Muscles #3 Origin and Insertion Flashcards
Pectoralis Major
Origin: clavicular head, sternum, costal cartilages of ribs 2-6/1-7 (sternocostal head)
Insertion: greater tubercle and lateral lip of inter tubercular sulcus of humerus
Latissimus Dorsi
Origin: spines of T7-L5, crests of sacrum/ilium, ribs 9-12 via thoracolumbar fascia
Insertion: intertubercular sulcus of humerus
Deltoid
Origin: acromial extremity of clavicle (anterior f.), acromion of scapula (lateral f.), spine of scapula (posterior f.)
Insertion: deltoid tuberosity of humerus
Teres Major
Origin: inferior angle of scapula
Insertion: medial lip of intertubercular sulcus of humerus
Biceps Brachii
Origin: tubercle above glenoid cavity of scapula - supraglenoid tubercle (long head)
Insertion: radial tuberosity of radius and bicipital aponeurosis
Triceps Brachii
Origin: infraglenoid tubercle - projection inferior to glenoid cavity of scapula (long head)
Insertion: olecranon of ulna
Brachialis
Origin: distal anterior surface of humerus
Insertion: ulnar tuberosity + coronoid process of ulna
Brachioradialis
Origin: lateral border of distal end of humerus
Insertion: superior to styloid process of radius
Palmaris Longus
Origin: medial epicondyle of humerus
Insertion: flexor retinaculum and palmar aponeurosis
Flexor Carpi Radialis
Origin: medial epicondyle of humerus
Insertion: metacarpals II + III
Flexor Digitorum Superficialis
Origin: medial epicondyle of humerus; coronoid process of ulna; ridge along lateral margin/anterior surface of radius
Insertion: middle phalanx of each finger
Extensor Carpi Radialis Longus
Origin: Lateral supracondylar ridge of humerus
Insertion: Metacarpal II
Extensor Carpi Radialis
Brevis
Origin: Lateral epicondyle of humerus
Insertion: Metacarpal III
Extensor Digitorum
Origin: Lateral epicondyle of humerus
Insertion: Distal and middle phalanges of each finger
Extensor Digiti Minimi
Origin: Lateral epicondyle of humerus
Insertion: Tendon of extensor digitorum on phalanx V
