Upper Extremity Muscles

Question 1

Deltoid - Anterior

Answer 1

O-anterior, lateral 1/3 clavicle
I-deltoid tuberosity
A-flexion, inversion

Question 2

Deltoid - Middle

Answer 2

O-lateral aspect of acromion
I-deltoid tuberosity
A-abduction beyond 15 degrees

Question 3

Deltoid - Posterior

Answer 3

O-Inferior edge of spine of scapula
I-Deltoid tuberosity
A-extension, eversion

Question 4

Latissimus Dorsi

Answer 4

O-inf angle of scapula, spinous process of T6-12, last 4 ribs,
thoracolumbar aponeurosis and posterior iliac crest
I-intertubercular groove of humerus
A-extension, adduction, inversion

Question 5

Teres Major

Answer 5

O-inferior angle and lower 1/3 of lateral border of scapula
I-crest of lesser tubercle/intertubercular groove of humerus
A- extension, adduction, inversion

Question 6

Teres Minor

Answer 6

O-upper 2/3 of lateral border of scapula
I-greater tubercle of humerus
A-eversion at abduction, stability

Question 7

Supraspinatus

Answer 7

O-Supraspinatus fossa
I-greater tubercle of humerus
A-abduction 15 degrees or more, stability

Question 8

Infraspinatus

Answer 8

O-infraspinatus fossa
I-greater tubercle
A-eversion, stability

Question 9

Subscapularis

Answer 9

O-subscapular fossa
I-Lesser tubercle
A-medially rotate, stability

Question 10

Pectoralis Major

Answer 10

O-medial half of clavicle, sternum, cartilage of 1-6 ribs
I-crest of the greater tubercle
A-adduction, flexion, inversion

Question 11

Pectoralis Minor

Answer 11

O: anterior surface ribs 3-5
I: coracoid process
A-protraction, depression

Question 12

Coracobrachialis

Answer 12

O-Coracoid process of the scapula
I-medial surface of mid humeral shaft
A-flexion, inversion, adduction

Question 13

Serratus Anterior

Answer 13

O: Surface of upper 9 lateral ribs
I: Ant/Medial border scapula
A-protraction of scapula (boxing)

Question 14

Trapezius Upper

Answer 14

O-base of skull, occipital protuberance
I-posterior and lateral 1/3 of clavicle
A-Head extension/CL
rotation Elevation of
scap and upward rotation

Question 15

Trapezius Middle

Answer 15

O-Spinous process of C7 and T1-3 vert
I-medial acromion process and superior border of scapular spine
A-scapular retraction

Question 16

Trapezius Lower

Answer 16

O-T4-12 spinous process
I-triangular space at base of scapular spine
A-depression and retraction of scapula

Question 17

Rhomboids

Answer 17

O-Spinous process of C7-T5
I-whole length of medial border of scapula
A-Retract scapula,
downward rotation of
scapula

Question 18

Levator Scapulae

Answer 18

O-C1-4 transverse process
I-Medial border of scapula, between superior angle and spine of scapula
A-elevate scapulae

Question 19

Brachialis

Answer 19

O-distal half of anterior humerus
I-coronoid process of the ulna
A-elbow flexion

Question 20

Bicep Brachii - Short head

Answer 20

O-Coracoid process, upper glenoid fossa
I-Radial tuberosity, bicipital aponeurosis
A-Flexion,
supination
@ elbow,
flexion
shoulder

Question 21

Bicep Brachii - Long head

Answer 21

O-supraglenoid tubercle
I-Radial tuberosity
A-???

Question 22

Triceps Brachii - Long head

Answer 22

O-infraglenoid tubercle
I-olecranon process
A-shoulder and elbow extension

Question 23

Triceps Brachii - Medial/Lateral head

Answer 23

O-posterior humerus
I-olecranon process of ulna
A-???

Question 24

Brachioradialis

Answer 24

O-proximal 2/3 of lateral supracondylar ridge of humerus
I-Styloid process of radius
A-forearm flexion when pronated

Question 25

Wrist Flexors

Answer 25

A-flex wrist, weak elbow flexors

Question 26

Wrist Extensors

Answer 26

A-extend wrist, weak elbow extensors

Question 27

Ext Carpi Radialis Long & Brev

Answer 27

OL-distal 1/3 of lateral supracondylar ridge of humerus OB-lateral epicondyle of humerus IL-base of 2nd metacarpal IB-Base of 3rd metacarpal A-wrist extension, radial deviation

Question 28

Ext Carpi Ulnaris

Answer 28

O: lateral epicondyle I: Base of 5th MC A- wrist extension, radial deviation

Question 29

Extensor Digitorum

Answer 29

O-lateral epicondyle I-base of middle and distal phalanges of 2-5 A- extension of 2-5 phalanges

Question 30

Anconeus

Answer 30

O-Lateral epicondyle I-olecranon process, post and prox ulna A- elbow terminal extension

Question 31

Flexor Carpi Radialis

Answer 31

O-medial epicondyle I-base of 2nd and 3rd metacarpals, palmar A-flex wrist, radial deviation

Question 32

Palmaris Longus

Answer 32

O-medial epicondyle I-flexor retinaculum and palmar aponeurosis A- wrist flexion, opposition

Question 33

Flexor Carpi Ulnaris

Answer 33

O-medial epicondyle, post, prox ulna I-pisiform, hook of hamate, base of 5th metacarpal A- flex wrist, ulnar deviation

Question 34

Flexor Digitorum Superficialis

Answer 34

O-medial epicondyle -medial coronoid process on ulna -radial head and upper 2/3 anterior border of radius, distal to radial tuberosity I-middle phalanx of 2-5 on palmar A- Flex PIP

Question 35

Flexor Digitorum Profundus

Answer 35

O-ant and medial surface of prox ¾ of ulna I-Base of distal phalanges, 2-5, palmar A-flex DIP

Question 36

Pronator Teres

Answer 36

O- medial epicondyle I-middle of lateral surface of radius A-pronation

Question 37

Anatomic Snuff Box

Answer 37

???

Question 38

Extensor Pollicis Longus

Answer 38

O-post ulna I-base of distal phalanx of thumb A-extend IP

Question 39

Extensor Pollicis Brevis

Answer 39

O-post surface of radius I-base of proximal phalanx of thumb A- extend MCP

Question 40

Abductor Pollicis Longus

Answer 40

O-post surface of radius and ulna I-base of 1st metacarpal A-abduct thumb

Question 41

Sternocleidomastoid

Answer 41

O- Sternal head: Top of manubrium Clavicular head: Medial one-third of the clavicle I-Mastoid process of temporal bone and the lateral portion of superior nuchal line of occiput A-Laterally flex the head and neck to the same side (ipsilateral flexion) Rotate the head and neck to the opposite side (neck contralateral rotation) Flex the neck Assist to elevate the rib cage during inhalation

Question 42

Scalenes Anterior

Answer 42

O-ANTERIOR Transverse processes of C3-C6 (anterior tubercles) I- First rib (superior border) A- laterally flex the head and neck to the same side (unilateral, all) Rotate head and neck to the opposite side (contralateral, all) Elevate the ribs during inhalation (all) Flex the head and neck (anterior)

Question 43

Scalenes Middle

Answer 43

O-MIDDLE Transverse processes C2- C7 (posterior tubercles) I-First rib (superior border) A-same as above

Question 44

Scalenes Posterior

Answer 44

O-POSTERIOR Transverse processes C6- C7 (posterior tubercles) I-Second rib (external surface A-same as above