The Elbow and Radioulnar JointBone and ActionsChapter 6TerminologyCondyle – large round projectionEpicondyle – a projection located above a condyleFossa- hollow, depression or flattened surfaceTubercle - small round projection*Supination – external rotation of the radius*Pronation – internal rotation of the radiusRadiusradial tuberosityheadRadiusradial tuberosityheadUlnacoronoid processtrochlear (semilunar) notcholecranon processUlna1.olecranon process2.trochlear (semilunar) notch3.coronoid processHumerusmedial epicondylelateral epicondyletrochleacapitulumolecranon fossaheadHumerusHumerus2. lateral epicondyle3. capitulum4. trochlea5. medial epicondyle7. olecranon fossaScapulaglenoid fossacoracoid processScapula2. glenoid fossa1. coracoid processJointsHumeroulnar (elbow)humerus (trochlea) and ulna ( trochlear notch)hinge jointRadioulnarradius (head) and ulnapivot jointRadiohumeralLigamentsRadial collateralUlnar collateralAnnularLigamentsUlnar collateral ligamentActionsFlexion and Extension Elbow or Humeroulnar JointSagittal planeSupination and Pronation RadioulnarTransverse planeActionsELBOW EXTENSION ELBOW FLEXIONActionsUlnaPosterior AnteriorHumerusWhat is the action when an anterior muscle contracts?What is the action when a posterior muscle contracts?ActionsPronation & SupinationPronationRadius moves mediallyEnds up crossing the ulnaSupinationRadius moves laterallyEnds up parallel to the ulnaNeutral PositionActionsSynergy between jointsTightening a screw: supination and flexionLoosening a screw: pronation and extensionWhat positionhis right elbowin? His rightforearm? Hisleft elbow?What positionis his rightforearm in?What is hisname?What positionis his left elbowin?What positions are herright elbow and forearmin?What positions areher left elbow andforearm
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