Forearm

Question 1

Muscles of superficial anterior forearm

Answer 1

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

Question 2

flexor carpi ulnaris

Answer 2

origin: medial epicondyle, olecranon
insertion: pisiform, hamate, 5th metacarpal
innervation: ulnar
action: wrist flexion, ulnar deviation

Question 3

palmaris longus

Answer 3

origin: medial epicondyle
insertion: palmar aponeurosis, flexor retinaculum
innervation: median
action: flex wrist, tense palmar aponeurosis

Question 4

flexor carpi radialis

Answer 4

origin: medial epicondyle
insertion: base of metacarpal 2 and 3
innervation: median
action: flex wrist, radial deviation

Question 5

pronator teres

Answer 5

origin: medial epicondyle, coronoid process
insertion: mid shaft radius
innervation: median
action: pronate

Question 6

flexor digitorum superficialis

Answer 6

origin: medial epicondyle, coronoid process, oblique line of radius
insertion: middle phalanges 2-5
innervation: median
action: flex PIP, wrist

Question 7

flexor digitorum profundus

Answer 7

origin: anterior/medial ulna and IOM
insertion: distal phalanx 2-5
innervation: 2-3 median (interosseous), 4-5 ulnar
action: flex DIP

Question 8

flexor pollicis longus

Answer 8

origin: anterior radius and IOM
insertion: base of distal phalanx 1
innervation: median
action: flex DIP 1pro

Question 9

pronator quadratus

Answer 9

origin: distal ulna
insertion: distal radius
innervation: anterior interosseous of median
action: pronate

Question 10

brachioradialis

Answer 10

origin: lateral supraepicondylar ridge
insertion: styloid process of radius
innervation: radial
action: flex elbow

Question 11

extensor carpi radialis longus

Answer 11

origin: lateral supraepicondylar ridge
insertion: base of metacarpal 2
innervation: radial
action: extend and abduct wrist

Question 12

extensor carpi radialis brevis

Answer 12

origin: lateral epicondyle
insertion: base of metacarpal 3
innervation: deep branch of radial nerve
action: extend and abduct wrist

Question 13

extensor digitorum

Answer 13

origin: lateral epicondyle
insertion: extensor hoods, base of middle phalanges of 2-5
innervation: posterior interosseous
action: extend 2-5 digits

Question 14

extensor digiti minimi

Answer 14

origin: lateral epicondyle
insertion: dorsal digital expansion digit 5
innervation: posterior interosseous
action: extend digit 5

Question 15

extensor carpi ulnaris

Answer 15

origin: lateral epicondyle, posterior ulna
insertion: tubercle, base of medial metacarpal 5
innervation: posterior interosseous
action: extend and adduct wrist

Question 16

anconeus

Answer 16

origin: lateral epicondyle
insertion: olecranon process, proximal posterior ulna
innervation: radial n
action: abduction ulna in pronation and accessory extension at elbow
keeps the palm at midline when pronating

Question 17

supinator

Answer 17

origin: lateral epicondyle, superior crest of ulna
insertion: lateral radius, above ant oblique line
innervation: posterior interosseous
action: supination

Question 18

abductor pollicis longus

Answer 18

origin: posterior ulna and radius, and IOM
insertion: lateral base metacarpal 1
innervation: posterior interosseous nerve
action: abduct CMC digit 1

Question 19

extensor pollicis brevis

Answer 19

origin: posterior radius and IOM
insertion: dorsal base of proximal digit 1
innervation: posterior interosseous
action: extend CMC and MP joints of digit 1

Question 20

extensor pollicis longus

Answer 20

origin: posterior ulna and IOM
insertion: dorsal at base of distal digit 1 phalanx
innervation: posterior interosseous
action: extend thumb, abduct wrist

Question 21

extensor indicis

Answer 21

origin: posterior surface ulna, IOM
insertion: extensor hood, index finger
innervation: posterior interosseous
action: extend wrist and second digit joints