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Meckel's cartilage is a piece of cartilage from which the mandibles (lower jaws) of vertebrates evolved. Originally it was the lower of two cartilages which supported the first branchial arch in early fish. Then it grew longer and stronger, and acquired muscles capable of closing the developing jaw. [1]
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]
Premaxilla, maxilla, mandible (only as a model for mandible not actual formation of mandible), zygomatic bone, part of the temporal bone, [19] the incus, and the malleus of the middle ear, also Meckel's cartilage and the sphenomandibular ligament. Trigeminal nerve (part of V2 [20] and V3) Maxillary artery, external carotid artery, Vidian artery
The mandibular prominence, or mandibular process is an embryological structure which gives rise to the lower portion of the face. The mandible and lower lip derive from it. [1] The mesenchymal cells within the mandibular prominence condense to form Meckel's cartilage. [2] It is innervated by the mandibular nerve. [3]
It is a vestige of the embryonic lower jaw, Meckel cartilage. The ligament becomes accentuated and taut when the mandible is protruded. [4] Other ligaments, called "oto-mandibular ligaments", [5] [6] [7] connect the middle ear with the temporomandibular joint: discomallear (or disco-malleolar) ligament,
An autoimmune response to Type II collagen, which is found in cartilage and the sclera of the eye, may play a role in the pathophysiology of RP. [5] A genetic connection to HLA-DR4 (DRB1*04 subtype alleles) may also exist. [5] About 30% of cases of RP are linked to additional illnesses, such as autoimmune disorders. [5]
In this theory, mandibular condyle having cartilage at its end allows the downward and forward growth of the mandible. Maxilla, consisting of the nasal septum and nasomaxillary complex, which is made up of cartilage, moves forward and downward also by the forces from the nasal septum. Bones in both maxilla and mandible respond to their ...
Meckel's cartilage is a piece of cartilage from which the mandibles (lower jaws) of vertebrates evolved. Originally it was the lower of two cartilages which supported the first gill arch (nearest the front) in early fish. Then it grew longer and stronger, and acquired muscles capable of closing the developing jaw. [76]