Mylohyoid Muscle: Difference between revisions
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== Description == | == Description == | ||
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. <ref name="Gray">Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea e Febiger, 1918; Bartleby.com, 2000.</ref><br> [[Image:Mylohyoid muscle.PNG|center|500px]] | The '''Mylohyoideus''' (Mylohyoid muscle), flat and triangular, is situated immediately above the anterior belly of the [[Digastric_Muscle|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. <ref name="Gray">Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea e Febiger, 1918; Bartleby.com, 2000.</ref><br> [[Image:Mylohyoid muscle.PNG|center|500px]] | ||
==== Variations ==== | ==== Variations ==== | ||
It may be united to or replaced by the anterior belly of the Digastricus; accessory slips to other hyoid muscles are frequent. <ref name="Gray" /> | It may be united to or replaced by the anterior belly of the [[Digastric_Muscle|Digastricus]]; accessory slips to other hyoid muscles are frequent. <ref name="Gray" /> | ||
=== Origin === | === Origin === | ||
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=== Insertion<br> === | === Insertion<br> === | ||
Anterior three quarters : midline raphe. posterior quarter: superior border of body of hyoid bone<br> | Anterior three quarters: midline raphe. posterior quarter: superior border of body of hyoid bone<br> | ||
=== Nerve<br> === | === Nerve<br> === | ||
Mylohyoid nerve | Mylohyoid nerve<br>A motor branch of the '''inferior alveolar nerve''', a branch of the mandibular division of the '''trigeminal nerve (V)'''. | ||
=== Artery<br> === | === Artery<br> === | ||
Sublingual Artery | Sublingual Artery | ||
== Function<br> == | == Function<br> == | ||
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Elevates hyoid bone, supports and raises floor of mouth. Aids in mastication and swallowing<br> | Elevates hyoid bone, supports and raises floor of mouth. Aids in mastication and swallowing<br> | ||
== Clinical relevance == | == Clinical relevance == | ||
Conditions that can afflict the mylohyoid muscle include: | |||
*Overuse injuries, | |||
*Tears, | |||
*[[Muscle_Strain|Strains]], | |||
*Myopathy, | |||
*Atrophy, | |||
*Infectious myositis, | |||
*Neuromuscular diseases, | |||
*Lacerations | |||
*Contusions | |||
It may be responsable of commons syntomps: | |||
*[[Chronic_neck_pain|Neck Pain]] | |||
* | |||
===== Mylohyoid boutonniere ===== | |||
A normal focal discontinuity in the mylohyoid muscle, which may permit the sublingual salivary gland, fat or vessels - or a combination of each - to protrude out from the sublingual space into the submandibular space. <ref>Radiopedia. Mylohyoid Boutonierre. https://radiopaedia.org/articles/mylohyoid-boutonniere (Accessed 28 may 2017)</ref> | |||
== Assessment == | == Assessment == | ||
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== Treatment == | == Treatment == | ||
== Resources == | == Resources == |
Revision as of 11:58, 28 May 2017
Original Editor - Daniele Barilla
Top Contributors - Daniele Barilla, Kim Jackson, Evan Thomas and WikiSysop
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]
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 (V).
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]
Conditions that can afflict the mylohyoid muscle include:
- Overuse injuries,
- Tears,
- Strains,
- Myopathy,
- Atrophy,
- Infectious myositis,
- Neuromuscular diseases,
- Lacerations
- Contusions
It may be responsable of commons syntomps:
Mylohyoid boutonniere[edit | edit source]
A normal focal discontinuity in the mylohyoid muscle, which may permit the sublingual salivary gland, fat or vessels - or a combination of each - to protrude out from the sublingual space into the submandibular space. [2]
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]
References[edit | edit source]
- ↑ 1.0 1.1 Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea e Febiger, 1918; Bartleby.com, 2000.
- ↑ Radiopedia. Mylohyoid Boutonierre. https://radiopaedia.org/articles/mylohyoid-boutonniere (Accessed 28 may 2017)