review lab 2

review lab 2 - 9-1JointsJoints and their classificationbony...

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Unformatted text preview: 9-1JointsJoints and their classificationbony jointsfibrous jointscartilaginous jointsSynovial jointsAnatomy of selected diarthroseshumeroscapular jointelbow jointcoxal jointknee joint9-2Joints and Their ClassificationArthrology = study of the jointsKinesiology = study of musculoskeletal movementClassified by freedom of movementdiarthrosis (freely movable)amphiarthrosis (slightly movable)synarthrosis (little or no movement)Classified how adjacent bones are joined fibrous, cartilaginous, bony or synovialJoints!3 types of joints if we classify by function (i.e., by the degree of movement possible):1.DiarthrosesFreely moveable jointsShoulder, knee, hip, elbow, interphalangeal, tarsal, and carpal joints2.AmphiarthrosesSlightly moveable jointsIntervertebral discs, costosternal joints, pubic symphysis3.SynarthrosesJoints with little or no movementSkull sutures, mental symphysis, teeth in sockets, 1stcostosternal joint.Joint ClassificationWe can also classify joints by structure:1.Synovial joints:Bones separated by a joint cavity; lubricated by synovial fluid; enclosed in a fibrous joint capsule.Shoulder, hip, elbow, knee, carpal, interphalangealHow would we classify these joints functionally?Joint Classification1.Fibrous joints:Bones held together by collagenous fibers extending from the matrix of one bone into the matrix of the next.No joint cavitySkull sutures, teeth in joints, distal radioulnar joints & tibiofibular joints9-6Two bones bound by ligament onlyinterosseus membraneMost movable of fibrous jointsInterosseus membranes unite radius to ulna and tibia to fibulaFibrous Joint -- Syndesmosis9-7Fibrous Joint -- GomphosesAttachment of a tooth to its socket Held in place by fibrous periodontal ligamentcollagen fibers attach tooth to jawboneSome movement while chewingJoint Classifications1.Cartilaginous joints:Bones held together by cartilage; no joint cavityEpiphyseal plates of long bones, costosternal joints, pubic symphysis, intervertebral discs9-9Cartilaginous Joint -- SynchondrosisBones are joined by hyaline cartilagerib attachment to sternumepiphyseal plate in children binds epiphysis and diaphysis9-10Cartilaginous Joint -- Symphysis2 bones joined by fibrocartilagepubic symphysis and intervertebral discsOnly slight amount of movement is possible9-11...
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review lab 2 - 9-1JointsJoints and their classificationbony...

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