Sphenomandibular ligament
| Sphenomandibular ligament | |
|---|---|
mandible. Medial aspect. (Spheno-mandibular lig. labeled vertically at center.) | |
| Details | |
| From | spine of sphenoid bone |
| To | mandibular foramen |
| Identifiers | |
| Latin | ligamentum sphenomandibulare |
| TA98 | A03.1.07.007 |
| TA2 | 1568 |
| FMA | 57077 |
| Anatomical terminology] | |
The sphenomandibular ligament (internal lateral ligament) is one of the three ligaments of the
The SML is derived from Meckel's cartilage.[citation needed]
Anatomy
The SML is a tough,[3]'flat,[1][3] thin band.[1] It broadens inferiorly,[1][3] measuring about 12 mm in width on average at the point of its inferior attachment.[1]
It is derived from the perichondrium of Meckel's cartilage.[3]
Attachments
Superiorly, the SML is attached to the
Inferiorly, it is attached at to lingula of mandible[1][3] and the inferior margin of the mandibular foramen.[3]
Anatomical relations
The
The
The medial pterygoid muscle is situated inferolaterally to the SML.[1]
The
The SML is pierced by the mylohyoid nerve (a branch of the inferior alveolvar nerve) and the accompanying mylohyoid artery and vein.[3]
Any remaining space between the SML and mandible is taken up by the parotid gland.[3] Between the SML and the pharynx are situated adipose tissue, and a pharyngeal vein.[1]
Function
The function of the sphenomandibular ligament is to limit distension of the mandible in an inferior direction. It is slack when the temporomandibular joint (TMJ) is in closed position; it is taut when the condyle of the mandible is situated anterior to the temporomandibular ligament.[2] The SML has about 5 mm of slack when the jaw is closed; it becomes taut when the jaw is open roughly half-way.[1]
References
- ^ OCLC 1201341621.)
{{cite book}}: CS1 maint: location missing publisher (link - ^ a b c Berkovitz, Holland, Moxham. Oral Anatomy, Histology and Embryology.
{{cite book}}: CS1 maint: multiple names: authors list (link) - ^ ISBN 978-0-7295-3752-0.
External links
- "Anatomy diagram: 25420.000-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2014-01-01.
- http://ect.downstate.edu/courseware/haonline/labs/l27/070105.htm
