Muscles of anterior forearm

Question 1

What are the origins/insertions of the pronator teres?

Answer 1

Origin: 2 headed: Medial supracondylar humerus ridge, medial coronoid process of ulna

Insertion: Middle 1/3 of anterolateral radius

Question 2

What is the function of the pronator teres joints

Answer 2

Pronates the forearm at radioulnar joints

Question 3

What innervates pronator teres?

Answer 3

Median nerve (C6-7)

Question 4

What supplies the pronator teres with blood

Answer 4

Ulnar recurrent and collateral artery, radial artery

Question 5

What are the origins/insertions of flexor carpi radialis?

Answer 5

Origin: Medial epicondyle of humerus

Insertion: Palmar aspects of bases f 2nd and 3rd metacarpal bones

Question 6

What is the action of flexor capi radialis

Answer 6

Flexes hand at the radiocarpal (wrist) joint, abdcuts hand at radiocarpal, midcarpal joints

Question 7

What innervates flexor carpi ulnaris?

Answer 7

Median nerve (C6-7)

Question 8

What supplies flexor carpi ulnaris with blood?

Answer 8

Radial artery, posterior branch of ulnar recurrent artery

Question 9

What muscle of the anterior forearm is absent in some

Answer 9

Palmaris longus

Question 10

What are the insertions and origins for flexor carpi ulnaris?

Answer 10

Origin: Medial epicondyle of humerus via common flexor tendon,
Inserion: Pisiform, hook of hamate, palmar aspect of base of 5th metacarpal bone

Question 11

What is the action of flexor carpi ulnaris?

Answer 11

Flexes and adducts at radiocarpal joint

Question 12

What innervates flexor carpi ulnaris?

Answer 12

Ulnar nerve (C7-T1)

Question 13

What supplies flexor carpi ulnaris with blood?

Answer 13

Ulnar artery, ulnar recurrent artery

Question 14

What are the origins and insertions of flexor digitorum superficialis?

Answer 14

Origin: medial epcindyle of humerus, via common flexor tendon.

Also parts of proximal ulna and radius

Insertion: Palmar aspects of bodies of middle phalanges of 2nd to 5th fingers

Question 15

What is the function of flexor digitorum superficialis?

Answer 15

Flexes index, middle, ring, and little fingers at proximal interphalangeal joint, and metacarpophalangeal joint

Question 16

What innervates the flexor digitorum superficialis?

Answer 16

Median nerve (C7-T1)

Question 17

What artery supplies the flexor digitorum superficialis?

Answer 17

Anterior branch of ulnar recurrent artery, ulnar and radial arteries

Question 18

WHat are the origins/insertions of flexor digitorum profundus

Answer 18

Origin: Coronoid process and upper ulna

Insertion: Palmar aspects of bases of distal phalanges 2nd to 5th

Question 19

WHat are the functions of flexor digitorum profundus

Answer 19

Flexion of DIP, PIP, and MCP joints 2nd to 5gth

Question 20

What does this describe:

“A strong fibrous band that passes between the medial and lateral carpal bones, forms the roof of the carpal tunnel, stops long flexor tendons from bowstringing”

Answer 20

Flexor retinaculum

Question 21

What does this describe?

“Distally its attachments split and attach to either side of the middle phalanges of the lateral 4 digits.
Flexes the MCP and PIP joints of lateral joints only

Answer 21

Flexor digitorum superficialis

Question 22

What does this describe?

Attaches to distal phalanges of lateral 4 digits, Flexor of these lies deep in the forearm, flexes MCP, PIP, DIP joints

Answer 22

Flexor digitorum profundus

Question 23

What does this describe:

Flexor of the MCP and IP joint of the 1st digit

Answer 23

Flexor pollicis longus

Question 24

What is the origin/insertion of flexor pollicis longus?

Answer 24

Anterior surface of radius,

Insertion: Palmar aspect of base of distal phalanx of thumb

Question 25

What is the action of the flexor pollicis longus?

Answer 25

Flexes thumb

Question 26

WHat innervates the flexor pollicis longus?

Answer 26

Anterior antebrachial interosseous nerve (C7-T1)

Question 27

What supplies the flexor pollicis lingus with blood

Answer 27

Anterior interosseus artery, radial artery

Question 28

What are the origins/insertions of pronator quadratus

Answer 28

Origin: anterior aspectr of distal 1/4 ulna Insertion: Pronates arm at radioulnar joints

Question 29

What is the function of pronator quadratus?

Answer 29

Pronates forearm at radioulnar joints

Question 30

What innervates pronator quadratus?

Answer 30

Anterior antebrachial interosseous nerve (C7-8)

Question 31

What supplies pronator quadratus with blood

Answer 31

Anterior interosseous artery

Question 32

What nerve innervates skin of the little finger, medial 1/2 of the ring finger, and palm/dorsal hand parallel

Answer 32

The ulnar nerve

Question 33

What nerve innervates the lateral 1/2 of the ring finger, 3rd, 2nd and thumb from palmar aspect and fingertips from dorsum of hand and the hand parallel?

Answer 33

Median nerve

Question 34

What nerve innervates a small part of the thenar mass, and most of the lateral dorsal hand excluding fingertips?

Answer 34

Radial nerve

Question 35

What tendons pass through the carpal tunnel

Answer 35

Flexor pollicus longus, 4 flexor digitorum superficialis tendons, for flexor digitorum longus tendons

Question 36

What is carpal tunnel syndrome?

Answer 36

WHen tendon sheaths paaing thoigh the carpal tunnel become inflamed, This reduces the space within the tunnel, compressing the median nerve

Question 37

What muscles do the median nerve supply?

Answer 37

All of the anterior forearm muscles apart from flexor carpi ulnaris and ulnar digitorum profundus

Question 38

What muscles do the median nerve supply in the hand?

Answer 38

2 lateral lumbricals, opponens pollicis, abductor pollicis brevis, flexor pollicis brevis

Question 39

Why does preventing movement of the PIP joint test the function of flexor digitorum profundus only?

Answer 39

Because only flexor digitorum profundus reaches the DIPjoint

Question 40

Why does holding down the distal phalanges ensure only flexor digitorum superficialis is tested?

Answer 40

A single tendon from the flexor digitorum profundus cannot work independently of each other

Question 41

What is the order of the normal digital sweep

Answer 41

MCP first, then PIP, then DIP last