Mylohyoid Muscle

Original Editor - Daniele Barilla

Top Contributors - Daniele Barilla, Kim Jackson, Evan Thomas and WikiSysop

Musculi colli mylohyoideus.svg.png

Description[edit | edit source]

The Mylohyoideus (Mylohyoid muscle), flat and triangular, is situated immediately above the anterior belly of the Digastricus, and forms, with its fellow of the opposite side, a muscular floor for the cavity of the mouth. It arises from the whole length of the mylohyoid line of the mandible, extending from the symphysis in front to the last molar tooth behind. The posterior fibers pass medialward and slightly downward, to be inserted into the body of the hyoid bone. The middle and anterior fibers are inserted into a median fibrous raphe extending from the symphysis menti to the hyoid bone, where they join at an angle with the fibers of the opposite muscle. This median raphe is sometimes wanting; the fibers of the two muscles are then continuous. [1]

Mylohyoid muscle.PNG

Variations[edit | edit source]

It may be united to or replaced by the anterior belly of the Digastricus; accessory slips to other hyoid muscles are frequent. [1]

Origin[edit | edit source]

Mylohyoid line on internal aspect of mandible

Insertion
[edit | edit source]

Anterior three quarters : midline raphe. posterior quarter: superior border of body of hyoid bone

Nerve
[edit | edit source]

Mylohyoid nerve.
A motor branch of the inferior alveolar nerve, a branch of the mandibular division of the trigeminal nerve.

Artery
[edit | edit source]

Sublingual Artery

Function
[edit | edit source]

Elevates hyoid bone, supports and raises floor of mouth. Aids in mastication and swallowing

Clinical relevance[edit | edit source]

Assessment[edit | edit source]



Treatment[edit | edit source]

Resources[edit | edit source]


See also[edit | edit source]

Recent Related Research (from Pubmed)[edit | edit source]

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References[edit | edit source]

  1. 1.0 1.1 Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea e Febiger, 1918; Bartleby.com, 2000.