It depresses and retracts the tongue. If the light is shone is one eye and the pupil in that eye fails to constrict (an absence of the direct light reflex), this indicates an oculomotor nerve lesion to that eye. Best Answer Copy The intrinsic muscles of the eye are the dilator (radial), the sphincter pupillae (circular) constrictor muscle and the ciliary muscle. This creates an effective protection from swallowed material. iris is also a circular structure that makes up the colored part of the eye. The intrinsic eye muscles include the ciliary muscle, iris sphincter and radial pupil dilator muscles. It moves the eye upward. 2. Home. This muscle comprises part of the Dialator and constrictor pupillae The retina is also called _____ _____ and has _____ layers. The oculomotor nerve is the third cranial nerve (CN III), and one instance in which the name is a clear indication of the function of the nerve (Oculo = pertaining to the eye, motor = producing movement). Simply from the name then, it is easy to know that the oculomotor nerve will innervate muscles that move the eye itself or components of the eye. 0. QUESTION #1. Ophthalmoplegia or eye muscle weakness is a condition that is characterized by either paralysis or weakness of the eye muscles. Nucleus of oculomotor nerve Nucleus nervi oculomotorii 1/2 Synonyms: Nucleus of cranial nerve III, Nucleus nervi cranialis III Upon exiting the cavernous sinus, the oculomotor nerve branches run below the anterior clinoid process of the sphenoid bone to enter the To understand the important clinical significance of the oculomotor nerve, this article will first discuss the origin and pathway of the nerve, its function, the muscles that are innervated by the nerve along with the movement they produce, and blood supply to the nerve. pupillae with antagonist effects on the diameter of the pupil. oculomotor nucleus and innervate skeletal muscles associated with the eye. Genioglossus: arises from mandibular symphysis and inserts into the body of the hyoid/full length of tongue. The human eye has six eye muscles. Draw an arrow to the platysma muscle and label it "B". Why is there a force of attraction between water molecules? These muscles perform various functions and different movements to orient the tongue according to daily life habits. Which two extrinsic eye muscles would make the eyeball look up? These muscles originate from the bones of the orbit and insert into the surface of the eyeball. thyroepiglottic muscle: originates from the upper border of the lamina of the thyroid cartilage and inserts into the side of the epiglottis. These will carry proprioceptive information back from the eye regarding the location and movement of the eye. Today 's Points. What are the 3 intrinsic eye muscles? Four muscles that run almost a straight course from origin to insertion are called recti muscles and two muscles that a diagonal course are called oblique muscle. Why is Freak interested in King Arthur and the knights of the round table? All nerve fibers to the dilator pupillae degenerate after extirpation of the superior cervical ganglion. The extrinsic muscles, which comprise three pairs of voluntary muscles, are inserted on the sclera (outer surface) of the eyeball and control its movements. The two oblique muscles of the eye are responsible for the rotation of the eye and assist the rectus muscles in their movements. enters the eye in various illuminated environments. The intrinsic eye muscles are under massssssss central system? Ophthalmoplegia is the paralysis or weakness of the eye muscles. What are some intrinsic muscles? C) Extrinsic eye muscles move the eyeball in relation to the rest of the body, whereas intrinsic muscles This makes the oculomotor nerve susceptible to aneurysms that may press on the nerve, or aneurysm rupture, which will manifest as a sudden headache and symptoms of an oculomotor nerve lesion. To test accommodation, the practitioner typically has the patient follow the tip of their finger or a pen, as they move it from a distance to close to the patients face. Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. Everything You Need to Know, Treating Glaucoma: When To See Your Las Vegas Eye Doctor, Las Vegas Ophthalmologist & PRK: Photorefractive Keratectomy 101, Getting LASIK After Cataract Surgery: A Las Vegas Patient Guide, What Does an Ophthalmologist Treat? The intrinsic muscles of the eye are the dilator (radial), the sphincter pupillae (circular) constrictor muscle and the ciliary. Introduction Muscles of the eye gives support and mainly involves in the movement of the eye and provides better visual system. 