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9 Cards in this Set

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Description: Scapula

Weight of upper extremity createsdownward rotation and protractionmoment on the scapula

Static Stabilizers: SCAPULA

■ Cohesive forces of subscapularbursa, SC, and AC joint ligaments


■ Scapulothoracic fascia

Muscular Stabilizers: SCAPULA

Scapulothoracic musculature, especiallyupper, middle, and lower trapezius,serratus anterior, levator scapula, andrhomboids

Description:Glenohumeral joint

In dependent position: if scapula is innormal alignment, weight of armcreates an inferior translationmoment on the humerus

GH Static Stabilizers: In dependent position: if scapula is in normal alignment, weight of arm creates an inferior translation moment on the humerus

■ Superior capsule, superior GHligament, and coracohumeralligament are taut


■ Adhesive and cohesive forces ofsynovial fluid and negative jointpressure hold surfaces together


■ Slight upward inclination of glenoidand labrum deepens fossa andimproves congruency; acts asinferior barrier

GH Muscular Stabilizers: In dependent position: if scapula is in normal alignment, weight of arm creates an inferior translation moment on the humerus

Rotator cuff, deltoid, long head of bicepsbrachii, pectoralis major, latissimusdorsi, and teres major

Description:Glenohumeral joint

When the humerus is elevating andthe scapula is rotating upward

GH Static Stabilizers: When the humerus is elevating and the scapula is rotating upward

■ Tension placed on static restraintsby the rotator cuff


■ Glenohumeral ligaments limitexcessive translations ofhumeral head

GH Muscular Stabilizers: When the humerus is elevating and the scapula is rotating upward

■ Rotator cuff and deltoid; elbow actionbrings in two-joint muscle support


■ Long head of biceps stabilizes againsthumeral elevation