Upper Limb Muscle Chart Flashcards
Pectoralis major
Clavicle, sternum, costal cartilages of upper ribs
Lip of the intertubercular sulcus
Medial and lateral pectoral nn
Adducts/medially rotates arm (also aids in flexion and extension of the humerus)
Pectoralis minor
Ribs near the costal cartilage
Coracoid process
Medial pectoral n
Stabilizes the scapula
Subclavius
First rib
Clavicle
Nerve to the subclavius
Anchors/depresses clavicle
Serratus anterior
Lateral surface of the ribs
Medial border of the scapula
Long thoracic n
Protracts scapula/holds it against the thoracic wall
Deltoid
Clavicle, acromion, spine of the scapula
Deltoid tuberosity
Axillary n
Anterior fibers- flex/medially rotate arm
Middle fibers- abducts
Posterior fibers- extend/laterally rotate arm
Infraspinatus
Infraspinous fossa
Greater tubercle of humerus
Suprascapular n
Laterally rotates the arm
Supraspinatus
Supraspinatus fossa
Greater tubercle of the humerus
Suprascapular n
Initiates arm abduction for deltoid
Teres minor
Lateral border of the scapula
Greater tubercle of humerus
Axillary nerve
Laterally rotates the arm
Teres major
Inferior angle of scapula
Lip of intertubercular sulcus
Lower subscapular n
Adducts/medially rotates the arm
Subscapularis
Subscapular fossa
Lesser tubercle of humerus
Upper and lower subscapular nn
Medially rotates the arm
Biceps brachii
Short head- coracoid process Long head- Supra glenoid tubercle Radial tuberosity and bicipital aponeurosis Musculocutaneous nerve Flexes and supinate the forearm
Coracobrachialis
Coracoid process
Midshaft of humerus
Musculocutaneous n
Weakly flexes and adducts the arm
Brachialis
Distal humeral shaft
Coronoid process of ulna
Musculocutaneous (small contribution from radial n)
Flexes forearm
Triceps brachii
Long head- infraglenoid tubercle Lateral and medial heads: shaft of humerus Olecranon process Radial n Extends forearm
Anconeus
Lateral epicondyle
Proximal ulna
Radial n
Weakly extends forearm
Pronator teres
Coronoid process and medial condyle
Radial shaft
Median n
Pronates/flexes forearm
Palmaris longus
Medial epicondyle of humerus
Flexor retinaculum and palmar aponeurosis
Median n
Flexes hand/tenses palmar aponeurosis
Flexor carpi radialis
Medial epicondyle
2nd metacarpal
Median n
Flexes/abducts hand
Flexor carpi ulnaris
Medial epicondyle of humerus and olecranon process
Pisiform, hook of hamate, 5th metacarpal
Ulnar n*
Flexes/adducts hand
Flexor digitorum superficialis
Medial epicondyle and proximal radius
Middle phalanges of digits 2-5
Median n
Flexes PIP and MP digits of 2-5
Flexor digitorum profundus
Proximal and middle ulna
Distal phalanges digits 2-5
Ulnar n (medial half); median n (lateral half)
Flexed DIP of digits 2-5
Flexor pollicis longus
Radial shaft
Distal phalanx of thumb
Median n
Flexes thumb
Pronator quadratus
Distal ulna
Distal radius
Median n
Pronates forearm
Brachioradialis
Supraepicondylar ridge of humerus
Distal radius
Radial n
Flexes forearm
Extensor carpi radialis longus
Lateral supraepicondylar ridge of humerus
2nd metacarpal
Radial n
Extends/abducts hand
Extensor carpi radialis brevis
Lateral epicondyle
3rd metacarpal
Radial n
Extends/abducts hand
Extensor digitorum
Lateral epicondyle of humerus
Extensor expansion of digits 2-5
Radial n
Extends MP and IP joints of 2-5
Extensor digiti minimi
Lateral epicondyle of humerus
Extensor expansion of digit 5
Radial n
Extends MP and IP joint of digit 5
Extensor carpi ulnaris
Lateral epicondyle of humerus and proximal ulna
5th metacarpal
Radial n
Extends/adducts hand
Supinator
Lateral epicondyle of humerus
Proximal radius
Radial n
Supinates forearm
Extensor indicis
Distal ulna
Extensor expansion of digit 2
Radial n
Extends digit 2
Abductor pollicis longus
Proximal ulna and radius
1st metacarpal
Radial nerve
Abducts thumb
Extensor pollicis longus
Midshaft of ulna
Distal phalanx of thumb
Radial n
Extends thumb
Extensor pollicis brevis
Distal radius
Proximal phalanx of thumb
Radial nerve
Extends thumb
Opponens pollicis
Flexor retinaculum and carpal bones
1st metacarpal
Recurrent branch of the median n
Opposes thumb
Abductor pollicis brevis
Flexor retinaculum and carpal bones
Proximal phalanx of thumb
Recurrent branch of the median n
Abducts thumb
Flexor pollicis brevis
Flexor retinaculum and carpal bones
Proximal phalanx of thumb
Recurrent branch of median n
Flexes thumb
Adductor pollicis
Oblique head- 2nd and 3rd metacarpal and adj carpal bones Transverse head- 3rd metacarpal Proximal phalanx of thumb Ulnar n Adducts thumb
Abductor digiti minimi
Pisiform
Proximal phalanx of 5th digit
Ulnar n
Abducts 5th digit
Flexor digiti minimi
Hook of hamate
Proximal phalanx of 5th digit
Ulnar n
Flexes 5th digit
Opponens digiti minimi
Hook of hamate
5th metacarpal
Ulnar n
Opposes 5th digit
Lumbricals 1+2
Lateral 2 tendons of the FDP
Extensor expansions of digits 2+3
Median
Flexes MP joint, extends IP joint
Lumbricals 3+4
Median 3 tendons of FDP
Extensor expansion of digits 4+5
Ulnar n
Flex MP, extends IP
Dorsal interossei (4)
Adjacent sides of metacarpals
Proximal phalanges and extensor expansions
Ulnar n
Abducts digits 2-4, assists lumbricals
Palmar interossei (3)
Palmar surface of metacarpals 2,4 and 5
Proximal phalanges and extensor expansions
Ulnar n
Adducts digits 2,4 and 5; assists lumbricals