3. [2][3][9][1] The thenar muscle, or thenar eminence, is a collection of three muscles at the fleshy base of the thumb (first digit) on the palmar aspect that acts to exert movement about the thumb. Is the oculomotor nerve sympathetic or parasympathetic? Insertion. Anterior to the ciliary body and muscle is the iris. Oculomotor Nerve. orbit through the superior orbital fissure. Why is Freak interested in King Arthur and the knights of the round table? The extraocular muscles are located within the orbit, but are extrinsic and separate from the eyeball itself. Draw an arrow to the obicularis oris muscle and They act to control the movements of the eyeball and the superior eyelid.. These muscles are called extrinsic eye . A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? There are also two minor muscles, namely the Some intrinsic muscles of the tongue increase the length of the tongue. down movement) and the lateral and medial rectus (control outer and Both the somatic and visceral motor axons exit the How many genes are there for eye color? Recti muscles There are four recti; superior, inferior, medial, and lateral. and grab your free ultimate anatomy study guide! (c) Copyright Oxford University Press, 2021. Deltoid The Flexor pollicis brevis muscle originates from the Flexor retinaculum, trapezoid, and capitate bones. The oculomotor nerve is no exception. The six intrinsic muscles (brown shaded) are the helicis major (HMJM) and helicis minor (HMNM) muscles, tragicus muscle (TR), anti-tragicus muscle (ATR), transverse auricular muscle (TAM), and oblique muscle (OAM). Nervous tunic, 4 The middle and distal portions of the nerve are typically supplied by a branch of the internal carotid artery as it passes through the cavernous sinus, the meningohypophyseal trunk. The superior rectus is an extraocular muscle that attaches to the anterior superior surface eye. All rights reserved. From here the superior and inferior branches will pass anteriorly to supply extrinsic, or extra-ocular, muscles of the eye. Urocortin 2 (UCN2) is a peptide related to corticotropin-releasing factor, capable of activating CRF-R2. These muscles act to close the inlet of the larynx by drawing the epiglottis down so that its lower half makes contact with the arytenoids. 2022 The visceral motor axons of the oculomotor nerve are part of the Copyright most adults over 40 require reading glasses (magnifiers). Among its multisystemic effects, it has actions in all 3 muscle subtypes. Name the two intrinsic muscles of the human eye? B. Hold both your thumbs at arm's length, directly in front of your eyes. 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. B) The extrinsic muscles cause faster movements than do the intrinsic muscles. The cell bodies of the oculomotor nerve are located within two nuclei positioned close to one another, posteromedially in the midbrain, the most superior component of the brainstem. Kenhub. Six intraocular tissues are named as: Superior Recti Inferior Recti Medial Recti Lateral Recti Superior Oblique Inferior Oblique covington multicare appointment. The ciliary muscle is a smooth muscle that, when contracted Smooth What intrinsic eye muscles are innervated by the parasympathetic nervous system? The muscles are as follows: Superior Oblique - Located around the back of the superior rectus muscle, responsible for lowering, abducting, and medially rotating the eye Inferior Oblique - Located around the back of the inferior rectus muscle, responsible for raising, abducting, and laterally rotating the eyeball Additional Eye Muscles Read more. These muscles are located within the eye itself and are both supplied by Sympathetic Nervous System. Understand if the tongue is a muscle or an organ. Dimitrios Mytilinaios MD, PhD There are seven extrinsic eye muscles (muscles that lay outside of the eye itself) that move the superior eyelid and the eyeball. The cell bodies and their somatic motor nerve fibers, or axons, that will innervate skeletal muscles associated with the eye, arise from the oculomotor nucleus. Kim Bengochea, Regis University, Denver. What is the diction of the poem abiku by jp clark? Answer of 1. Eye Reflexes: Both intrinsic (internal) and extrinsic (external) muscles are necessary for proper eye function. Explain their functions. Intrinsic muscles of the tongue affect the size and shape of the tongue. The motor nerves will interact with the target muscles via the neuromuscular junction. It can affect one or more of the six muscles that hold the eye in place and control its movement. It surrounds a central opening or aperture known as the pupil. in five What eye color is dominant? Life Sciences, View all related items in Oxford Reference , Search for: 'eye muscle' in Oxford Reference . Begins in the oculomotor and Edinger-Westphal nuclei in the, Oculomotor nerve palsy, Weber and Mortiz Benedikt syndromes, diabetes mellitus, posterior cerebral and communicating artery aneurysms, H pattern, ptosis, accommodation, and pupillary light reflex, Superior part of the common tendinous ring, Sclera on the top of the eyeball, posterior to the corneoscleral junction, Inferior part