the picture ) arises from the annulus of.. 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