Mylohyoid muscle
Updates to Article Attributes
Body
was changed:
The mylohyoid muscles form a paired muscular sling that forms part of the floor of the mouth. It also separates the sublingual space (and oral cavity) from the submandibular space.
Summary
-
origin: mylohyoid line/ridge on the
medialinternal surface of the mandible - insertion: anterior and middle fibres insert into a midline raphe that extends from the mandibular symphysis to the body of the hyoid bone, the posterior fibres extend directly to the body of the hyoid bone.
Arterial supply
- sublingual branch of the lingual artery
- mylohyoid branch of the inferior alveolar artery
- submental branch of the facial artery
Innervation
- mylohyoid nerve, a branch of the inferior alveolar nerve 2
Action
- elevates the floor of the mouth (e.g. in swallowing or protruding the tongue)
Variant anatomy
- mylohyoid boutonniere: defect in the midportion of the mylohyoid muscle through which sublingual glands, blood vessels, fat, etc. can herniate 1,4
-<strong>origin</strong>: mylohyoid line/ridge on the medial surface of the <a href="/articles/mandible">mandible</a>- +<strong>origin</strong>: mylohyoid line/ridge on the internal surface of the <a href="/articles/mandible">mandible</a>
-<strong>insertion</strong>: midline raphe that extends from the mandibular symphysis to the <a href="/articles/hyoid-bone">hyoid bone</a>-</li>- +<strong>insertion</strong>: anterior and middle fibres insert into a midline raphe that extends from the mandibular symphysis to the body of the <a href="/articles/hyoid-bone">hyoid bone</a>, the posterior fibres extend directly to the body of the hyoid bone. </li>
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