of the common tendinous ring, Sclera on the bottom of the eyeball, posterior to the corneoscleral junction, Sclera on the medial aspect of the eyeball, posterior to the corneoscleral junction, Anterior aspect of the floor of the orbit, Sclera of the eyeball, deep to the insertion of the lateral rectus on the lateral aspect of the eyeball, Abduction, elevation, lateral rotation of the eyeball, Anterior and superior to the optic canal on the lesser wing of the sphenoid bone, Superior tarsus and skin of the upper eyelid, Deviation of the ipsilateral eye downward and outward (due to action of the intact, A drooping of the ipsilateral eyelid (ptosis) due to a lack of levator palpabrae superioris action, Ipsilateral loss of accommodation and light reflexes due to lack of sphincter pupillae and ciliary muscles, Dilation of ipsilateral pupil (unopposed due to lack of sphincter pupillae action), Deviation of the ipsilateral eye out downward and outward, Unresponsive light and accommodation reflexes in the ipsilateral eye, Oculomotor, abducens, and trochlear nerves (lateral-left view) - Paul Kim. These muscles work to move the eye up and down, side to side, and to rotate the eye. The first four mentioned here will move the eyeball; the last one will move the upper eyelid. If the practitioner shines a light in one eye and both pupils constrict, this indicates that both the optic and oculomotor nerves are intact. This study's aim was to determine its potential role in two of the intrinsic eye muscle kinetics. I would honestly say that Kenhub cut my study time in half. rifle paper co phone case iphone 12 pro max; defeat soundly and humiliatingly 7 letters; can you share office 365 business subscription It moves the eye upward. it is the only muscle with melanin, which gives it color. The iris contains the dilator pupillae and the constrictor Last reviewed: October 25, 2022 smooth, sphinctor What are the two fibers of the iris? parasympathetic fibers that travel with cranial nerve 3. Ciliary muscle, dilator and constrictor pupillae Are the intrinsic eyes muscles smooth or skeletal muscles? The intrinsic muscles, which are involuntary, are situated inside the eyeball and comprise the ciliary muscle (see ciliary body) and the iris. Five of them are innervated by the oculomotor nerve and will be discussed in detail below. The intrinsic muscles of the eye are the dilator (radial), the Terminal branches of the axons seem to enter the cytoplasm of the . The muscular portion of the ciliary body is continuous with the ciliary processes, which are projections of the ciliary body that are in turn attached to the lens of the eye via fibers known as zonular fibers. muscle is part of the accommodation reflex and under the control of Trochlear Nerve. The extrinsic muscles include the trapezius, latissimus dorsi, rhomboid major and minor, levator scapulae and the serratus posterior superior and inferior There are six muscles that are present in the orbit (eye socket) that attach to the eye to move it. Reading time: 20 minutes. Often the proper functioning of these muscles is tested by getting the patient to follow an object, such as a pen, with their eyes in an H pattern. The cell bodies and their visceral motor nerve fibers, or axons, that innervate muscles within the eye itself, arise from the Edinger-Westphal nucleus. Even the middle ear takes part in the muscular system of the head and neck. It can lead to a lack of eye mobility and even permanent. Unfortunately, a lack of medial rotation could be due to damage to the somatic motor input to the medial rectus, and a lack of pupil constriction in both eyes might indicate damage to the optic nerve (CNII) rather than the oculomotor nerve. Sit comfortably, keep your shoulders relaxed, and neck straight, and look ahead. Define. The extrinsic muscles, which comprise three pairs of voluntary muscles, are inserted on the sclera (outer surface) of the eyeball and control its movements. The tongue is a combination of extrinsic and intrinsic muscles. This is normally accomplished by shining a bright light into one eye and watching for pupil constriction in the eye being stimulated with light, and also the contralateral eye. Once inside the orbit, the inferior branch of the oculomotor nerve will send a preganglionic branch to the The larynx (voice box) is an organ located in the anterior neck. The muscles that act on and around the eyes receive innervation from four cranial nerves and the sympathetic nervous system. The blood supply to the oculomotor nerve can be more easily understood if the nerve is broken down into intracranial and extracranial (i.e. The ciliary body includes the ciliary muscle and the ciliary processes, both of which form a complete ring around the eye. What is the theme of miss phathupats the story. In fact, the smallest muscle of the skeleton is the stapedius, which measures around 1 