Articulations
(Joints)
Articulations (joints) are where two or more bones meet. They function to hold bone together as well as allow for mobility. Joints are classified by both their structure and their function.
Functional & Structural Classification of Joint
Synarthroses
immovable joints, connected by fibrous connective tissue
example: skull sutures, distal tibiofibular joint
immovable joints, connected by fibrous connective tissue
example: skull sutures, distal tibiofibular joint
Amphiarthroses
Slightly movable joints, connected by cartilage
example: pubic symphysis, intervertebral joints
Slightly movable joints, connected by cartilage
example: pubic symphysis, intervertebral joints
Diarthroses
Freely moveable joints, enclosed by synovial membrane; most joint in the body are synovial
Articulating bones are separated by a joint cavity, in which synovial fluid is found. There are 4 distinguishing features of synovial joints;
Freely moveable joints, enclosed by synovial membrane; most joint in the body are synovial
Articulating bones are separated by a joint cavity, in which synovial fluid is found. There are 4 distinguishing features of synovial joints;
- articular cartilage
- articular capsule
- joint cavity
- reinforcing ligaments
Diarthroses joints are further categorized by shape:
Ball-and-Socket Joint
highest range of motion example: shoulder (glenohumeral), hip (acetabulofemoral) |
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