Appendicular skeleton (4 slides).pdf - The Appendicular Skeleton The Appendicular Skeleton \u2022 Pectoral girdle \u2013 Attaches the upper limbs to the trunk

Appendicular skeleton (4 slides).pdf - The Appendicular...

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8/25/20151The Appendicular SkeletonThe Appendicular SkeletonPectoral girdleAttaches the upper limbs to the trunkPelvic girdleAttaches the lower limbs to the trunkUpper and lower limbs differ in functionShare the same structural planThe Pectoral GirdleProvides attachment for many muscles thatmove the upper limbGirdle is very light and upper limbs are mobileOnly clavicle articulates with the axial skeletonSocket of the shoulder joint (glenoid cavity) isshallowGood for flexibility, bad for stabilityClavicleAcromio-clavicularjointScapula(a) Articulated pectoral girdleArticulated Pectoral Girdle
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8/25/20152ClaviclesProvide attachment for musclesHold the scapulae and arms laterallyTransmit compression forces from the upperlimbs to the axial skeletonClaviclesFigure 8.1b, cAcromial (lateral)end(b) Right clavicle, superior viewPosteriorSternal (medial)endAnteriorAcromial endConoid tubercleAnteriorPosteriorSternal end(c) Right clavicle, inferior viewScapulaeLie on the dorsal surface of the rib cageLocated between ribs 2–7Have three bordersSuperiorMedial (vertebral)Lateral (axillary)Have three anglesLateral, superior, and inferiorStructures of the ScapulaFigure 8.2aAcromionCoracoidprocessSuprascapular notchSuperior borderSuperiorangleSubscapularfossaMedial borderInferior angleGlenoidcavityLateral border(a) Right scapula, anterior aspect
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8/25/20153SuperiorangleMedial borderCoracoid processSuprascapular notchAcromionGlenoidcavityat lateralangleLateral borderInfraspinousfossaSpine(b) Right scapula, posterior aspectSupraspinousfossaStructures of the ScapulaFigure 8.2bStructures of the ScapulaFigure 8.2cCoracoidprocessGlenoidcavity(c) Right scapula, lateral aspectInfraglenoidtubercleSupraglenoidtubercleSupraspinous fossaSubscapularfossaInferior angleAcromionInfraspinousfossaSpineSupraspinousfossaInfraspinousfossaSubscapularfossaPosteriorAnteriorThe Upper Limb30 bones form each upper limbGrouped into bones of the:ArmForearmHandArmRegion of the upper limb between theshoulder and elbowHumerusLongest and strongest bone of the upper limbArticulates with the scapula at the shoulderArticulates with the radius and ulna at the elbow
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8/25/20154Structures of the Humerus of the Right ArmGreater tubercleLesser tubercleIntertubercularsulcusRadial fossaCapitulumHead of humerusAnatomical neckDeltoid tuberosityCoronoid fossaMedial epicondyleTrochlea(a) Anterior viewStructures of the Humerus of the Right ArmFigure 8.3a, bHead of humerusAnatomical neckRadial grooveOlecranon fossaMedial epicondyleTrochleaSurgical neckDeltoid tuberosityGreater tubercleLateral epicondyle(b) Posterior viewStructures of the Humerus of the RightArmFigure 8.3c, dCoronoid
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