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79 Cards in this Set
- Front
- Back
Origin of the Pec Major |
Clavicular head: anterior surface of the medial half of the clavicle
Sternocostal head: anterior surface of the sternum, superior 6 costal cartilages, apopneurosis of external oblique |
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Insertion of Pec Major
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Lateral lip of intertubercular sulcus of humerus
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Innervation of Pec Major
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Lateral and medial nerves |
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Main action of Pec Major
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Adducts and medically rotates humerus, draws scapula inferiority and anteriorly.
Clavicular head: flexes humerus Sternocostal head: extends humerus |
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Origin of Pec Minor
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3rd-5th ribs near costal cartilage
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Insertion of Pec Minor
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Medial border and superior surface of coracoid process of scapula
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Innervation of Pec Minor
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Medial pectoral nerve
C8, T1 |
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Main action of Pec Minor
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Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall |
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Origin of the serratus anterior
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External surfaces of lateral parts of 1st-8th ribs
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Insertion of the serratus anterior
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Anterior surface of medial border of scapula
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Trapezius action
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Descending part elevates scapula
Ascending part depresses scapula Middle part retracts scapula Descending and ascending together rotate glenoid cavity superiorly |
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Latissimus Dorsi origin
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Spinous process of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs
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Origin of subclaviusinsertion
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Junction of 1st rib and it's costal cartilage
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Insertion of subclavius
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Inferior surface of middle third clavicle
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Latissimus Dorsi action
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Extends, Adducts, and medially rotates humerus |
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Levator Scapulae origin
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Posterior turbercules of transverse processes of C1-C4
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Trapezius origin
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Medial third of superior nuchal line, external occipital protuberance, nuchal ligament, spinous process of C7-T12
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Trapezius insertion |
Lateral third if clavicle, acromion and spine of scapula
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Levator Scapulae action
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Elevates scapula and rotates it's glenoid cavity inferiorly by rotating scapula
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Insertion of the serratus anterior
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Anterior surface of medial border of scapula
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Latissimus Dorsi origin
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Spinous process of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs
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Latissimus Dorsi insertion
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Floor of intertubercular sulcus of humerus
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Rhomboid major/minor innervation
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Dorsal scapular nerve *C5, C4
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Rhomboid major/minor action
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Retracts scapula, rotates glenoid cavity inferiorly, fixes to thoracic wall
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Levator Scapulae origin
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Posterior turbercules of transverse processes of C1-C4
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Levatir Scapulae insertion
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Medial border of the superior angle of the scapula to the root of scapulae spine
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Innervation of serratus anterior
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Long thoracic nerve, C5, *C6, *C7
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Main action of serratus anterior
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Protects scapula and holds it against thoracic wall, rotates scapula
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Rhomboid Minor Orign
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Nuchal ligament, spinous process of C7-T1
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Rhomboid minor insertion
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Medial side of scapula by spine root
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Innervation of subclavius
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Nerve to subclavius, *C5, C6
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Main action of subclavius
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Anchors and depresses clavicle |
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Rhomboid Major origin
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Spinous process of T2-T5
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Rhomboid major insertion
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Medial border of scapula from spine to inferior angle
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Origin of deltoid
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Lateral third of clavicle, acromion and spine of scapula
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Insertion of deltoid
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Deltoid tuberosity of humerus
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Innervation of deltoid
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Axillary nerve *C5 C6 |
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Teres Minor origin
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Middle part if lateral border of scapula
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Supraspinatus origin
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Supraspinatus fossa of scapula
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Supraspinatus insertion
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Superior facet of greater tubercle of humerus
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Action of teres minor
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Laterally rotates arm, rotator cuff |
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Teres major origin
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Posterior surface of inferior angle of scapula
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Infraspinatus origin
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Infraspinous fossa of scapula
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Insertion of infraspinatus |
Middle facet of greater tubercle of humerus
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Action of teres major
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Adducts and medially rotates arm
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Subscapularis origin
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Subscapular fossa on anterior surface of scapula
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Teres Minor origin
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Middle part if lateral border of scapula
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Teres minor insertion
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Inferior facet of greater tubercle of humerus
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Innervation of subscapularis
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Upper and lower subscapular nerves C5, *C6, C7
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Action of subscapularis
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Medially rotates arm, rotator cuff, helps hold head of humerus in glenoid cavity
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Teres major origin
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Posterior surface of inferior angle of scapula
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Teres major insertion
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Medial lip of intertubercular sulcus of humerus
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Supraspinatus insertion
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Superior facet of greater tubercle of humerus
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Innervation of supraspinatus
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Suprascapular nerve C4 *C5 C6
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Subscapularis origin
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Subscapular fossa on anterior surface of scapula
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Subscapularis insertion
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Lesser tubercule of humerus
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Insertion of infraspinatus
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Middle facet of greater tubercle of humerus
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Innervation of infraspinatus
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Suprascapular nerve *C5, C6
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Action of infraspinatus
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Laterally rotates arm, rotator cuff muscle
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Origin of Biceps Brachii |
long head: supraglenoid tubercle of scapula short head: tip of coracoid process |
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Insertion of Biceps Brachii |
radial tuberosity and apopneurosis of flexor muscles of lower arm |
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Action of bicep |
flexes and supinates the forearm |
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innervation of bicep |
musculocutaneous nerve (C5, *C6, C7) |
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origin coracobrachialis |
tip of coracoid process |
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insertion of coracobrachialis |
anteromedial surface of humerus shaft |
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action of coracobrachialis |
flexion and adduction of humerus |
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innervation of coracobrachialis |
musculocutaneous nerve (C5-C7) |
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origin of the brachialis |
distal half of anterior surface of humerus |
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insertion of the brachialis |
coranoid process and tuberosity of ulna |
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action of the brachialis |
flexes humerus |
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innervation of the brachialis |
musculocutaneous and radial nerve (C5, C6) |
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origin of the tricep |
long head: infraglenoid tubercle of scapula medial: distal two thirds of medial and posterior surface of humerus lateral: upper half of posterior surface of humerus |
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insertion of tricep |
posterior surface of the olecranon process of ulna |
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action of tricep |
extends the forearm and the tendon of the long head, helps stabilize the shoulder joint |
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innervation of tricep |
radial nerve (C6, C7, C8) |
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origin of the anconeous |
posterior surface of the lateral epicondyle of humerus |
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insertion of the anconeus |
lateral surface of the olecranon process and posterior proximal surface of ulna |
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action of anconeus |
extends forearm and stabilizes the elbow joint |
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innervation of anconeus |
radial nerve (C6-C8) |