{"id":147687,"date":"2022-03-20T05:00:38","date_gmt":"2022-03-19T23:30:38","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/masseter-muscle-anatomy-structure-innervation-and-function\/"},"modified":"2022-11-06T18:45:41","modified_gmt":"2022-11-06T13:15:41","slug":"masseter-muscle-anatomy-structure-innervation-and-function","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/","title":{"rendered":"Masseter Muscle &#8211; Anatomy, Structure, Innervation and Function"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/#Masseter_Muscle_Anatomy\" title=\"Masseter Muscle Anatomy\">Masseter Muscle Anatomy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/#The_Masseter_Muscle_Structure\" title=\"The Masseter Muscle Structure\">The Masseter Muscle Structure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/#Innervation_of_the_Masseter_Muscle\" title=\"Innervation of the Masseter Muscle\">Innervation of the Masseter Muscle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/#Function_of_the_Masseter_Muscle\" title=\"Function of the Masseter Muscle\">Function of the Masseter Muscle<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/#Examination_of_the_Masseter_Muscle\" title=\"Examination of the Masseter Muscle\">Examination of the Masseter Muscle<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Masseter_Muscle_Anatomy\"><\/span>Masseter Muscle Anatomy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Masseter Muscle &#8211; Anatomy: The <a href=\"https:\/\/infinitylearn.com\/surge\/biology\/masseter-muscle\/\">masseter muscle<\/a> is a thick, quadrilateral muscle in the human head. It is the muscle of mastication, or chewing. The masseter muscle is the largest and most superficial muscle of the cheek. It is innervated by the mandibular branch of the trigeminal nerve, the fifth cranial nerve.<\/p>\n<p>The masseter muscle arises from the zygomatic arch, and inserts into the mandible, specifically the ramus and the coronoid process. The muscle has two bellies, or heads, and a tendon that connects the two bellies. The muscle fibers of the two bellies run in different directions. The lateral or superficial belly is larger, and the fibers run vertically. The medial or deep belly is smaller, and the fibers run horizontally.<\/p>\n<p>The masseter muscle is responsible for the majority of the force that is used to chew food. It elevates the mandible, and helps to close the mouth. The muscle also assists in the movement of the jaw from side to side.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-147686 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/masseter-muscle-anatomy-structure-innervation-and-function.jpg\" alt=\"Masseter Muscle - Anatomy, Structure, Innervation and Function\" width=\"606\" height=\"428\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/masseter-muscle-anatomy-structure-innervation-and-function.jpg?v=1647732634 606w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/masseter-muscle-anatomy-structure-innervation-and-function-300x212.jpg?v=1647732634 300w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Masseter_Muscle_Structure\"><\/span>The Masseter Muscle Structure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Masseter Muscle is a muscle of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Chewing\">mastication<\/a>. It is the muscle on the side of the face that moves the mandible (jawbone) up and down. The muscle is bilateral, meaning it is present on both the left and right sides of the face. The Masseter Muscle is the most superficial muscle of the face. It is located in the superficial fascia of the face, and is covered by the superficial temporal fascia and the skin. The muscle is triangular in shape, and has three origins: the zygomatic bone, the medial pterygoid muscle, and the lateral pterygoid muscle.It has two insertions: the mandible and the temporal bone. The muscle innervated by the mandibular division of the trigeminal nerve (CN V3).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Innervation_of_the_Masseter_Muscle\"><\/span>Innervation of the Masseter Muscle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The masseter muscle innervated by the facial nerve (CN VII). The facial nerve provides motor control to the muscles of facial expression, including the masseter muscle. The facial nerve also provides sensation to the face, including the skin over the masseter muscle.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Function_of_the_Masseter_Muscle\"><\/span>Function of the Masseter Muscle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The masseter muscle is a large muscle in the face that helps to chew food. It is located on the side of the face below the eye and above the jaw. Therefore muscle is responsible for elevating the jaw and clenching the teeth. The masseter muscle is a muscle in the jaw that helps to close the mouth. It is the largest muscle in the jaw and is responsible for most of the chewing action. The masseter muscle innervated by the mandibular nerve, which is a branch of the trigeminal nerve.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Examination_of_the_Masseter_Muscle\"><\/span>Examination of the Masseter Muscle<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>The masseter muscle is a muscle of mastication. It is a thick, quadrilateral muscle that is superficial to the TMJ. It arises from the zygomatic arch and inserts into the mandible.<\/li>\n<li>Therefore muscle innervated by the masseteric nerve, a branch of the mandibular nerve. The masseteric nerve enters the muscle at its medial border.<\/li>\n<li>The masseter muscle is responsible for elevating the mandible and clenching the teeth.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Masseter Muscle Anatomy Masseter Muscle &#8211; Anatomy: The masseter muscle is a thick, quadrilateral muscle in the human head. It [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Masseter Muscle - Anatomy","_yoast_wpseo_title":"%%title%% %%page%%","_yoast_wpseo_metadesc":"Learn about masseter muscle topic of Biology in details explained by subject experts on infinitylearn.com. 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