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32 Cards in this Set
- Front
- Back
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What 3 muscles are the primary external rotators of the shoulder?
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Infraspinatus, Post Deltoid and Teres Minor
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What nerve roots innervate the Serratus Anterior?
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C5,6,7,8
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During the early phase of shoulder abduction (0-90 degrees) how much motion comes from the SC joint?
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25 dregrees of elevation
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During the early phase of shoulder abduction (0-90 degrees) how much motion comes from the AC joint?
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5 degrees of upward rotation
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During the early phase of shoulder abduction (0-90 degrees) how much motion comes from the GH joint?
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60 degrees
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During the late phase of shoulder abduction (90-180 degrees) how much motion comes from the SC joint?
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5 degrees of elevation and 35 degrees of posterior rotation
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During the late phase of shoulder abduction (90-180 degrees) how much motion comes from the AC joint?
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25 degrees of upward rotation
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During the late phase of shoulder abduction (90-180 degrees) how much motion comes from the GH joint?
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60 degrees
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What nerve roots innervate the supraspinatus?
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C5,6
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What nerve roots innervate the Subscapularis?
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C5,6,
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What nerve roots innervate the Teres Minor?
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C5,6
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What nerve roots innervate the Infraspinatus?
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C5,6
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What nerve roots innervate the Teres Major?
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C5,6,7
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Name the muscles that produce IR.
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Pect Major, Teres Major, Lat Dorsi, Ant Deltoid and Subscapularis
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Describe what is meant by the term "Scapular Plane."
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It is when abduction is performed with the arm in about 35 degrees anterior to the frontal plane. It minimizes impingement of the humeral head against the acromion during abduction.
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True or False: the humeral head is in retroversion.
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True
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What are the ramifications of a retroverted humeral head?
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ER has more motion than IR
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What structure helps to add congruency to the glenohumeral articulation?
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Glenoid Labrum
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What muscles elevate the scapula?
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Levator Scapulae and Upper Trapezius
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What muscles retract the scapula?
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Rhomboid major and minor, Middle trapezius
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When performing abduction of the shoulder, what rotation should also occur?
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ER, this prevents the greater tuberosity from impinging against the acromion process
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What motions can the Latissimus Dorsi produce?
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Glenohumeral ext, IR and ADD
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Name the joints that make up the Shoulder Complex.
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SC, AC, Glenohumeral and Scapulothoracic
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What muscles form the force couple which upwardly rotate the scapula?
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Serratus Anterior, Upper and lower trapezius
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What are the primary scapular downward rotators?
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Rhomboids and Pect Minor
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What nerve innervates the Serratus Anterior?
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Long Throracic
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What muscles make up the Rotator Cuff?
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Subscapularis, Supraspinatus, Infraspinatus and Teres Minor
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What muscle inserts lateral to the bicipital groove?
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Pect Major
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What is the loosed packed position of the Glenohumeral joint?
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55 degrees of abduction and 30 degrees of horiztonal adduction
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What is the closed packed position of the AC joint?
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Upward rotation of the scapula |
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What is the closed packed position of the SC joint?
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Post rotation of the clavicle |
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What is the ratio between glenohumeral and scapulothoracic motion during abduction? |
2:1 |
