The mylohyoid line is a bony ridge on the internal surface of the
mandible
In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. It forms the lower jaw and holds the lower teeth in place. The mandible sits beneath the maxilla. It is the only movable bone ...
. It runs posterosuperiorly. It is the site of origin of the
mylohyoid muscle
The mylohyoid muscle or diaphragma oris is a paired muscle of the neck. It runs from the mandible to the hyoid bone, forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth. It forms the flo ...
, the
superior pharyngeal constrictor muscle, and the
pterygomandibular raphe
The pterygomandibular raphe (pterygomandibular ligament) is a ligamentous band of the buccopharyngeal fascia. It is attached superiorly to the pterygoid hamulus of the medial pterygoid plate, and inferiorly to the posterior end of the mylohyoi ...
.
Structure
The mylohyoid line is a bony ridge on the internal surface of the body of the
mandible
In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. It forms the lower jaw and holds the lower teeth in place. The mandible sits beneath the maxilla. It is the only movable bone ...
. The mylohyoid line extends posterosuperiorly. The mylohyoid line continues as the mylohyoid groove on the internal surface of the ramus.
The
mylohyoid muscle
The mylohyoid muscle or diaphragma oris is a paired muscle of the neck. It runs from the mandible to the hyoid bone, forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth. It forms the flo ...
originates from the
anterior
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek language, Greek roots, describe something in its standard anatomical position. Th ...
(front) part of the mylohyoid line.
Rarely, the mylohyoid muscle may originate partially from other surfaces of the mandible.
The
posterior (back) part of this line, near the
alveolar margin, gives attachment to a small part of the
superior pharyngeal constrictor muscle, and to the
pterygomandibular raphe
The pterygomandibular raphe (pterygomandibular ligament) is a ligamentous band of the buccopharyngeal fascia. It is attached superiorly to the pterygoid hamulus of the medial pterygoid plate, and inferiorly to the posterior end of the mylohyoi ...
.
Function
The mylohyoid line is the site of attachment of many muscles, including the
mylohyoid muscle
The mylohyoid muscle or diaphragma oris is a paired muscle of the neck. It runs from the mandible to the hyoid bone, forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth. It forms the flo ...
,
and the
superior pharyngeal constrictor muscle. It is also the site of attachment of the
pterygomandibular raphe
The pterygomandibular raphe (pterygomandibular ligament) is a ligamentous band of the buccopharyngeal fascia. It is attached superiorly to the pterygoid hamulus of the medial pterygoid plate, and inferiorly to the posterior end of the mylohyoi ...
.
Additional images
File:Slide4oooo.JPG, Mylohyoid line
References
External links
* - "Anterior Triangle of the Neck: Bones"
*
{{Authority control
Bones of the head and neck