Structural Classifications of Joints

Synovial Joints

1. The bones of this joint are held together by a fairly complex joint structure that includes a fluid cavity. They are found in most joints of the body, esp. in the appendicular joints. 2. All synovial joints from a diarthrosis fictional classification 3. Basic structures on a synovial joint: a. articular cartilage b. articular capsule - fibrous capsule and synovial membrane c. joint cavity (containing synovial fluid)

Gomphosis Joints

a. The bones of this type of joint are held together by a "peg and socket" or bolt-like formation. The only example of this joint in the body is the tech within the socket (alveolus). The short connective tissue fibers of the periodontal ligament hold the tooth within the socket. b. synarthrosis functional classification. no movement. c. examine the gomphosis joints of the jaw.

Syndesmosis Joints

a. The bones of this type of joint are held together by a fairly long strap-like and of ligamentous connective tissue that hold the bones of this type of joint. An example of a syndesmosis joint includes the fibrous distal attachment between the tibia and fibula. Another example is the interosseous membrane between the radius and ulna, or between the tibia and fibula. b. amphiarthrosis functional classification movement. little movement. c. examine the syndesmosis shown on the skeleton chart.

Symphysis Joints

a. The bones of this type of joint are held together by a plate of fibrocartilage. An example of the symphysis joint is the intervertebral discs between vertebrae b bodies, and the fibrocartilage interpubic disc at the symphysis pubis. b. amphiarthroisis functional classification. little movement. c. examine the symphysis pubis

Synchondrosis Joints

a. The bones of this type of joint are held together by a plate of hyaline cartilage. The joint connecting the first rib to the sternum is a synchondrosis joint. The costal cartilage that joins #1 to the sternum is composed of hyaline cartilage. Another example is the epiphyseal (growth) plate in developing bone. The plate of hyaline cartilage connects the epiphysis to the diaphysis in long bone. One the bone matures, the cartilage is replaced by bones resulting in a synostosis joint. b. synarthrosis functional classification. no movement. c. examine the synarthroses joints on the models and skeleton.

Sutural Joints

a. The bones of this type of joint have interdigitations that "interlock" the plates of bones. The sutural joints are located exclusively joining the majority of the bones of the skull. The adult skull will eventually become ossified, fussing the bones together an d forming a synostosis joint ("held by bone") b. synarthrosis functional classification. no movement. c. examine the sutural joints of the adult skull.