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16 Cards in this Set
- Front
- Back
What muscles work to move the shoulder joint? |
Latissimus dorsi Teres major Supraspinatus Infraspinatus Teres minor Subscapularis Deltoid Pec major Coracobrachialis Biceps Brachii Triceps Brachii |
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Latissimus Dorsi O I A |
O: Spinous processes of T7-L5, Ribs 9 -12 (posterior surface), posterior iliac crest, posterior sacrum I: Intertubercular groove of humerus (medial lip) A: Extends the humerus, medially rotates the humerus, adducts the humerus (posteriorly) |
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Teres Major O I A |
O: inferior third of the lateral border of the scapula I: intertubercular drive of the humerus A: Extends the humerus, medially rotates the humerus, adducts the humerus |
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Supraspinatus O I A |
O: supraspinatus fossa of the scapula I: greater tubercle of the humerus A: abducts the humerus (first 10-15 degrees), prevents downward dislocation of humerus |
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Infraspinatus O I A |
O: infraspinatus fossa of the scapula I: greater tubercle of the humerus A: laterally rotates the humerus |
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Teres minor O I A |
O: superior two thirds of the lateral border of the scapula I: greater tubercle of the humerus A: laterally rotates the humerus, adducts the humerus |
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Subscapularis O I A |
O: subscapular fossa of the scapula I: lesser tubercle of the humerus A: medially rotates the humerus |
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Deltoid O I A |
O: lateral third of the clavicle, acromion process, scapular spine I: deltoid tuberosity A: flexes the humerus (anterior fibers), medially rotates the humerus (ant fibers), abducts the humerus (middle fibers), extends the humerus (posterior fibers), laterally rotates the humerus (post fibers) |
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Pectoralis major O I A |
O: medial half of the clavicle, edge of the sternal body, ribs 1-7 (costal cartilage) I: intertubercular groove of the humerus (lat lip) A: Adducts the humerus (ant), medially rotates the humerus, flexes the humerus, extends the humerus |
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Corachobrachialis O I A |
O: coracoid process of the scapula I: medial humeral shaft (middle region) A: flexes the humerus, adducts the humerus |
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What muscles act to flex the humerus? |
Ant deltoid Pectoralis major Coracobrachialis Biceps brachii |
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What mm act to extend the humerus? |
Latissimus dorsi Teres major Posterior deltoid Pectoralis major Triceps brachii |
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What mm act to medially rotate the humerus? |
Latissimus dorsi Teres major Subscapularis Ant deltoid Pectoralis major |
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What mm act to laterally rotate the humerus? |
Infraspinatus Teres minor Posterior deltoid |
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What mm act to abduct the humerus? |
Supraspinatus Middle deltoid |
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What mm act to adduct the humerus? |
Latissimus dorsi Teres major Teres minor Pectoralis major Coracobrachialis Triceps brachii |