Articular bone

Source: Wikipedia, the free encyclopedia.
This article is about the articular bone. For articular surface or articularation, see joint.
dentary
bone.

The articular bone is part of the lower jaw of most

reptiles, as well as ancestral mammals
.

Anatomy

In most vertebrates, the articular bone is connected to two other lower jaw bones, the

suprangular and the angular.[1] Developmentally, it originates from the embryonic mandibular cartilage. The most caudal portion of the mandibular cartilage ossifies to form the articular bone, while the remainder of the mandibular cartilage either remains cartilaginous or disappears.[1]

In snakes

In snakes, the articular, surangular, and prearticular bones have fused to form the compound bone. The mandible is suspended from the quadrate bone and articulates at this compound bone.[2]

Function

In amphibians and reptiles

In most tetrapods, the articular bone forms the lower portion of the jaw joint. The upper jaw articulates at the quadrate bone. [3]

In mammals

In

analogous to, but not homologous to the articular process of the lower jaw
.

After the loss of the quadrate-articular joint, the squamosal and dentary bones form the new jaw joint in mammals.[6]

See also

References

  1. ^
    OCLC 53074665
    .
  2. OCLC 664665896
    .
  3. ^ "University of the Cumberlands, QUADRATE AND ARTICULAR EXPRESSION". Archived from the original on 2017-05-17. Retrieved 2016-07-16.
  4. ^ "Mammaliformes: Overview - Palaeos". Archived from the original on 2007-04-29.
  5. OCLC 664665896
    .
  6. OCLC 10710687
    .


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