PLN 103 Lecture Notes - Lecture 9: Frontal Suture, Hyaline Cartilage, Joint Capsule
17 Nov 2015
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Document Summary
Body movement occurs at joints (articulations) where two bones connect. Joint structure: determines direction and distance of movement (range of motion or rom), joint strength decreases as mobility increases. Functional classification is based on range of motion of the joint. Structural classification relies on the anatomical organization of the joint. Functional classifications: synarthrosis (immovable joint), amphiarthrosis (slightly movable joint), diarthrosis (freely movable joint): knee. Structural classifications: bony, fibrous, cartilaginous, synovial: knee contains synovial fluid. Synarthroses (immovable joints): are very strong, edges of bones may touch or interlock. Suture: bones interlocked, bound by dense fibrous connective tissue, found only in skull. Gomphosis: fibrous connection (periodontal ligament), binds teeth to sockets. Synchondrosis: is a rigid cartilaginous bridge between two bones, epiphyseal cartilage of long bones, between vertebrosternal ribs and sternum. Synostosis: fused bones, immovable, metopic suture of skull, epiphyseal lines of long bones. More movable than synarthrosis, stronger than freely movable joint, two types of amphiarthroses.
