1.7 Ventral Forearm

Question 1

superficial forearm muscles all attach to what through a common flexor tendon? all cross what joint?

Answer 1

medial epicondyle, elbow joint

Question 2

• forms medial boundary of cubital fossa
• innervated by median nerve
• origin: humeral and ulnar head
• inserts: lateral surface of radius

Answer 2

pronator teres

Question 3

• origin: medial epicondyle
• insertion: 2nd metacarpal
• innervated by median nerve

Answer 3

flexor carpi radialis

Question 4

• tendon attaches to palmar aponeurosis
• test by opposing thumb and pinky
• absent in 16% of caucasians
• function: retract claws/nails

Answer 4

palmaris longus

Question 5

• origin: medial epicondyle
• inserts onto pisiform, hook of hamate, base of 5th metacarpal bone
• innervated by ulnar nerve

Answer 5

flexor carpi ulnaris

Question 6

• origin: humeral, ulnar, and radial head
• inserts: body of mid phalanges
• flexes the proximal interphalangeal joint
• innervated by median nerve

Answer 6

flexor digitorum superficialis

Question 7

• origin: ulna and interosseus membrane
• tendons deep to FDS, insert onto base of distal phalanges
• flex distal interphalangeal joint
• median nerve serves 2 and 3 digits, ulnar nerve serves 4 and 5 digits

Answer 7

flexor digitorum profundus

Question 8

origin: anterior radius, interosseus membrane
insertion: base of distal phalanx
- innervated by median nerve
- flexes the thumb

Answer 8

flexor pollicis longus

Question 9

• deepest muscle in anterior forearm, covers distal 1/4th of radius and ulna
• pronates the forearm

Answer 9

pronator quadratus

Question 10

-travels with brachial artery to enter forearm, go on in middle forearm in between FDS and FDP

Answer 10

median nerve

Question 11

-branch of median nerve, branches out distal cubital fossa

Answer 11

anterior interosseus nerve

Question 12

arises proximal to flexor retinaculum, supplies skin of lateral palm

Answer 12

palmar cutaneous branch of median nerve

Question 13

branches distal to flexor retinaculum, supplies 3 thenar muscles

Answer 13

recurrent branch of median nerve in forearm and hand

Question 14

median nerve injury, compressed between two heads of pronator teres muscle, pope’s hand when forming fist

Answer 14

pronator syndrome

Question 15

passes posterior to medial epicondyle of humerus, in between epicondyle and olecranon, enters hand through canal of Guyon

Answer 15

ulnar nerve

Question 16

supplies flexor carpi ulnaris and medial half (digit 4 and 5) of FDP

Answer 16

ulnar nerve

Question 17

• numb and tingling of medial part of palm and digits 4 and 5
• reduced adduction of fingers
• clawhand
• caused by direct hit of funny bone or bicyclers who hold handle bar too tight

Answer 17

ulnar nerve injury

Question 18

ulnar nerve compressed by flexor carpi ulnaris

Answer 18

cubital tunnel syndrome

Question 19

continuation of ulnar artery, anastamoses with radial artery

Answer 19

superficial palmar arch

Question 20

passes deeply, anastamoses with radial artery

Answer 20

deep palmar arch

Question 21

demarcates flexors and extensors of the forearm, runs across anatomical snuffbox into hand, forms arterial palmar arches

Answer 21

radial artery

Question 22

supplies brachioradialis and brachialis,

Answer 22

radial recurrent artery

Question 23

medial epicondylitis

Answer 23

golfer elbow