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7 Cards in this Set
- Front
- Back
Supraspinatus
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Origin: Supra-spinous fossa of scapula
Insertion: Greater tubercle of humerus Joint action: initiates humeral abduction, stabilizes teh humerus during abduction Pulls the head of the humerus into the glenoid fossa |
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Infraspinatus
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Origin: Infra-spinous fossa of scapula
Insertion: Greater tubercle of humerus Joint action: Later rotation , extension of the jumerus Reinforces the capsule of the shoulder joint |
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Teres Minor
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Origin: upper 2/3 of axillary border of scapula
Insertion: grater tubercle of humerus Joint Action: Lateral rotation, extension of the humerus |
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Subscapularis
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Origin: subscapular fossa of scapula
Insertion: Lesser tubercle of humerus Joint action: Medial rotation of the humerus, adduction of the humerus |
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Biceps Brachii
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Short head/long head
Origin: Short head - coricoid process of scapula Long head: Supraglenoid tubercle of scapula Insertion: Tuberosity of radius, Bicipital aponeurosis Joint action: Elbow flexion, Shoulder flexion, supination of the forarm Short head: flexion of the humerus |
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Brachialis
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Origin: Lower half of the anterior shaft
Insertion: Tuberosity of ulna, coronoid process of ulna Joint Action: Elbow Flexion **Most valuable position among the elbow flexiors |
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Brachioradialis
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Origin: Lateral supracondylar ridge of humerus
Insertion: Styloid process of radius Joint action: Elbow flexion (In nutral postion thumbs upward) |