In facial anatomy, the modiolus is a
chiasma of facial muscles held together by fibrous tissue, located lateral and slightly superior to each angle of the mouth. It is important in moving the
mouth
In animal anatomy, the mouth, also known as the oral cavity, or in Latin cavum oris, is the opening through which many animals take in food and issue vocal sounds. It is also the cavity lying at the upper end of the alimentary canal, bounded on ...
,
facial expression and in
dentistry
Dentistry, also known as dental medicine and oral medicine, is the branch of medicine focused on the teeth, gums, and mouth. It consists of the study, diagnosis, prevention, management, and treatment of diseases, disorders, and conditions o ...
. It is extremely important in relation to stability of lower denture, because of the strength and variability of movement of the area. It derives its motor nerve supply from the
facial nerve, and its blood supply from labial branches of the
facial artery
The facial artery (external maxillary artery in older texts) is a branch of the external carotid artery that supplies structures of the superficial face.
Structure
The facial artery arises in the carotid triangle from the external carotid arter ...
.
It is contributed to by the following muscles:
orbicularis oris,
buccinator,
levator anguli oris,
depressor anguli oris,
zygomaticus major,
risorius,
quadratus labii superioris,
quadratus labii inferioris
The depressor labii inferioris (or quadratus labii inferioris) is a facial muscle. It helps to lower the bottom lip.
Structure
The depressor labii inferioris muscle arises from the lateral surface of the mandible. This is below the mental for ...
.
[Drake, Vogl, Mitchell. Gray's Anatomy For Students 2nd edition (2010). Elsevier.]
References
2.Al-Hoqail RA, Abdel Meguid EM. An anatomical and analytical study of the modiolus: enlightening its relevance to plastic surgery. Aesthetic Plast Surg. 2009;33(2):147–152. doi:10.1007/s00266-008-9187-x
3.Pélissier P, Pistre V, Bustamante K, Martin D, Baudet J. Le modiolus. Anatomie comparée, rappels embryologique et physiologique, intérêt chirurgical
he modiolus. Comparative anatomy, embryological and physiological review, surgical importance Ann Chir Plast Esthet. 2000;45(1):41–47.
4.Yu SK, Lee MH, Kim HS, Park JT, Kim HJ, Kim HJ. Histomorphologic approach for the modiolus with reference to reconstructive and aesthetic surgery. J Craniofac Surg. 2013;24(4):1414–1417. doi:10.1097/SCS.0b013e318292c939
{{DEFAULTSORT:Modiolus (Face)
Muscular system
fr:Modiolus (genre)