Shoulder, Arm, and Hand Flashcards
Deltoid
O: clavicle, acromion, and spine of scapula
I: tuberosity of humerus
N: axillary nerve (C5-C6)
A: flexs/IR, abduction, and extends/ER arm
Subscapularis
O: subscapular fossa (anterior side of scapula)
I: lesser tubercle of humerus
N: subscapular (C5-7)
A: adducts/IR arm
Supraspinatus
O: supraspinous fossa of scapula
I: superior facet of greater tubercle of humerus
N: suprascapular (C5-7)
A: initial abduction
Infraspinatus
O: infraspinous fossa of scapula
I: middle facet of greater tubercle of humerus
N: suprascapular nerve (C5-7)
A: ER of arm
Teres Minor
O: lateral border of scapula
I: inferior facet of greater tubercle of humerus
N: axillary nerve (C5-6)
A: ER of arm
Teres Major
O: dorsal surface of inferior angle of scapula
I: intertubercular groove of humerus
N: subscapular nerve (C5-7)
A: adducts and IR arm
Biceps Brachii
O: coracoid process/ supraglenoid tubercle
I: tuberosity of radius
N: musculocutaneous (C5-7)
A: flexes elbow (that is supinated), supination, weak shoulder flexor
Brachialis
O: distal part of anterior surface of humerus
I: cornoid process and tuberostiy of ulna
N: musculocutaneous nerve (C5-7)
A: flexes forearm in ALL positions
Coracobrachialis
O: tip of coracoid process
I: medial surface of humerus
N: musculocutaneous nerve (C5-7)
A: flexion/adduction of arm
Triceps Brachii
O: infraglenoid tubercle, posterior surface of humerus (superior and inferior to radial groove)
I: olecranon
N: radial nerve (C5-T1)
A: extends forearm
Anconeus
N: radial nerve (C5-T1)
A: assists triceps in extending forearm
Pronator Teres
O: medial epicondyle/ ulnar coronoid process
I: middle of radius
N: median nerve (C6-T1)
A: pronation
Flexor Carpi Radialis
O: medial epicondyle
I: base of 2nd metacarpal bone
N: median nerve (C6-T1)
A: flexes and abducts it (radial deviation)
Palmaris Longus
O: medial epicondyle
I: flexor retinaculum/ palmar aponeurosis
N: median nerve (C6-T1)
A: flexes wrist/ tightens palmar aponeurosis
Flexor Carpi Ulnaris
O: medial epicondyle / olecranon
I: pisiform, hanmate and 5th metacarpal bone
N: ulnar nerve (C7-T1)
A: flexes wrist and adducts (ulnar deviation)
Flexor Digitorum Superficialis
O: medial epicondyle/ anterior border of radius
I: middle phalanges of medial 4 digits (medial and lateral sides)
N: medial nerve (C6-T1)
A: flexes middle phalanges; can flex proximal phalanges at MCP joint
Flexor Digitorum Profundus
O: medial and anterior surface of ulna
I: bases of distal phalanges of medial 4 digits
N: 4-5 = ulnar; 2-3 = median
A: flexes distal phalanges; flexes PIPs and MCPs/wrist
Flexor Pollicis Longus
O: anterior surface of radius
I: base of distal phalanx of thumb
N: anterior interosseous nerve (median nerve)
A: flexes phalanges of thumb (MCP and IP)
Pronator Quadratus
O: distal part of anterior surface of ulna
I: anterior surface of radius
N: anterior interosseous (median nerve)
A: pronates forearm
Brachioradialis
O: supracondylar ridge of humerus
I: lateral surface of distal end of radius
N: radial nerve (C5-T1)
A: flexes forearm
Extensor Carpi Radialis Longus
O: lateral supracondylar ridge of humerus/ lateral epicondyle
I: base of 2nd metacarpal bone
N: radial nerve (C5-T1)
A: extend and abduct hand (radial deviation)
Extensor Carpi Radialis Brevis
O: lateral epicondyle
I: base of 3rd metacarpal bone
N: deep branch of radial (C7-C8)
A: extend and abduct (radial deviation)
Supinator
O: lateral epicondyle
I: lateral/post/ant surface of radius
N: deep branch of radial (C7-C8)
A: supinates
Extensor Carpi Ulnaris
O: lateral epicondyle/ posterior ulna
I: base of 5th metacarpal
N: posterior interosseous (radial nerve) C7-C8
A: extends and adducts (ulnar deviation)
Extensor Digitorum
O: lateral epicondyle
I: median slip to PIP and 2 lateral slips to DIP
N: posterior interosseous (radial nerve) C7-8
A: extends at MCP and wrist
Extensor Digiti Minimi
O: lateral epicondyle
I: 5th digit
N: posterior interosseous
A: extends 5th digit at MCP and PIP
Extensor Indicis
O: posterior surface of ulna
I: 2nd digit
N: posterior interosseous nerve (C7-8)
A: extends 2nd digit
Abductor Pollicis Longus
O: posterior surface of ulna/radius
I: base of 1st metacarpal bone
N: posterior interosseous
A: abducts thumb and wrist
Extensor Pollicis Longus
O: posterior surface of ulna (distal to abductor pollicis longus)
I: base of distal phalanx of thumb
N: posterior interosseous
A: extends distal phalanx of thumb at MCP and IP joints
Extensor Pollicis Brevis
O: posterior surface of radius
I: base of proximal phalanx of thumb
N: posterior interosseous
A: extends proximal phalanx of thumb
Abductor Pollicis Brevis
O: tubercles of scaphoid and trapezium bones
I: radial side of base of proximal phalanx of thumb
N: recurrent brance of median N (C8-T1)
A: abducts thumb and opposition
Flexor Pollicis Brevis
O: tubercle of trapezium; trapezoid, capitate
I: radial side of base of proximal phalanx of thumb
N: recurrent branch of median N and ulnar nerve
A: flexes thumb at proximal phalanx
Opponens Pollicis
O: tubercle of trapezium bone
I: radial side of 1st metacarpal bone
N: recurrent branch of median N
A: opposes thumb, IR thumb
Adductor Pollicis
O: base of 2nd/3rd metacarpals, capitate and adjacent carpal bones
I: ulnar side of base of proximal phalanx of thumb
N: deep branch of ulnar nerve
A: adducts thumb, opposition, flexes thumb at MCP
Abductor Digiti Minimi
O: pisiform bone
I: medial side of base of proximal phalanx of 5th finger
N: deep branch of ulnar
A: abducts 5th digit
Flexor Digiti Minimi Brevis
O: hook of hanmate
I: medial side of base of proximal phalanx of 5th digit
N: deep branch of ulnar
A: flexes proximal phalanx of 5th digit (MCP joint)
Opponens Digiti Minimi
O: hook of hanmate
I: medial border of 5th metacarpal
N: deep branch of ulnar
A: opposition
Lumbricals
O: tendons of flexor digitorum profundus
I: lateral sides of extensor expansions of digits 2-5
N: 2-3 = median; 4-5= ulnar
A: flexes MCP and extends IP joints
Dorsal Interossei
ABDUCTS (digits 2,3 4)
Palmar Interossei
ADDUCTS (digits 2,4 5)
