|
Origin
|
Insertion
|
Action
|
Answer
|
Occipital bone, nuchal ligament, & spinous processes C7-T12 |
Acromion & spine of scapula, lateral clavicle
|
Stabilizes, elevates, retracts & rotates (upward) scapula
|
Trapezius
|
|
Spinous processes of C7-T5
|
Medial border of scapula
|
Stabilize scapula; retract, rotate scapula downward |
Rhomboids (major & minor)
|
Spinous processes of T7-L5, ribs 9-12, iliac crest |
Intertubercular sulcus of humerus
|
Extends (PM), adducts, medially rotates humerus |
Latissimus dorsi
|
Sternum, medial clavicle, ribs 1-6; aponeurosis of ext.oblique muscle |
Greater tubercle of humerus
|
Flexes (PM), medially rotates, & adducts humerus
|
Pectoralis major
|
|
Anterior surface of ribs 3-5 [or 2-4]
|
Coracoid process of scapula
|
Protract and rotate scapula downward |
Pectoralis minor
|
|
Ribs 1-9
|
Medial border of scapula
|
Rotates scapula (upward); protracts scapula (PM) |
Serratus anterior
|
Lateral ⅓ of clavicle, acromion and spine of scapula |
Deltoid tuberosity of humerus
|
Abduction of humerus (PM); flexion, extension; medial and lateral rotation of humerus |
Deltoid
|
Posterior surface of scapula at inferior angle |
Lesser tubercle of humerus
|
Extend, medially rotate, and adduct humerus |
Teres major
|
SH - coracoid process of scapula LH - supraglenoid tubercle of scapula |
Radial tuberosity
|
Flex & supinate forearm (PM); LH can also flex humerus |
Biceps brachii
|
|
Distal anterior humerus
|
Coronoid process of ulna
|
Flex forearm (PM)
|
Brachialis
|
|
Coracoid process of scapula
|
Medial surface of humerus
|
Flex & adduct humerus
|
Coracobrachialis
|
LgH - infraglenoid tubercle of scapula LtH & MH - posterior humerus |
Olecranon process of ulna
|
Extend forearm (PM)
|
Triceps brachii
|
|
Lateral epicondyle of humerus
|
Lateral aspect of olecranon of ulna
|
Extend forearm
|
Anconeus
|
|
Medial epicondyle of humerus
|
Fascia of palm
|
Tenses skin of palm; weak wrist flexor |
Palmaris longus
|
|
Medial epicondyle of humerus
|
Lateral radius
|
Pronate forearm
|
Pronator teres
|
|
Medial epicondyle of humerus
|
Base of second & third metacarpal
|
Flex hand at wrist; abduct hand (radial deviation) |
Flexor carpi radialis
|
|
Medial epicondyle of humerus
|
Multiplex tendon to middle phalanges II-V |
Flexes hand and middle phalanges of fingers II-V |
Flexor digitorum superficialis
|
|
Medial epicondyle of humerus
|
Pisiform & hamate bones & base of fifth metacarpal |
Flex & adduct hand; (ulnar deviation) |
Flexor carpi ulnaris
|
Proximal ulna & interosseous membrane |
Multiplex tendon to distal phalanges II-V |
Flex distal inter-phalangeal joints of fingers II-V |
Flexor digitorum profundus
|
|
Distal anterior ulna
|
Distal anterior radius
|
Pronate forearm (PM)
|
Pronator quadratus
|
|
Lateral supracondylar ridge
|
Base of styloid process of radius
|
Synergist in forearm flexion
|
Brachioradialis
|
|
Lateral supracondylar ridge
|
Base of second metacarpal
|
Extends & abducts hand; (radial deviation) |
Extensor carpi radialis longus |
|
Lateral epicondyle of humerus
|
Base of third metacarpal
|
Extends & abducts hand; (radial deviation) |
Extensor carpi radialis brevis
|
|
Lateral epicondyle of humerus
|
Multiplex tendon to extensor expansions & distal phalanges II-V |
Extend fingers II-V & hand at wrist
|
Extensor digitorum
|
|
Lateral epicondyle of humerus
|
Base of fifth metacarpal
|
Extend & adducts hand
|
Extensor carpi ulnaris
|
|
Subscapular fossa
|
Lesser tubercle of humerus
|
Medially rotates humerus
|
Subscapularis
|
|
Infraspinous fossa
|
Greater tubercle of humerus
|
Laterally rotates humerus
|
Infraspinatus
|
|
Supraspinous fossa
|
Greater tubercle of humerus
|
Initiates abduction of arm
|
Supraspinatus
|
|
Lateral scapula
|
Greater tubercle of humerus
|
Laterally rotates humerus
|
Teres minor
|
