Meckel's Cartilage


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Related to Meckel's Cartilage: Meckel's diverticulum, Reichert's cartilage

Meckel's cartilage

[′mek·əlz ‚kärt·lij]
(embryology)
The cartilaginous axis of the mandibular arch in the embryo and fetus.

Meckel’s Cartilage

 

the primary mandible in gnathostomes and man, named for J. Meckel.

In all fish (except the cartilaginous group) and terrestrial vertebrates, Meckel’s cartilage is clad in integumentary bones and may itself be partly or completely ossified. The ossified posterior section of Meckel’s cartilage, the articular bone, joins the quadrate bone at the mandibular joint. In mammals, the articular and quadrate bones become the auditory ossicles (the malleolus and the incus); the remaining part of Meckel’s cartilage is reduced (preserved only in the embryo).

References in periodicals archive ?
Both muscles originate from the ascending process of the palatoquadrate, ventral to the posterior margin of the eye, and insert on Meckel's cartilage of the lower jaw.
Developed in the dermis and capable of bearing rooted teeth, dermal bone was laid down over the entire original chondrocranium on the undersurface of the palatoquadrate and the anterior portion of Meckel's cartilage. These are the bones that form the dermatocranium.
RAI 2 Partial deletions and distortions of midbrain/ hindbrain border region (MB/HB); eyes slightly closer together; axis slightly truncated; heart smaller with pericardial edema, otocysts slightly closer to MB/HB; tail slightly curled; deletions of the quadrate, pterygoid, and hyosymplectic cartilage; malformations of Meckel's cartilage, ceratohyals and the basihyal.
(5,7) He put forth the notion that not every middle ear conforms to the territorial confines of Reichert's and Meckel's cartilage. In fact, a case such as the one we describe here could be explained only by the derivation of each ossicle from separate populations or islands of mesenchymal cells.
Coracomandibularis (CM): this is a paired muscle, originating on the deep hypobranchial rafe, runs in cephalic direction, and inserts on the ventral surface of Meckel's cartilage. Fibers of this muscle are long, with parallel arrangement.
MORPHOLOGICAL AND MORPHOMETRIC ALTERATIONS INDUCED BY VALPROIC ACID ON RAT FETUSES' MECKEL'S CARTILAGE, LINGUAL MUSCULATURE, AND SUBMANDIBULAR GLAND