Anterior Forearm Compartment

Question 1

Pronator teres - O & I

Answer 1

O: Humeral Head - medial epicondyle of humerus (via common flexor tendon)
Ulnar Head - coronoid process of ulna
I: Midlateral surface of radius (also site of pronator tubercle)

Question 2

Pronator teres - F & N

Answer 2

F: 1) Pronation of forearm @ radioulnar J
2) Flex. Of forearm @ radioulnar J (weak)
N: Median nerve

Question 3

Flexor carpi radialis - O & I

Answer 3

O: Medial epicondyle of humerus (via common flexor tendon)
I: Base of 2nd and 3rd Metacarpals

Question 4

Flexor carpi radialis - F & N

Answer 4

F: 1) Flex. of hand @ wrist J
2)Flex. of forearm @ elbow J
3)ABD. (Radial deviation) of hand @ wrist J
N: Median nerve

Question 5

Palmaris Longus - O & I

Answer 5

O: Medial epicondyle of humerus (via common flexor tendon)
I: Palmar aponeurosis & Flexor retinaculum

Question 6

Palmaris Longus - F & N

Answer 6

F: 1) Flex. of hand @ wrist J
2) Flex. of forearm @ elbow J (both weak)
N: Median nerve

Question 7

Flexor carpi ulnaris - O & I

Answer 7

O: 1) Medial epicondyle of humerus (via common flexor tendon)
2) Medial side of olecranon process
3) Superior posterior border of ulna
I: Base of 5th metacarpal, hamate and pisiform

Question 8

Flexor carpi ulnaris - F & N

Answer 8

F: 1) Flex. of hand @ wrist J
2) Flex. of forearm @ elbow J
3) Add. (Ulnar deviation) of hand @ wrist J
N: Ulnar nerve

Question 9

Flexor digitorum superficialis - O & I

Answer 9

O: Humeroulnar head: - Medial epicondyle of humerus (via common flexor tendon)
Coronoid process of ulna
Radial head: Proximal of anterior surface (Ant. Oblique line)
I: Base of middle phalanges of fingers #2-5

Question 10

Flexor digitorum superficialis - F & N

Answer 10

F: 1) Flex. of fingers #2-5 @ MCP and PIP J
2) Flex. of hand @ wrist J
3) Flex. of forearm @ elbow J
N: Median nerve

Question 11

Flexor pollicis longus - O & I

Answer 11

O: Ant. Surface of radius & interosseous membrane
I: Base of distal phalanx of thumb

Question 12

Flexor pollicis longus - F & N

Answer 12

F: 1) Flex. of thumb @ CMC, MCP and IP J
2) Flex. of hand @ wrist J
N: Median nerve

Question 13

Flexor digitorum profundus - O & I

Answer 13

O: Proximal anterior surface of ulna, Interosseous membrane
I: Base of phalanges #2-5

Question 14

Flexor digitorum profundus - F & N

Answer 14

F: 1) Flex. Of fingers #2-5 @ MCP, PIP & DIP J
2) Flex. Of hand @ wrist J
N: Median & Ulnar Nerves

Question 15

Pronator quadratus - O & I

Answer 15

O: Anterior surface of distal 1/4 of ulna
I: Anterior surface of distal 1/4 of radius

Question 16

Pronator quadratus - F & N

Answer 16

F: 1) Pronation of forearm @ radioulnar J
N: Median nerve

Question 17

What is the flexor retinaculum?

Answer 17

A transverse band in the anterior side of your wrist that supports the forearm muscles in the posterior aspect of the wrist.