Arm

Question 1

What muscles flex the elbow (3)

Answer 1

• biceps brachii
• brachialis
• brachioradialis

Question 2

Biceps brachii

Answer 2

o = supraglenoid tubercle (long head), coracoid process (short head)
i = radial tuberosity
a = elbow/shoulder flexion
n = musculocutaneous

Question 3

Brachialis

Answer 3

o = anterior shaft, humerus
i = ulna
a = flex elbow
n = musculocutaneous

Question 4

Brachioradialis

Answer 4

o = supracondylar ridge (distal, lateral humerus)
i = radial tubercle
a = elbow flexion, pronation
n = radial

Question 5

What muscle extends the elbow

Answer 5

triceps

Question 6

Triceps brachii

Answer 6

o = infraglenoid tubercle (long), lateral shaft (lateral), posterior shaft (short)
i = olecranon process
a = elbow extension
n = radial

Question 7

What are the wrist flexors/pronators (4)

Answer 7

• pronator teres
• flexor carpi radialis
• palmaris longus
• flexor carpi ulnaris

Question 8

pronator teres

Answer 8

o = medial epicondyle
i = radius
a = pronate forarm
n = median

Question 9

flexor carpi radialis

Answer 9

o = medial epicondyle, humerus
i = base of 2nd + 3rd metacarpals
a = flex wrist
n = median

Question 10

flexor carpi ulnaris

Answer 10

o = medial epicondyle
i = pisiform, hamate, base of 5th metacarpal
a = flex wrist
n = ulnar

Question 11

Palmaris longus

Answer 11

o = medial epicondyle
i = palmar fasciae
a = flex wrist
n = median

Question 12

What muscles extend the wrist (3)

Answer 12

• extensor carpi radialis longus
• extensor carpi radialis brevis
• extensor carpi ulnaris

Question 13

Extensor carpi radialis longus

Answer 13

o = lateral epicondyle
i = 2nd metacarpal
n = radial

Question 14

extensor carpi radialis brevis

Answer 14

o = lateral epicondyle
i = 3rd metacarpal
n = radial

Question 15

extensor carpi ulnaris

Answer 15

o = lateral epicondyle
i = 3rd metacarpal
n = radial

Question 16

what are the finger + thumb extensors / abductors (4)

Answer 16

• extensor digitorum
• abductor pollucis longus
• extensor pollucis brevis
• extensor pollucis longus

Question 17

extensor digitorum

Answer 17

o = lateral epicondyle
i = extensor expansions, 4 fingers
n = radial

Question 18

Abductor pollucis longus

Answer 18

o = ulna + radius
i = 1st metacarpal
n = radial

Question 19

Extensor pollucis brevis

Answer 19

o = radius
i = proximal phalanx of thumb
n = radial

Question 20

extensor pollucis longus

Answer 20

o = ulna
i = distal phalanx of thumb
n = radial

Question 21

What muscles flex the fingers (3)

Answer 21

• flexor digitorum superficialis
• flexor digitorum profundus
• flexor pollucis longus

Question 22

flexor digitorum superficialis

Answer 22

o = medial epicondyle
i = middle phalanges 2-5
n = median

Question 23

flexor digitorum profundus

Answer 23

o = anterior ulna, interosseus membrane
i = distal phalanges digits 2-5
n = median + ulnar

Question 24

flexor pollucis longus

Answer 24

o = anterior radius, interosseus membrane
i = distal phalanx, thumb
n = median

Question 25

what muscles originate from the medial epicondyle

Answer 25

• pronator teres
• flexor carpi radialis
• palmaris longus
• flexor carpi ulnaris
• flexor digitorum superficialis

Question 26

what muscles originate from the lateral epicondyle

Answer 26

• extensor carpi radialis longus
  -extensor carpi radialis brevis
• extensor carpi ulnaris

Question 27

what intrinsic hand muscles adduct the fingers

Answer 27

palmar interossei

Question 28

what intrinsic muscles abduct the fingers

Answer 28

dorsal interossei

Question 29

lumbricals

Answer 29

o = flexor digitorum profundus tendons
i = extensor digitorum tendons
a = flex MCP + extend IP joints
n = ulnar + median

Question 30

interossei

Answer 30

o = metacarpals
i = proximal phalanges + extensor tendons
a = adduction/abduction
n = ulnar

Question 31

hypothenar muscles include

Answer 31

• abductor digiti minimi
• flexor digiti minimi
• opponens digiti minimi