Anterior Forearm

Question 1

What are the 3 compartments of the Anterior forearm?

Answer 1

Superficial compartment
Intermediate compartment
Deep compartment

Question 2

What is the Function of the anterior forearm muscles?

Answer 2

Flexor
Pronators

(Wrist, fingers, thumb and forearm)

Question 3

What is the main innervation of the anterior forearm muscles?

Answer 3

Median nerve

Question 4

What muscles does the median nerve not innervate in the anterior forearm?

Answer 4

Ulnar half of flexor digitorum profundus
Flexor carpi ulnaris

Question 5

What nerve innervates the Ulnar half of flexor digitorum profundus and flexor carpi ulnaris?

Answer 5

Ulnar nerve

Question 6

What are the 4 superficial compartment anterior forearm muscles?

Answer 6

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris

Question 7

Where do all of the superficial compartment anterior forearm muscles originate?

Answer 7

Medial epicondyle

Question 8

What is the medial epicondyle also know as?

Answer 8

Common flexor origin

Question 9

How can you remember how the 4 superficial compartment muscles of the anterior forearm appear near the elbow?

Answer 9

Put thumb underneath medial epicondyle of humerus and put 4 fingers on top of forearm running diagonally
Index = Pronator Teres
Middle finger = Flexor carpi radialis
Ring finger = Palmaris longus
Little finger = Flexor carpi ulnaris

Question 10

What is the extra origin of Pronator teres?
What is the insertion of Pronator teres?

Answer 10

Coranoid process of Ulna
Lateral side of Radius

Question 11

What is the insertion of the Flexor carpi radialis?

Answer 11

Base of metacarpals II and III

Question 12

What is the insertion Palmaris longus?

Answer 12

Flexor retinaculum of wrist
Palmar aponeurosis

Question 13

What is the insertion of Flexor carpi ulnaris?

Answer 13

Pisiform of wrist
Hook of hamate
Base of 5th metacarpal

Question 14

What is special about flexor carpi ulnaris?

Answer 14

It has 2 heads:
-Humeral head
-Ulnar head

Question 15

What is the origin of the humeral head of Flexor carpi ulnaris?

Answer 15

Medial epicondyle of humerus

Question 16

What is the origin of the ulnar head of Flexor carpi ulnaris?

Answer 16

Olecranon of ulnar

Question 17

What are the 2 functions of Flexor carpi ulnaris?

Answer 17

Flexion of wrist
Adduction of wrist

Question 18

What is the function of Pronator Teres?

Answer 18

Pronates forearm

Question 19

What is function of flexor carpi radialis?

Answer 19

Flexor of wrist

Question 20

What is the function of Palmaris longus?

Answer 20

Flexor of wrist

Question 21

What is special about Palmaris longus?

Answer 21

Not present in everyone

Question 22

What pulse can be felt at the wrist?

Answer 22

Radial pulse from radial artery

Question 23

How can you locate the flexor carpi radialis at the wrist?

Answer 23

Its the first tendon medial to/going to the ulnar side of the radial artery

Question 24

How can you locate Palmaris longus if its present at the wrist?

Answer 24

Has a very long tendon and short muscle belly
Ulnar/medial direction to flexor carpi radialis

Question 25

How can you locate flexor carpi ulnaris?

Answer 25

Most medial/ulnar side tendon at the wrist

Question 26

What is the one intermediate compartment anterior forearm muscle?

Answer 26

Flexor digitorum superficialis

Question 27

What is special about flexor digitorum superficialis?

Answer 27

Has 2 heads

Question 28

What are the origins of the 2 heads of flexor digitorum superficialis?

Answer 28

Medial epicondyle of humerus Radius

Question 29

What is the function of Flexor digitorum superficialis?

Answer 29

Finger Flexion (4 fingers): -Metacarpophalangeal joint -Proximal interphalangeal joint Wrist Flexion

Question 30

Where does flexor digitorum superficialis insert?

Answer 30

Middle phalanges of 4 fingers

Question 31

What structure do the 4 tendons of flexor digitorum superficialis pass through at the wrist to reach the fingers?

Answer 31

Carpal tunnel

Question 32

What are the 3 deep muscles of the anterior forearm?

Answer 32

Flexor pollicis longus Flexor digitorum profundus Pronator Quadratus

Question 33

What is the origin of Pronator Quadratus?

Answer 33

Ulnar

Question 34

What is the insertion of Pronator Quadratus?

Answer 34

Radius

Question 35

What is the function of Pronator Quadratus?

Answer 35

Pronates forearm

Question 36

What is the shape of Pronator Quadratus and where abouts is it?

Answer 36

Square shaped Near the wrist

Question 37

There are 2 halves to Flexor digitorum profundus. What are its 2 origins?

Answer 37

Ulnar and intraosseous membrane

Question 38

Where does the tendons of Flexor digitorum profundus insert?

Answer 38

Distal phalanges of the 4 fingers

Question 39

What structure does the 4 tendons of Flexor digitorum profundus pass through to reach the wrist?

Answer 39

Carpal tunnel

Question 40

What is the function of Flexor digitorum profundus?

Answer 40

Flexion of fingers: -DISTAL INTERPHALANGEAL JOINTS (only muscle that can do this) -Metacarpophalangeal joints -Wrist

Question 41

How can you locate flexor digitorum profundus?

Answer 41

Sits deep to flexor digitorum superficialis

Question 42

How is flexor digitorum specially innervated?

Answer 42

Ulnar half = ULNAR NERVE Lateral half = MEDIAN NERVE

Question 43

What fingers is the ulnar half of flexor digitorum profundus and therefore the ULNAR nerve responsible for flexing?

Answer 43

Little finger Ring finger

Question 44

What fingers is the lateral half of flexor digitorum profundus and therefore the Median nerve responsible for flexing?

Answer 44

Middle finger Index finger

Question 45

What is the origin of Flexor Pollicis longus?

Answer 45

Radius Intraosseous membrane

Question 46

What is the function of Flexor pollicis longus?

Answer 46

Flexes the thumb: -Metacarpophalangeal joint -Interphalangeal joint

Question 47

What is special about Flexor pollicis longus?

Answer 47

Its a unipanate muscle: Meaning the muscle only runs down 1 side of the tendon

Question 48

Where is flexor pollicis longus with respect to flexor digitorum profundus?

Answer 48

Flexor pollicis longus is lateral to flexor digitorum profundus

Question 49

What 2 tendons is Pronator Quadratus deep to?

Answer 49

Flexor Digitorum Profundus Flexor Pollicis Longus

Question 50

What 2 muscles does the median nerve run between in the anterior forearm?

Answer 50

Flexor digitorum superficialis Flexor digitorum profundus

Question 51

What 2 muscles is the ulnar nerve sandwiched between?

Answer 51

Flexor digitorum profundus Flexor carpi ulnaris