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kinesiology muscles
muscle | origin | insertion | action | nerve |
---|---|---|---|---|
upper trapezius | occipital bone, nuchal ligament | outer third of clavicle, acromion process | scapular elevation and upward rotaiton | spinal accessory (cranial nerve XI) |
middle trapezius | spinal processes of C7 through T3 | scapular spine | scapular retraction | spinal accessory (cranial nerve XI) |
lower trapezius | spinous processes of middle and lower thoracic vertebrae | base of the scapular spine | scapular depression and upward rotation | spinal accessory (cranial nerve XI) |
levator scapula | transverse process of first four cervical vertebrae | vertebral border of scapula between the superior angle and spine | scapular elevation and downward rotation | third and fourth cervical nerves |
rhomboids | spinous processes of C7 through T5 | vertebral border of scapula between the spine and inferior angle | scapular retraction and downward rotation | dorsal scapular nerve |
serratus anterior | lateral surface of the upper eight ribs | vertebral border of the scapula, anterior surface | scapular protraction and upward rotaiotn | long thoracic nerve |
pectoralis minor | anterior surface, third through fifth ribs | coracoid process of the scapuls | scapular depression, protraction, and downward rotation | medial pectoral nerve |
anterior deltoid | lateral third of the clavicle | deltoid tuberosity | shoulder flexion, medial rotation, horizontal ladduction | axillary nerve |
middle deltoid | acromion process | deltoid tuberosity | shoulder abduction | axillary nerve |
posterior deltoid | spine of scapula | deltoid tuberosity | shoulder extension, hyperextension, lateral rotation, horizontal abduction | axillary nerve |
supraspinatus | supraspinous fossa of the scapula | greater tubercle of the humerus | shoulder abduction | suprascapular nerve |
pectoralis major | medial third of clavicle, sternum, costal cartilage of first six ribs | lateral lip of bicipital groove of humerus | shoulder adduction, medial rotaion, horizontal adduction, flexion to approximately first 60 degress, extension to approximately first 120 degres | lateral and medial pectoral nerve |
latissimus dorsi | spinous processes of T7 through L5, posterior surface of sacrum, illiac crest, and lower three ribs | medial lip of bicipital groove of humerus | shoulder extension, adduction, medial rotation, hyperextension | thoracodorsal nerve |
teres major | axillary border of scapula near the inferior angle | crest elow lesser tubercle next to the latissimus dorsi muscle attachment | shoulder extension, adduction, medial rotation | subscapular nerve |
infraspinatus | infraspinous fossa of scapula | greater tubercle of humerus | shoulder lateral rotation, horizontal abduction | suprascapular nerve |
teres minor | axillary border of scapula | greater tubercle of humerus | shoulder lateral rotaion, horizontal abduction | axillary nerve |
subscapularis | subscapular fossa of the scapula | lesser tubercle of the humerus | shoulder medial rotaion | subscapular nerve |
coracobrachailis | coracoid process of the scapula | medial surface of the humerus near midpoint | stabilizes the shoulder joint | musculocutaneous nerve |
brachialis | distal half of humerus, anterior surface | coronoid process and ulnar tuberosity of the ulna | elbow flexion | musculocutaneous nerve |
brachioradialis | lateral supracondylar ridge on the humerus | styloid process of the radius | elbow flexion | radial nerve |
biceps | scapula: long head-supraglenoid tubercle, short head-coracoid process | radial tuberosity of radius | elbow flexion, forearm supination | musculocutaneous nerve |
supinator | lateral epicondyle of humerus and adjacent ulna | anterior surface of proximal radius | forearm supination | radial nerve |
triceps | long head-infraglenoid tubercle of scapuls, lateral head-inferior to greater tubercle on posterhumerus, medial head-posterior surface of humerus | olecranon process of ulna | elbow extension | radial nerve |
pronator teres | medial epicondyle of humerus and coranoid process of ulna | later aspect of radius at its midpoint | forearm pronation, assistive in elbow flexion | median nerve |
pronator quadratus | distal fourth of ulna | distal fourth of radius | forearm pronation | median nerve |
flexor carpi ulnaris | medial epicondyle of humerus | pisiform, and base of fith metacarpal | wrist flexion, ulnar deviation | ulnar nerve |
flexor carpi radialis | medial epicondyle of humerus | base of second and third metacarpals | wrist flexion, radial deviation | median nerve |
palmaris longus | medial epicondyle of humerus | palmar fascia | assistive in wrist flexion | median nerve |
extensor carpi radialis longus | supracondylar ridge of humerus | base of second metacarpal | wrist extension, radial deviation | radial nerve |
extensor carpi radialis brevis | lateral epicondyle of humerus | base of third metacarpal | wrist extension | radial nerve |
extensor carpi ulnaris | lateral epicondyle of humerus | base of fifth metacarpal | wrist extension, ulnar deviation | radial nerve |
flexor digitorum superficialis | common flexor tendon, coronoid process, and radius | sides of the middle phalanx of the four finger | flexes MP and PIP joints of the fingers | median nerve |
flexor digitorum profundus | upper three-fourths of ulna | distal phalanx of the four fingers | flexes all three joints of the fingers | median and ulnar nerves |
extensor digitorum | lateral epicondyle of the humerus | base of distal phalanx of the second through fifth fingers | extends all three joints of the fingers | radial nerve |
extensor digiti minimi | lateral epicondyle of humerus | base of distal phalanx of fifth finger | extends all joints of fifth finger | radial nerve |
extensor indicis | distal ulna | base of distal phalanx of the second finger | extends all joints of the second finger | radial nerve |
flexor digiti minimi | hamate and flexor retinaculum | base of proximal phalanx of the fifth finger | flexes MP of the fifth finger | ulnar nerve |
abductor digiti minimi | pisiform and tendon of flexor carpi ulnaris | proximal phalanx of fifth finger | abducts MP of the fifth finger | ulnar nerve |
opponens digiti minimi | hamate and flexor retinaculum | fifth metacarpal | opposes the fifth finger | ulnar nerve |
palmar interossei | metacarpal | base of the proximal phalanx | adduction of finger | ulnar nerve |
dorsal interossei | two adjacent metacarpals | base of proximal phalanx | abduction of fingers | ulnar nerve |
lumbricales | tendon of the flexor digitorum profundus muscle | tendon of the extensor digitorum muscle | flex the MP joint while extending the IP joints | 1st and 2nd lumbircales-medial nerve, 3rd and 4th lumbricales-ulnar nerve |
flexor pollicis longus | radius, anterior surface | distal phalanx of thumb | flexes all joints of the thumb | median nerve |
abductor pollicis longus | posterior radius, interosseous membrane, middle ulna | base of the first metacarpal | abducts thumgb | radial nerve |
extensor pollicis brevis | posterior distal radius | base of the proximal phalanx of the thumb | extends MP joint of thumb | radial nerve |
extensor pollicis longus | middle opsterior ulna and interosseous membrane | base of distal phalanx of thumb | extends MP and IP joints of the thumb | radial nerve |
flexor pollicis brevis | trapezium and flexor retinaculum | proximal phalanx | flexes MP joint of thumb | median nerve |
abductor pollicis brevis | scaphoid, trapezium and flexor retinaculum | proximal phalanx | abducts the thumb | median nerve |
opponens pollicis | trapezium and flexor retinaculum | first metacarpal | opposes the thumb | median nerve |
adductor pollicis | capitate, base of the second metacarpal, palmar surface of the third metacarpal | base of proximal phalanx of the thumb | adducts thumb | ulnar nerve |