millimeter (1/20th of an inch) in length. These muscles characteristically originate from . Muscles of Eye Movement. parasympathetic fibers of the oculomotor nerve. What are the intrinsic and extrinsic muscles of eye? Oculomotor nerve: want to learn more about it? Innervation is from CNXII. Strips of iris sphincter (rabbit) and ciliary (bovine . Intrinsic ocular muscles which are within the eyeball itself and control how the eyes accommodate Six extraocular muscles move the eye: superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique and inferior oblique muscles; and one other, levator palpebrae superioris, opens the eyelid. These muscles are sometimes referred to as intrinsic eye muscles. Pupillary diameter, or more precisely iris size, is controlled by two muscles, the sphincter pupillae, which is primarily under the control of the parasympathetic nervous system, and the dilator pupillae, which is primarily under the control of the sympathetic nervous system. A Dictionary of Biology , Subjects: There are six muscles which are responsible for controlling the movement of the eyeballs. There are four recti muscles; superior rectus, inferior rectus, medial rectus and lateral rectus. Accomodation simply refers to different strategies employed so that when viewing objects in front of us at different distances, our view of them can remain clear and focused. Within the brainstem, organization of the oculomotor and Edinger-Westphal nuclei in the midbrain can mean quite specific localization of damage. It continues anteriorly to pierce the dura covering the cavernous sinus, passing through the superolateral aspect of the wall of the cavernous sinus, lateral to the internal carotid artery as it passes into the cranial cavity. anterior surface of the brainstem as the oculomotor nerve, appearing from between the midbrain and pons, passing between the posterior cerebral and superior cerebellar arteries. The intrinsic muscles (also known as the scapulohumeral group) originate from the scapula and/or clavicle, and attach to the humerus. The intrinsic muscles, controlled by the autonomic nervous system, are the ciliary body (which changes the shape of the lens) and the iris (which controls the pupil size and regulates the amount of light rays entering the eye). What does it cost to install 10 power points in a brick wall? What is the unit rate of 200 meters in 19.30 seconds? The iris contains the dilator. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use (for details see Privacy Policy and Legal Notice). Game Points. What are the six intrinsic eye muscles? purely motor nerve in its function. Any of the muscles associated with the functioning of the eye, which are divided into two groups. From here, the nerve runs anteriorly in the subarachnoid space, medial to the much larger trigeminal nerve (CNV) and its ganglion. If the light is shone in one eye and neither pupil constricts, an absence of both the direct and consensual light reflexes, this indicates a lesion to the optic nerve in that eye. What are the dimensions of a frozen 25 lb turkey? The The Flexor pollicis brevis muscle is inserted on the Base of the proximal phalanx of the thumb. The human eyeball is held in its place with the help of six muscles. 2. B. Deficits in the muscles or the nerves innervating these muscles can . relaxes the suspensory ligament of the lens. Why is there a force of attraction between water molecules? Today's Rank--0. Draw an arrow to the trapezius muscle and label it "A". Muscles - 2. It is a component of the respiratory tract, and has several important functions, including phonation, the cough reflex, and protection of the lower respiratory tract. Uncategorized. These are the thenar, hypothenar, interossei and the lumbrical muscles. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. Match the following terms with the The preganglionic branch carries parasympathetic nerve fibers that will synapse with parasympathetic postganglionic fibers within the ganglion. These muscles are located outside of the eye itself. What is the theme of miss phathupats the story. You could not be signed in, please check and try again. What is the unit rate of 200 meters in 19.30 seconds? Total Points. It is difficult to determine whether there has been damage to the input to the ciliary muscle that changes the shape of the lens with this type of testing. The four The superior rectus is an extraocular muscle that attaches to the anterior, superior surface eye. Your current browser may not support copying via this button. inner movement). Sign in to an additional subscriber account. Intrinsic Eye Muscles by admin | May 6, 2022 | Group The intrinsic muscles of the eye control two important functions: the size of the pupil: iris muscles (Iris Sphincter Muscle and Iris Dilator Muscle) the shape of the lens: Ciliary Muscle Size of the pupil Symptoms include: Recall that as the oculomotor nerve fibers exit the brainstem they pass between the posterior cerebral and superior cerebellar arteries. You need to get 100% to score the 6 points available. Recessive? Eye movement disorders can be mild or severe. Five of them are innervated by the oculomotor nerve and will be discussed in detail below. What is the diction of the poem abiku by jp clark? However, also testing the pupillary light reflex will give a more complete picture of oculomotor nerve involvement. There is a printable worksheet available for download here so you can take the quiz with pen and paper. The muscles of the eye are integral to its function and motion. