What king of joint is the jaw?!
Question: What king of joint is the jaw.?
Most people say it is a hinge joint, but that doesn't explain why it can move in a bunch of different directions. I think it is a ball-and-socket joint, but I'm not sure.Health Question & Answer
Answers:
Temporomandibular joint
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Temporomandibular joint
Articulation of the mandible. Lateral aspect.
Articulation of the mandible. Medial aspect.
Latin articulatio temporomandibularis
Gray's subject #75 297
Artery superficial temporal artery
Nerve auriculotemporal nerve, masseteric nerve
MeSH Temporomandibular+Joint
Dorlands/Elsevier a_64/12161641
The temporomandibular joint is the joint of the jaw and is frequently referred to as TMJ. There are two TMJs, one on either side, working in unison. The name is derived from the two bones which form the joint: the upper temporal bone which is part of the cranium (skull), and the lower jaw bone called the mandible. The unique feature of the TMJs is the articular disc. The disc is composed of fibrocartilagenous tissue (like the firm and flexible elastic cartilage of the ear) which is positioned between the two bones that form the joint. The TMJs are one of the only synovial joints in the human body with an articular disc, another being the sternoclavicular joint. The disc divides each joint into two. The lower joint compartment formed by the mandible and the articular disc is involved in rotational movement (opening and closing movements). The upper joint compartment formed by the articular disk and the temporal bone is involved in translational movements (sliding the lower jaw forward or side to side). The part of the mandible which mates to the under-surface of the disc is the condyle and the part of the temporal bone which mates to the upper surface of the disk is the glenoid (or mandibular) fossa.
Hope this helped!!!!Health Question & Answer
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Temporomandibular joint
Articulation of the mandible. Lateral aspect.
Articulation of the mandible. Medial aspect.
Latin articulatio temporomandibularis
Gray's subject #75 297
Artery superficial temporal artery
Nerve auriculotemporal nerve, masseteric nerve
MeSH Temporomandibular+Joint
Dorlands/Elsevier a_64/12161641
The temporomandibular joint is the joint of the jaw and is frequently referred to as TMJ. There are two TMJs, one on either side, working in unison. The name is derived from the two bones which form the joint: the upper temporal bone which is part of the cranium (skull), and the lower jaw bone called the mandible. The unique feature of the TMJs is the articular disc. The disc is composed of fibrocartilagenous tissue (like the firm and flexible elastic cartilage of the ear) which is positioned between the two bones that form the joint. The TMJs are one of the only synovial joints in the human body with an articular disc, another being the sternoclavicular joint. The disc divides each joint into two. The lower joint compartment formed by the mandible and the articular disc is involved in rotational movement (opening and closing movements). The upper joint compartment formed by the articular disk and the temporal bone is involved in translational movements (sliding the lower jaw forward or side to side). The part of the mandible which mates to the under-surface of the disc is the condyle and the part of the temporal bone which mates to the upper surface of the disk is the glenoid (or mandibular) fossa.
Hope this helped!!!!Health Question & Answer
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