IB131_9.14.09 Articulations - Articulations...

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± Articulations Body movement occurs at joints (articulations) here two bones connect where two bones connect ± Joint Structure Determines direction and distance of movement nge of motion ( range of motion ) Joint strength as mobility 1
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± Two methods of classification Structural classification based on the anatomical organization of joint Bony brous Fibrous Cartilaginous synovial Functional classification based on range of motion of joint Synarthrosis (immovable) Amphiarthrosis (slightly movable) Diarthrosis (freely movable) 2
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Synarthrosis ( immovable joint ) No movement Fibrous or cartilaginous connections ay fuse over time May fuse over time Amphiarthrosis ( slightly movable joint ) Little movement Fibrous or cartilaginous connections Diarthrosis ( freely movable joint ) More movement Also called synovial joints bdivided by type of motion Subdivided by type of motion 3
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± Synarthroses (immovable joints) Are very strong ges of bones may touch or interlock Edges of bones may touch or interlock Four types of synarthrotic joints: ture suture gomphosis synchondrosis synostosis 6
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Suture Bones interlocked Are bound by dense fibrous connective tissue re found only in skull Are found only in skull Gomphosis Fibrous connection ( periodontal ligament ) Binds teeth to sockets Synchondrosis iid til i bid bt t b Is a rigid cartilaginous bridge between two bones: epiphyseal cartilage of long bones between vertebrosternal ribs and sternum nostosis Synostosis Fused bones, immovable: epiphyseal lines of long bones 7
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Amphiarthroses More movable than synarthrosis ronger than freely movable joint Stronger than freely movable joint Two types of amphiarthroses syndesmosis : » bones connected by ligaments symphysis : » bones separated by fibrous cartilage 8
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± novial joints (diarthroses) Synovial joints (diarthroses) Also called movable joints At ends of long bones Within articular capsules Lined with synovial membrane 9
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± Gap between two bones ossifies frontal and mandibular bones in infants cranial sutures in elderly attachment of first rib and sternum ± Can occur in either fibrous or cartilaginous joint 10
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± ollagen fibers span the space between Collagen fibers span the space between bones tures mphoses ndesmoses sutures, gomphoses & syndesmoses 11
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± Immovable fibrous joints bind skull bones together ± Serrate interlocking lines ronal gittal mbdoid tures coronal, sagittal & lambdoid sutures ± Lap overlapping beveled edges temporal and parietal bones ± Plane straight, non overlapping edges alatine processes of the maxillae palatine processes of the maxillae 12
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This note was uploaded on 09/29/2009 for the course INTEG BIO 131 taught by Professor Lewis during the Fall '09 term at University of California, Berkeley.

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IB131_9.14.09 Articulations - Articulations...

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