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The Shoulder Joint TEST MONDAY. Anterior Shoulder Muscles Coracobrachialis Pectoralis Major Subscapularis Biceps Brachii.

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Presentation on theme: "The Shoulder Joint TEST MONDAY. Anterior Shoulder Muscles Coracobrachialis Pectoralis Major Subscapularis Biceps Brachii."— Presentation transcript:

1 The Shoulder Joint TEST MONDAY

2 Anterior Shoulder Muscles Coracobrachialis Pectoralis Major Subscapularis Biceps Brachii

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4 Origin Short head: coracoid process of scapula Long head: supraglenoid tubercle of scapula Insertion Tuberosity of radius Action Flexion of the elbow and shoulder, Supinates forearm ***the long head is the “5 th rotator cuff”

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6 Coracobrachialis O: Coracoid process I: Anteromedial surface of midshaft of humerus Actions: (WEAK!) –Flexion –Adduction of the shoulder

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9 Pectoralis Major Origin: –Medial two-thirds of clavicle –Sternum Insertion: intertubercular groove Actions –Upper fibers (Clavicular) Flexion Horizontal Adduction –Lower fibers (Sternal) Internal/medial Rotation Horizontal adduction

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12 Subscapularis O: Subscapular fossa I: Lesser tubercle and crest of humerus Actions: –Internal Rotation Stabilization Anterior Rotator Cuff Muscle.

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14 Superior Shoulder Muscles Deltoid Supraspinatus

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16 Deltoid Origin –Lateral 1/3 of clavicle (Anterior fibers) –Acromion process (Middle fibers) –Spine of scapula (Posterior fibers) Insertion – deltoid tuberosity Actions Anterior –Flexion Middle – Abduction Posterior –Extension

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19 Supraspinatus O: Supraspinous fossa I: Greater tubercle Action: –Abduction Stabilization Superior Rotator Cuff Muscle. Most injured rotator cuff muscle

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21 Inferior Shoulder Muscles Latissimus Dorsi Teres Major

22 Latissimus Dorsi O: Spinous process of lower 6 thorasic and all lumbar and sacral vertebrae; iliac crest I: Intertubercular groove Actions: –Adduction –Internal Rotation

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25 Teres Major O: Inferior angle of scapula I: Intertubercular groove Actions: –Adduction –Internal rotation “Lats little helper”

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27 Posterior Shoulder Muscles Infraspinatus Teres Minor Triceps Brachii

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29 Origin Long head: infraglenoid tubercle of scapula Lateral head: posterior surface of humerus, Medial head: posterior surface of humerus, Insertion Olecranon process of ulna Action Chief extensor of elbow (long head extends the shoulder)

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31 Infraspinatus O: Infraspinous fossa I: Greater tubercle Actions: –External rotation Stabilization Posterior Rotator Cuff Muscle Second most commonly injured rotator cuff muscle

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34 Teres Minor O: lateral border of scapula I: Greater tubercle Actions: –External rotation Stabilization Posterior Rotator Cuff Muscle

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36 Muscles of the scapula only

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38 Trapezius Origin occipital bone, nuchal ligament, and spinous processes of C7 - T12 vertebrae Insertion Lateral third of clavicle, acromion, and spine of scapula Action superior fibers elevate, middle fibers retract, inferior fibers depress scapula;

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40 Levator Scapula Origin C1 - C4 vertebrae Insertion Superior angle Action Elevates scapula

41 Rhomboid major and minor

42 Origin Minor: spinous processes of C7 and T1 vertebrae Major: spinous processes of T2 - T5 vertebrae Insertion Medial border of scapula Action Retract scapula

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44 Serratus Anterior Origin the eight upper frontal ribs Insertion lateral border of scapula Action protracts scapula

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46 Name the muscle. Coracobrachialis Name the action Flexion and Adduction of the shoulder

47 Name the muscle. Pectoralis Major Function Horizontal Adduction Internal roatation

48 Name the muscle. Subscapularis Name the action Internal rotation of the shoulder

49 Name the muscle. Deltoid Name the action Abduction of shoulder (middle third) Flexion (anterior deltoid) Extension (posterior deltoid)

50 Name the muscle. Infraspinatus Name the action External rotation

51 Name the muscle. Teres Major Name the action Adduction of arm

52 Name the muscle. Teres Minor Name the action if the humerus move directly to the posterior Extension of the shoulder

53 Name the muscle. Supraspinatus Name the action Abduction of the shoulder

54 CoracobrachialisPect. Major Subscapularis Deltoid

55 SupraspinatusTeres Major Infraspinatus Teres Minor


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