overview Flashcards
what is scapula movement usually associated with
movement of humerus
where is the shoulder joint attached to the axial skeleton
via the clavicle, at the SC joint
humeral flexion and abduction require what movements of the scapula
elevation
upward rotation
abduction
humeral adduction and extension require what movements of the scapula
depression
downward rotation
adduction
scapular abduction occurs with what humeral movements
internal rotation
horizontal adduction
scapular adduction occurs with what humeral movements
external rotation
horizontal abduction
can shoulder joint move independently of scapula?
no, shoulder joint must move scapula when in motion
can humerus stay fixed during protraction and retraction of scapula?
no, humerus must internally rotate in protraction and externally rotate during retraction
what motion occurs at the humerus during protraction at the scapula
internal rotation
what motion occurs at the humerus during retraction at the scapula
external rotation
plane of motion and axis of rotation for humeral flexion [and extension ?]
sagittal plane, frontal axis
plane of motion and axis of rotation for humeral abduction [and adduction ?]
frontal plane, sagittal axis
the wide range of motion and high mobility at the shoulder joint comes at the cost of what?
high instability and significant laxity
at a joint, the relationship between stability and mobility is what?
inverse
what occurs in a rotator cuff impingement?
supraspinatus tendon causes the bursa to swell and in turn, the capsule puts pressure on the long head of the biceps tendon
inflammation of one structure in a very small space
