EXNS 2210: OIA - Upper Extremities

O of subclavius

1st rib

I of subclavius

Clavicle

A of subclavius

Depresses clavicle, moves clavicle anteriorly, stabilizes pectoral girdle

O of serratus anterior

Ribs 1-9

I of serratus anterior

Scapula: costal surface of medial border

A of serratus anterior

• AB scapula + upward rotation

• Stabilizes scapula

• RMA: Elevates ribs when scapula is stabilized

O of trapezius

occipital bone: external protuberance, nuchal ligament, c2-t2

I of trapezius

Clavicle, acromion, scapula

A of superior trapezius

elevation, EXT head, laterally flex head and neck

A of middle trapezius

Retraction

A of inferior trapezius

Depress

A of inferior and superior trapezius

Upwardly rotate scapula

O of levator scapulae

Transverse processes of C1-C4

I of levator scapulae

Superior angle and medial border of scapula

A of levator scapulae

Elevate scapula

O of rhomboid major

t2-t5 spinous process

I of rhomboid major

Vertebral border of scapula inferior to the spine

A of rhomboid major

• elevates

• retraction

• downward rotation

• stabilizes scapula

O of rhomboid minor

Spines of 7th cervical and 1st throacic vertebrae

I of rhomboid minor

Vertebral border of scapula inferior to the spine

A of rhomboid minor

• elevates

• Retraction

• Downward rotation

  • Stabilizes scapula

o of pectoralis major

clavicle, sternum, and costal cartilages of 1-6

i of perctoralis major

biciptal groove

A of pectoralis major

• both AD and IR

• EXT The shoulder from a flexed position

• FLEX the shoulder from extended position

O of latissimus dorsi

• t7-t12: spinous process

• Iliac crest

• ribs 9-12

I of latissimus dorsi

bicipital groove (interbuercular groove)

A of latissimus dorsi

• EXT shoulder

• AD shoulder

• IR

O of supraspinatus

Supraspinous fossa

I of supraspinatus

Greater tubercle

A of supraspinatus

• Initiates AB

• Stabilizing of head of humerus

O of infraspinatus

Infraspinous fossa

I of infraspinatus

Greater tubercle

A of infraspinatus

• ER

• Stabilization of head of humerus

O of teres minor

Scapula: Lateral border

I of teres minor

Greater tubercle

A of teres minor

• ER

• Assist with AD and EXT

• Stabilization of head of humerus

O of subscapularis

Subscapular fossa

I of subscapularis

Lesser tubercle

A of subscapularis

IR (MR)

O of deltoid

• Anterior → lateral 3 of clavicle

• Middle → acromion

• Posterior → spine of scapula

I of deltoid

Deltoid tuberosity

A of deltoid

• Anterior: Flex, AB, H, AD, IR

• Middle: AB

• POsterior: Ext. AD, H, AB, ER

O of teres major

Inferior angle of scapula

I of teres major

Bicipital groove

A of teres major

• EXT of shoulder

• Assists AD & IR

O of coracobrachialis

Coracoid process

I of coracobrachialis

Middle of medial shaft of humerus

A of coracobrachialis

• FLEX of shoulder

• AD of shoulder

O of biceps brachii

• Long head: tubercle above glenoid fossa

• Short head = coracoid process

I of biceps brachii

Radial tuberosity

A of biceps brachii

• FLEX of the elbow

• FLEX of the shoulder

• Supination of forearm

O of brachialis

Distal and anterior surface of humerus

I of brachialis

Ulna: ulnar tuberosity and coronoid process

A of brachialis

FLEX the elbow

O of brachioradilias

Lateral border of distal humerus

I of brachioradialis

Superior to styloid process of radius

A of brachioradialis

FLEX the elbow

O of triceps brachii

• long head: infraglenoid tubercle

• Lateral head: later and posterior surface of humerus

• Medial head: entire posterior surface of humerus

I of triceps brachii

Olecranon

A of triceps brachii

• EXT of elbow

• EXT of shoulder

• AD of shoulder

O of pronator teres

Medial epicondyle and coronoid process

I of pronator teres

Radius

A of pronator teres

• Pronates forearm (during rapid or forced pronation)

• Assist w/ FLEX of the elbow

O of supinator

• Lateral epicondyle

• Ulna

I of supinator

Lateral surface of radius

A of supinator

Supination

O of flexor carpi radialis

Common flexor tendon (medial epicondyle)

I of flexor capri radialis

2nd and 3rd metacarpals

A of flexor carpi radialis

• FLEX the wrist

• Radially deviates the wrist

• Assist with elbow FLEX

O of flexor carpi ulnaris

Common flexor tendon (medial epicondyle)

I of flexor carpi ulnaris

• pisiform

• hamate

• base of the 5th

A of the flexor carpi ulnaris

• FLEX the wrist

• Ulnar deviation of the wrist

• Assists with elbow FLEX

O of palmaris longus

Medial epicondyle

I of palmaris longus

Flexor retinaculum and palmar aponeurosis

A of palmaris longus

FLEX the wrist

O of flexor digitorum superficialis

Common flexor tendon (medial epicondyle)

I of flexor digitorum superificialis

Middle phalanx of 2-5

A of flexor digitorum superficialis

FLEX fingers 2-5

O of flexor digitorum profundus

Anterior medial surface of ulna

I of flexor digitorum profundus

Base of distal phalanx of each finger

A of flexor digitorum profundus

FLEX the wrist and fingers 2-5

O of flexor pollicis longus

Anterior radius and interosseous membrane

I of flexor pollicis longus

Base of distal phalanx of thumb

A of flexor pollicis longus

FLEX of distal phalanx of thumb

O of extensor carpi radialis longus

Lateral supracondylar ridge of humerus

I of extensor carpi radialis longus

2nd metacarpal

A of extensor capri radialis longus

• Wrist EXT

• Radial deviation

O of extensor carpi radialis brevis

Common extensor tendon (lateral epicondyle)

I of extensor capri radialis brevis

3rd meta carpal

A of extensor carpi radialis brevis

• Wrist EXT

• Radial deviation

O of extensor digitorum

Common extensor tendon (lateral epicondyle)

I of extensor digitorum

Fingers 2-5

A of extensor digitorum

EXT wrist and fingers 2-5

O of extensor digiti minimi

Common extensor tendon (lateral epicondyle)

I of extensor digiti minimi

Little finger

A of extensor digiti minimi

EXT of little finger

O of extensor carpi ulanris

Common extensor tendon (lateral epicondyle)

I of extensor carpi ulnrais

Base of the 5th metacarpal

A of extensor carpi ulanris

EXT and UD of wrist

O of extensor pollicis brevis

radius and interosseous