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In jawed vertebrates, the mandible (from the Latin mandibula, 'for chewing'), lower jaw, or jawbone is a bone that makes up the lower – and typically more mobile – component of the mouth (the upper jaw being known as the maxilla). The jawbone is the skull's only movable, posable bone, sharing joints with the cranium's temporal bones.
The jaw in tetrapods is substantially simplified compared to fish. Most of the upper jaw bones (premaxilla, maxilla, jugal, quadratojugal, and quadrate) have been fused to the braincase, while the lower jaw bones (dentary, splenial, angular, surangular, and articular) have been fused together into a unit called the mandible. The jaw articulates ...
Example of a cleft chin (William McKinley) Human jaw front view. The terms cleft chin, [15] chin cleft, [15] [16] dimple chin, [17] [18] or chin dimple [15] refer to a dimple on the chin. It is a Y-shaped fissure on the chin with an underlying bony peculiarity. [19]
In humans, the mandible, or lower jaw, is connected to the temporal bone of the skull via the temporomandibular joint. This is an extremely complex joint which permits movement in all planes. The muscles of mastication originate on the skull and insert into the mandible, thereby allowing for jaw movements during contraction.
Jaw misalignment looks different for everyone, but for many, jaw misalignment pain starts in the temporomandibular joints (TMJ), which are located on both sides of the face and connect the ...
While primary aspects of the voice are produced in the throat, the tongue, lips, and jaw are also needed to produce the range of sounds included in speech. The mouth consists of two regions, the vestibule and the oral cavity proper. The mouth, normally moist, is lined with a mucous membrane, and contains the teeth.
Shortness of breath, jaw pain, and fatigue are common symptoms that can signal an underlying medical condition. Dr. Natalie Azar tells us when to see a doctor. ... The bottom line: Listen to your ...
An intact prehistoric mastodon jaw was discovered in the backyard of a Hudson Valley house after the homeowner initially saw a pair of teeth poking up by a plant, according to state officials.