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9 Cards in this Set
- Front
- Back
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Description: Scapula |
Weight of upper extremity createsdownward rotation and protractionmoment on the scapula |
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Static Stabilizers: SCAPULA |
■ Cohesive forces of subscapularbursa, SC, and AC joint ligaments ■ Scapulothoracic fascia |
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Muscular Stabilizers: SCAPULA |
Scapulothoracic musculature, especiallyupper, middle, and lower trapezius,serratus anterior, levator scapula, andrhomboids |
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Description:Glenohumeral joint |
In dependent position: if scapula is innormal alignment, weight of armcreates an inferior translationmoment on the humerus |
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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 |
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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 |
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Description:Glenohumeral joint |
When the humerus is elevating andthe scapula is rotating upward |
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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 |
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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 |
