Essay About Elbow Flexionsupraglenoid Tubeshortcoracoid Processforearm Supination And Radial Nervetriceps

Upper Extremity Muscles
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Upper Extremity Muscles IICompartmentsDivided by lateral and medial intermuscular septumAnterior and posteriorAnterior compartment3 nerves:UlnarMedialMusculocutaneousTerminates anterior part of brachiumBiceps brachii (brachium)Two heads: Long: biarticular (crosses 2 joints) muscle → cant be an agonist Always a synergistAssists brachialis in elbow flexionSupraglenoid tubeShortCoracoid processForearm supination, assists elbow flexionMusculocutaneous nerveBrachialisPrimary elbow flexorAgonist for elbow flexionMusculocutaneous nerveCoracobrachialisAssists in shoulder flexion and adductionFixator for elbow flexionFixes shoulder joint so only elbow flexion occursMusculocutaneous nervePosterior compartmentSupplied by radial nerveTriceps brachiiThree heads:Long- infraglenoid tubercleBiarticular → crosses shoulder and elbow jointLateral-posterior humerus superior to radial grooveUniarticularMedial- posterior humerus inferior to radial grooveuniarticularElbow Extensor→AgonistAntagonist for elbow flexionRadial nerveAnconeusCompartments of the ForearmAnterior/posterior intermuscular septumInterosseous membraneAnterior compartmentAll flexors (flex wrist and fingers)Forearm flexorsPronatorsPosterior compartmentAll extensors (extend wrist and digits)Forearm extensorsSupinatorsCompartmentsAnterior (flexor/ pronator)Supplied by median nerve 1 ½ exceptions by ulnar1 flexor (anterior)½ flexor digitorum profundus  (½ ulnar, ½ median)Posterior (extensor/ supinator)Supplied by radial nerveRadial takes care of everything in posteriorAnteriorFlexor Carpi RadialisWrist flexion, radial deviationMedian nerveFlexor Capri UlnarisWrist flexion, ulnar deviationUlnar nervePosteriorExtensor carpi Radialis LongusWrist extension, radial deviationRadial nerveExtensor Carpi UlnarisWrist extension, ulnar deviationRadial nerveFlexion and Extension occurs on the sagittal plane alone the Medial/ Lateral AxisFlex/ext are both anterior to the medial lateral axisAbduction→Radial DeviationAdduction→Ulnar Deviation