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Glenohumeral Motions - Coggle Diagram

- - - - plane
        
        sagittal plane
        
        axis
        
        medial-lateral axis
        
        arthrokinematics
        
        During these actions, the humeral head spins
        on the glenoid fossa about a relatively fixed axis
        
        arthrokinematic roll and
        slide is not necessary.
      - flexion
        
        GH- 45 degrees
        
        total-120 degrees of flexion
        is obtained by
        incorporating approximately
        60 degrees of scapular upward rotation.
      - extension
        
        GH joint- 30-50 degree
    - - plane
        
        frontal plane
        
        axis
        
        anterior-posterior axis
        
        which courses through
        the humeral head
        
        arthrokinematics
        
        convex on concave
        convex head
        of the humerus rolling superiorly while simultaneously sliding inferiorly
        (intra articular contribution)
      - abduction
        
        GH-120 degrees
        
        the full 180 degrees of shoulder abduction
        normally occurs by combining 60 degrees of scapular upward
        rotation with the abduction of the GH joint.
      - adduction
        
        @ GH- is 0 degrees.
        
        @ shoulder complex as a whole- 50 degrees
    - - plane
        
        horizontal plane
        
        axis
        
        vertical (longitudinal) axis of rotation
        
        arthrokinametics
        
        internanal rot
        
        results in the anterior surface of the humerus rotating medially, toward the midline,
        
        external rot
        
        results in the anterior surface of the humerus rotating laterally, away from the midline.
      - medial rotation
        
        70-90 degree
        
        When arm is at side, medial n lat rota is restricted, due to protruding lesser n grater tubercle
        When arm is abducted, top abt 90 degrees, there is greater lateral n medial rot due to greater n lesser tubercle is out of the way
      - lateral rotation
        
        80-90 degree