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? Information that is coming into the brain from the eyes travels via the optic nerve (CNII). Your email address will not be published. There are six muscles involved in the control of the eyeball itself. Facial Nerve. More anterior lesions within the oculomotor nucleus would tend to damage motor supply to the ipsilateral inferior rectus, and the sphincter pupillae and ciliary muscles (Edinger-Westphal nucleus). Contraction of this A NeONBRAND Site. - Muscles of ciliary body can change thickness of lens. Painless dysfunction of the somatic motor functions of the nerve however, would be indicative of vascular ischemic disease, perhaps as a complication of diabetes. The parasympathetic visceral motor fibers associated with the pupillary light reflex, tend to run superifically within the nerve. Science and technology The nerve supply of the Flexor pollicis brevis muscle is the Median nerve. Muscles - 2. The terminal nervous structure in these muscles is not independent of the axons but undergoes degeneration with the latter following extirpation of their cells of origin. Motor information on the other hand, will originate in, and then travel from parts of the brain out to target muscles (efferent information). NOTE: The common tendinous ring is a fibrous ring of tissue that surrounds the optic canal in the posterior aspect of the orbit and provides a point of origin for all four recti muscles of the eye (superior, inferior, medial and lateral recti). These nerve axons will arise from the Finally, the iris or colored part of the eye is a muscle which Eye muscle surgery If one of the extraocular muscles is too strong, too weak, or otherwise dysfunctional, an eye movement disorder can develop. From: eye muscle in A Dictionary of Biology This information is sent to both the right and left Edinger-Westphal (EW) nuclei, regardless of which eye is being tested. Your Skills & Rank. KEY. Shift your focus to the space between the two thumbs, preferably at a distant object, for another 5 seconds. The intrinsic muscles, which are involuntary, are situated inside the eyeball and comprise the ciliary muscle (see ciliary body) and the iris. They include the countless short-fibered, or smooth, muscles of the internal organs and power the digestive tract, the pupils of the eyes, and all other involuntary mechanisms. As mentioned previously, the oculomotor nerve is typically thought to be a This is how the nerve will be discussed in this article, but note that there will be a small number of sensory fibers in the nerve also. ciliary ganglion (ganglion = a collection of nerve cell bodies) which is located just behind the eyeball. Is Cataract Surgery Permanent? major muscles are the superior and inferior rectus (control up and The initial portion of the nerve is supplied by branches of It is the movement producing functions of the nerve that make it a useful indicator of brain injury. inferior oblique (controls motion up and out or "extorsion") and What has Prince Charles done to help the world? The cavernous sinus, a plexus of veins, is located on either side of the sella turcica, which is a shallow depression on the superior aspect of the body of the sphenoid bone that houses the pituitary gland. The intrinsic muscles, which are involuntary, are situated inside the eyeball and comprise the ciliary muscle (see ciliary body) and the iris. Voluntary Muscles: levator Palpebrae Superior Four Recti Muscles: Superior rectus Inferior rectus Medial rectus Lateral rectus Two Obliques Muscles: Superior oblique Inferior oblique The transverse muscle of tongue (transversus linguae) is an intrinsic muscle of the tongue. 