Shoulder girdle movements = scapula movements
when the shoulder joint External rotation the shoulder girdle ?
-Adduction (retraction)
when the shoulder joint Internal rotation the shoulder girdle
Abduction (protraction
when the shoulder joint Horizontal abduction the shoulder girdle
Adduction (retraction)
when the shoulder joint Extension the shoulder girdle ?
Depression/downward rotation
when the shoulder joint flexion the shoulder girdle
Elevation/upward rotation
why would a glenoid humeral joint be injured
Glenohumeral Joint • Frequently injured due to anatomical design - shallowness of glenoid fossa - laxity of ligamentous structures - lack of strength & endurance in muscles - anterior or anteroinferior glenohumeral subluxations & dislocations - common - posterior dislocations - rare - posterior instability problems somewhat commo
Scapula adduction
Humeral external rotation & horizontal abduction
Scapula abduction
Humeral internal rotation & horizontal adduction
what serves as attachment to the shoulder joint muscle
Scapula clavical and humerous
Humeral adduction & extension
Scapula depression, downward rotation, & adduction
Humeral flexion & abduction
Scapula elevation, upward rotation, & abduction
Rotator cuff is frequently injured because
Subscapularis, supraspinatus, infraspinatus, & teres minor muscles - attach to the front, top, & rear of humeral head - point of insertion enables humeral rotation - vital in maintaining humeral head in correct approximation within glenoid fossa while more powerful muscles move humerus through its wide range of motion
when the Shoulder joint Abduct the shoulder girdle?
Upward rotation
when the shoulder Joint Horizontal adduction - the shoulder girdle
abdution (protraction
Depression
downward or inferior movement, as in returning to normal position
what the shoulder joint Adduct the shoulder girdle
downward rotate
Glenohumeral Joint
multiaxial ball- &-socket • enarthrodial
Sternoclavicular/ • Acromioclavicular (AC)
multiaxial) arthrodial classification Movements anteriorly 15 degrees with protraction posteriorly 15 degrees with retraction superiorly 45 degrees with elevation inferiorly 5 degrees with depression -AC arthrodial classification - 20- to 30-degree total gliding & rotational motion accompanying other shoulder girdle & shoulder joint motions
Scapulothoraci
not a true synovial joint does not have regular synovial features movement depends on SC & AC joints which allows the scapula to move 25-degrees abduction-adduction 60-degrees upward-downward rotation 55-degrees elevation-depression
Downward rotation
returning inferior angle inferomedially toward spinal column & glenoid fossa to normal position
Abduction (protraction
scapula moves laterally away from spinal column
Adduction (retraction)
scapula moves medially toward spinal column
The shoulder joint attach to the axial skeletal through which joint
the sc joint and the clavicle scapula movement usual occur with the with the humorous
Upward rotation
turning glenoid fossa upward & moving inferior angle superolaterally away from spinal column
Elevation
upward or superior movement, as in shrugging shoulders