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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Descending part elevates; ascending part depresses; and middle part (or all parts together) retracts scapula; descending and ascending parts act together to rotate glenoid cavity superiorly
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Trapezius;
Medial third of superior nuchal line; external occipital protuberance; nuchal ligament; spinous processes of C7-T12 vertebrae; Lateral third of clavicle; acromion and spine of scapula; Spinal accessory nerve (CN XI) (motor fibers) and C3, C4 spinal nerves (pain and proprioceptive fibers) |
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Extends, adducts, and medially rotates humerus; raises body toward arms during climbing
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Latissimus dorsi;
Spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs; Floor of intertubercular sulcus of humerus; Thoracodorsal nerve (C6, C7, C8) |
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Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula
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Levator Scapulae;
Posterior tubercles of transverse processes of C1-C4 vertebrae; Medial border of scapula superior to root of scapular spine; Dorsal scapular (C5) and cervical (C3, C4) nerves |
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Retract scapula and rotate it to depress glenoid cavity; fix scapula to thoracic wall
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Rhomboid major;
Major: spinous processes of T2-T5 vertebrae; medial border of scapula from level of spine to inferior angle; Dorsal scapular nerve (C4, C5) Rhomboid minor; nuchal ligament; spinous processes of C7 and T1 vertebrae; smooth triangular area at medial end of scapular spine; Dorsal scapular nerve (C4, C5) |
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Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly
Acting alone, clavicular head flexes humerus and sternocostal head extends it from the flexed position |
Pectoralis major;
Clavicular head: anterior surface of medial half of clavicle Sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle; Lateral lip of intertubercular sulcus of humerus; Lateral and medial pectoral nerves; clavicular head (C5, C6), sternocostal head (C7, C8, T1) |
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Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall
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Pectoralis minor;
3rd-5th ribs near their costal cartilages; Medial border and superior surface of coracoid process of scapula; Medial pectoral nerve (C8, T1) |
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Anchors and depresses clavicle
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Subclavius;
Junction of 1st rib and its costal cartilage; Inferior surface of middle third of clavicle; Nerve to subclavius (C5, C6) |
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Protracts scapula and holds it against thoracic wall; rotates scapula
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Serratus anterior;
External surfaces of lateral parts of 1st-8th ribs; Anterior surface of medial border of scapula; Long thoracic nerve (C5, C6, C7) |
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Supinates forearm and, when it is supine. flexes forearm; short head resists dislocation of shoulder
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Biceps brachii;
Short head: tip of coracoid process of scapula Long head: supraglenoid tubercle of scapula; Tuberosity of radius and fascia of forearm via bicipital aponeurosis; Musculocutaneous nerve (C5, C6, C7) |
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Helps flex and adduct arm; resists dislocation of shoulder
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Coracobrachialis;
Tip of coracoid process of scapula; Middle third of medial surface of humerus; Musculocutaneous nerve (C5, C6, C7) |
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Flexes forearm in all positions
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Brachialis;
Distal half of anterior surface of humerus; Coronoid process and tuberosity ulna; Musculocutaneous nerveb (C5, C6) and radial nerve (C5, C7) |
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Chief extensor of forearm; long head resists dislocation of humerus; especially important during adduction
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Triceps brachii;
Long head: infraglenoid tubercle of scapula Lateral head: posterior surface of humerus, superior to radial groove; Proximal end of olecranon of ulna and fascia of forearm; Radial nerve (C6, C7, C8) |
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Assists triceps in extending forearm; stabilizes elbow joint; may abduct ulna during pronation
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Anconeus;
Lateral epicondyle of humerus; Lateral surface of olecranon and superior part of posterior surface of ulna; Radial nerve (C7, C8, T1) |
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Clavicular (anterior) part: flexes and medially rotates arm
Acromial (middle) part: abducts arm Spinal (posterior) part: extends and laterally rotates arm |
Deltoid;
Lateral third of clavicle, acromion and spine of scapula; Deltoid tuberosity of humerus; Axillary nerve (C5, C6) |
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Initiates and assists deltoid in abduction of arm and acts with rotator cuff muscles 1st 30 degrees.
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Supraspinatus;
Supraspinous fossa of scapula; Superior facet of greater tubercle of humerus; Suprascapular nerve (C4, C5, C6) |
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Laterally rotates arm; and acts with rotator cuff muscles
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Infraspinatus;
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Infraspinous fossa of scapula;
Middle facet of greater tubercle of humerus; Suprascapular nerve (C5, C6) |
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Laterally rotates arm; and acts with rotator cuff muscles
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Teres minor;
Middle part of lateral border of scapula; Inferior facet of greater tubercle of humerus Axillary nerve (C5, C6) |
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Adducts and medially rotates arm
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Teres major;
Posterior surface of inferior angle of scapula; Medial lip of intertubercular sulcus of humerus; Lower subscapular nerve (C5, C6) |
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Medially rotates arm; as part of rotator cuff, helps hold head of humerus in glenoid cavity
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Subscapularis;
Subscapular fossa (most of anterior surface of scapula); Lesser tubercle of humerus; Upper and lower subscapular nerves (C5, C6, C7) |
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