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Extrinsic Eye Muscles
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Side A ------ Side B Explain the origin of the term extrensic eye muscles? Why is it entitled such? ------ They are termed extrensic because they originate within the orbit and insert onto the white outer surface of the eye (the sclera) What is the relation between the muscle name and its location? ------ Their name derives from the location of their insertion on the anterior part of the sclera. ie; medial, lateral, inferior, superior What is the function of the medial rectus? Where is it located? ------ The medial rectus attaches to the anterolateral surfaceof the eye and pulls it medially (ADDUCTION) When your right eye looks to the right, which extrinsic eye muscle is contracted? ------ The lateral recuts, attached to the anterolateral surface of the eye is contracted and pulls eye laterally. It is used to make your right eye look to the right (ABDUCTION) Name the location and function of the inferior rectus ------ The inferior rectus attaches to the anteroinferior part of the sclera and pulls the eye inferiorly and medially. i.e when you look down i.e when you look at your nose This muscle is pulls your eye superiorly and slightly medially ------ The superior rectus (just as the inferior rectus) does not pull directly parallel to the long axis resulting in its slight medial pull Label this diagram ------ 1. This muscle elevates the posterior part of the eye and turns the eye laterally ------ The superior oblique depresses the eye and turns it laterally. It passess through a pulley-like loop called the trochlea Name the location and function of the inferior oblique ------ The inferior oblique elevates eye. Located at inferior posterior part of eye. Contracting the muscle pulls the posterior part inferior
Side A ------ Side B Explain the origin of the term extrensic eye muscles? Why is it entitled such? ------ They are termed extrensic because they originate within the orbit and insert onto the white outer surface of the eye (the sclera) What is the relation between the muscle name and its location? ------ Their name derives from the location of their insertion on the anterior part of the sclera. ie; medial, lateral, inferior, superior What is the function of the medial rectus? Where is it located? ------ The medial rectus attaches to the anterolateral surfaceof the eye and pulls it medially (ADDUCTION) When your right eye looks to the right, which extrinsic eye muscle is contracted? ------ The lateral recuts, attached to the anterolateral surface of the eye is contracted and pulls eye laterally. It is used to make your right eye look to the right (ABDUCTION) Name the location and function of the inferior rectus ------ The inferior rectus attaches to the anteroinferior part of the sclera and pulls the eye inferiorly and medially. i.e when you look down i.e when you look at your nose This muscle is pulls your eye superiorly and slightly medially ------ The superior rectus (just as the inferior rectus) does not pull directly parallel to the long axis resulting in its slight medial pull Label this diagram ------ 1. This muscle elevates the posterior part of the eye and turns the eye laterally ------ The superior oblique depresses the eye and turns it laterally. It passess through a pulley-like loop called the trochlea Name the location and function of the inferior oblique ------ The inferior oblique elevates eye. Located at inferior posterior part of eye. Contracting the muscle pulls the posterior part inferior
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