Anterior Forearm

Question 1

Deep fascia

Answer 1

Dense connective tissue
Blends with periosteum
Deep to superficial fascia

Question 2

Investing fascia

Answer 2

Extension of deep fascia surrounding individual muscles

Question 3

Inermuscular fascia

Answer 3

Connects deep fascia to bones
Divides limb into fascial compartments

Question 4

Anterior compartment

Answer 4

Compartment that contains flexor and pronator muscles
Innervated by anterior divisions of the brachial plexus

Question 5

Posterior compartment

Answer 5

Compartment that contains extensor and supinator muscles
Innervated by posterior divisions of the brachial plexus

Question 6

Interosseous membrane

Answer 6

Forms syndesmosis between the radius and ulna
Divides the forearm into anterior and posterior compartments

Question 7

Palmar aponeurosis

Answer 7

Thickened central portion of the palmar fascia

Question 8

Retinacula

Answer 8

Thickenings of deep fascia
Holds tendons close to bones to prevent ‘bowstringing’ during flexion and extension

Question 9

Flexor retinaculum

Answer 9

Forms roof of carpal tunnel
Medial nerve passes deep to here with tendons of digital flexors

Question 10

Extensor retinaculum

Answer 10

Connected to radius and ulna
Forms tunnels for tendons and synovial sheaths of posterior forearm muscles

Question 11

Finger retinacula

Answer 11

Made from anular and cruciform ligaments to prevent bowstringing of flexor tendons in the fingers

Question 12

Innervation of the anterior compartment of the arm

Answer 12

Musculocutaneous muscle

Question 13

Blood supply to anterior compartment of arm

Answer 13

Brachial artery

Question 14

Origin of biceps brachii

Answer 14

Long head- supraglenoid tubercle, glenoid labrum
Short head- coracoid process

Question 15

Insertion of biceps brachii

Answer 15

Radial tuberosity

Question 16

Action of biceps brachii

Answer 16

Supination, elbow flexion, shoulder flexion

Question 17

Bicipital aponeurosis

Answer 17

Blends with deep antebrachial fossa
Protects deep structures in cubital fossa

Question 18

Origin of brachialis

Answer 18

Anterior humerus

Question 19

Insertion of brachialis

Answer 19

Coronoid process and ulnar tuberosity

Question 20

Action of brachialis

Answer 20

Elbow flexion

Question 21

Origin of coracobrachialis

Answer 21

Coracoid process

Question 22

Insertion of coracobrachialis

Answer 22

Medial humerus

Question 23

Action of coracobrachialis

Answer 23

Assist in flexion and adduction of shoulder.
Resist dislocation

Question 24

Superior border of cubital fossa

Answer 24

Line between medial and lateral epicondyles

Question 25

Lateral border of cubital fossa

Answer 25

Brachioradialis and extensor muscle mass

Question 26

Medial border of cubital fossa

Answer 26

Pronator teres and flexor muscle mass

Question 27

Roof of cubital fossa

Answer 27

Deep brachial and antebrachial fascia

Question 28

Origin of pronator teres

Answer 28

Humeral head: medial epicondyle Ulnar head: coronoid process

Question 29

Insertion of pronator teres

Answer 29

Lateral radius

Question 30

Innervation of pronator teres

Answer 30

Medial nerve

Question 31

Action of pronator teres

Answer 31

Pronation

Question 32

Origin of flexor carpi radialis

Answer 32

Medial epicondyle

Question 33

Insertion of flexor carpi radialis

Answer 33

Base of second metacarpal

Question 34

Innervation of flexor carpi radialis

Answer 34

Median nerve

Question 35

Action of flexor carpi radialis

Answer 35

Flexion and abduction of wrist

Question 36

Origin of palmaris longus

Answer 36

Medial epicondyle

Question 37

Insertion of palmaris longus

Answer 37

Palmar aponeurosis and flexor retinaculum

Question 38

Innervation of palmar longus

Answer 38

Median nerve

Question 39

Action of palmaris longus

Answer 39

Tension of palmar aponeurosis, weak wrist flexion

Question 40

Origin of flexor digitorum superficialis

Answer 40

Humero-ulnar head: medial epicondyle and coronoid process Radial head: anterior radius

Question 41

Insertion of flexor digitorum superficialis

Answer 41

Intermediate phalanges 2-5

Question 42

Innervation of flexor digitorum superficialis

Answer 42

Median nerve

Question 43

Action of flexor digitorum superficialis

Answer 43

PIP joint flexion and MCP of 2-5

Question 44

Dorsal boundary of carpal tunnel

Answer 44

Trapezoid, capitate, hamate, triquetrum

Question 45

Medial boundary of carpal tunnel

Answer 45

Hook of hamate, pisiform

Question 46

Lateral boundary of carpal tunnel

Answer 46

Tubercle of trapezium, scaphoid

Question 47

Palmar boundary of carpal tunnel

Answer 47

Flexor retinaculum

Question 48

Origin of flexor digitorum profundus

Answer 48

Ulnar shaft, interosseous membrane

Question 49

Insertion of flexor digitorum profundus

Answer 49

Distal phalanges of digits 2-5

Question 50

Innervation of flexor digitorum profundus

Answer 50

Lateral half: anterior interosseous (from median nerve) Medial half: ulnar nerve

Question 51

Action of flexor digitorum produnfus

Answer 51

Flexion of DIP joints of digits 2-5

Question 52

Origin of flexor pollicis longus

Answer 52

Radial shaft, interosseous membrane

Question 53

Insertion of flexor pollicis longus

Answer 53

Distal phalanx of pollex

Question 54

Innervation of flexor pollicis longus

Answer 54

Anterior interosseous (from median)

Question 55

Action of flexor pollicis longus

Answer 55

Flexion of IP joint of pollex

Question 56

Origin of pronator quadratus

Answer 56

Distal medial ulna

Question 57

Insertion of pronator quadratus

Answer 57

Distal lateral radius

Question 58

Innervation of pronator quadratus

Answer 58

Anterior interosseous (from median)

Question 59

Action of pronator quadratus

Answer 59

Pronation