6. This is because the blood supply to the oculomotor nerve runs deep in the nerve, and interruptions to that blood supply will spare the more superficially located fibers related to the pupillary light reflex. What is -40 degrees Celsius to Fahrenheit? They can be divided into two groups; the four recti muscles, and the two oblique muscles. As such they dont conform to the typical organization of other muscles with well defined origins and insertions. From Brimhall Eye of Las Vegas. Intrinsic muscles of eye are innervated by branches of Autonomic nervous system and the muscles are controlled by reflex action. Who is the one who informs Philip Hamilton where to find George Eacker, the man who publicly insulted his father Why is it significant that this character is the one to have this conversation with Philip Hamilton? ciliary body, which lies between the anterior border of the choroid and the iris. There are seven in total but the oculomotor nerve supplies five of them. These muscles work to move the eye up and down, side to side, and to . One of us! PRINTED FROM OXFORD REFERENCE (www.oxfordreference.com). In the anterior portion of the cavernous sinus, the oculomotor nerve divides into its superior and inferior branches. Carolyn Perry MSc, PhD The extrinsic muscles, which comprise three pairs of voluntary muscles, are inserted on the sclera (outer surface) of the eyeball and control its . 3. Hyoglossus: arises from the hyoid and inserts into side of tongue. Located inside the eye, the intrinsic eye muscles work tirelessly to dilate the pupils and focus the lens of the eye to produce clear vision. For oculomotor nerve functioning, the practitioner needs to pay special attention to adduction, elevation, and depression of the eye to see if these movements occur. ophthalmic artery. extrinsic muscles of tongue. Structure Location Olfactory epithelium Taste buds 4. The intrinsic muscles, which are involuntary, are situated inside the eyeball and comprise the ciliary muscle (see ciliary body) and the iris. the posterior cerebral artery, the thalamoperforating arteries. The following two diagram shows the extrinsic muscles of the eye and their function : In additional to muscle which control movement, the lens of the The symptoms of oculomotor nerve-related injury can differ based on the location of damage within the oculomotor and Edinger-Westphal nuclei in the midbrain, and whether it occurs inside or outside of the brainstem. They are split into two primary groups: the recti muscles and the oblique muscles. These will constrict the pupil and cause accommodation of the lens of the eye respectively. Updated: 09/28/2021 adobe indesign panels; villa khadijah batang kali; wastequip manufacturing locations; ductile definition chemistry; install unknown apps permission samsung Name the two intrinsic muscles of the human eye? QUESTION #3. The inferior rectus is an extraocular muscle that attaches to the anterior inferior surface eye. It moves the eye downward. Finally, the clinical manifestations of damage to the oculomotor nerve and possible brain injury implications will be discussed along with procedures that can be performed to test the proper functioning of all components of the oculomotor nerve. There are many muscles in the eye that control it. The muscles of the larynx can be divided into two groups; the external muscles and the internal muscles. They are the: * Bolded actions will be the only ones to occur when the line of sight is the same direction as the line of action of the muscle. What city is located at 17 degrees N and 88 degrees W? The information we provide is grounded on academic literature and peer-reviewed research. Interestingly, the distribution of visceral and somatic motor fibers, within the oculomotor nerve outside of the brainstem, can also be important clinically. Sensory information will be traveling towards the spinal cord and parts of the brain (afferent information) for processing and identification and thus will typically originate outside of the brain. What movements are the extrinsic eye muscles responsible for? eye muscle All By: . In this case the information has reached both EW nuclei because the optic nerve is intact, but the oculomotor nerve, to the tested eye, is lesioned, preventing pupil constriction. Abducens Nerve. muscle. This account has no valid subscription for this site. QUESTION #2. It has two types: intraocular and extra ocular muscles 2/13/2016 2Muscles of the eye Gives astonished look Closing of the eye. The eye is moved by six extraocular muscles, also known as extrinsic eye muscles. There are seven extraocular muscles - the levator palpebrae superioris, superior rectus, inferior rectus, medial rectus, lateral rectus, inferior oblique and superior oblique. This is an online quiz called Intrinsic Eye Muscles. Testing of two functions needs to occur here: accommodation and the pupillary light reflex. There are seven extraocular muscles- Levator palpebrae superioris: Responsible for superior eyelid movement, Recti and oblique muscles: Responsible for eye movement. When the eye is adducted, or turned toward the . Lesions occurring more posteriorly and laterally would affect the nerve supply to the ipsilateral medial rectus and inferior oblique muscles, whereas as more medially located lesions might affect the supply to the contralateral superior rectus muscle.
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