Anterior Flexor Compartment of Forearm

Question 1

What are the three muscle layers of the anterior compartment?

Answer 1

Superficial
Intermediate
Deep

Question 2

Common Origin for most of the muscles in the anterior compartment?

Answer 2

Medial Epicondyle of the Humerus

Question 3

Functions of muscles in the anterior compartment?

Answer 3

Flexion of the digits
General movement of the wrist
Forearm Pronation

Question 4

Muscles in the superficial layer?

Answer 4

Flexor Carpi Radialis
Flexor Carpi Ulnaris
Palmaris Longus
Pronator Teres

Question 5

Function of Flexor Carpi Radialis

Answer 5

Flexor (and abductor) of the wrist

Question 6

Origin of Flexor Carpi Radialis

Answer 6

Medial Epicondyle

Question 7

Insertion of Flexor Carpi Radialis

Answer 7

Base of Metacarpals 2 and 3

Question 8

Innervation of Flexor Carpi Radialis

Answer 8

Median Nerve

Question 9

Function of Flexor Carpi Ulnaris

Answer 9

A powerful flexor (and adductor) or the wrist

Question 10

Origin of Flexor Carpi Ulnaris

Answer 10

Medial Epicondyle (humeral head)
Olecranon/Posterior Ulna (ulnar head)

Question 11

Insertion of Flexor Carpi Ulnaris

Answer 11

Pisiform Bone

Hamate and Metacarpal 5 via Pisohamate and Pisometacarpal ligaments

Question 12

Innervation of Flexor Carpi Ulnaris

Answer 12

Ulnar Nerve

Question 13

Function of Palmaris Longus

Answer 13

Flexion of the wrist and protection of the hand during grip

Question 14

Origin of Palmaris Longus

Answer 14

Medial Epicondyle

Question 15

Insertion of Palmaris Longus

Answer 15

Palmar Aponeurosis

Question 16

Innervation of Palmaris Longus

Answer 16

Median Nerve

Question 17

Function of Pronator Teres

Answer 17

Rotates the radius over the ulna during pronation

Question 18

Origin of Pronator Teres

Answer 18

Medial Epicondyle (humeral head)
Coronoid Process- Supraepicondylar ridge (ulnar head)

Question 19

Insertion of Pronator Teres

Answer 19

Mid-Lateral Radius

Question 20

Innervation of Pronator Teres

Answer 20

Median Nerve

Question 21

Function of Flexor Digitorum Superficialis

Answer 21

Flexion of the wrist

Flexion of the metacarpo-phalangeal joints of Digits 2-5

Flexion of proximal interphalangeal joints of Digits 2-5

Question 22

Origin of Flexor Digitorum Superficialis

Answer 22

Medial Epicondyle and medial Coronoid Process of Ulna (Humero-Ulnar head)
Anterior Oblique line of Radius

Question 23

Insertion of Flexor Digitorum Superficialis

Answer 23

Palmer side of middle phalanx (Digits 2-5)

Question 24

Innervation of Flexor Digitorum Superficialis

Answer 24

Median Nerve

Question 25

Function of Flexor Digitorum Profundus

Answer 25

Flexion of Distal Interphalangeal Joints of Digits 2-5

Flexion of the wrist and Metacarpo- phalangeal joints

Question 26

Origin of Flexor Digitorum Profundus

Answer 26

Anterior Medial Ulna, and medial interosseous membrane

Question 27

Insertion of Flexor Digitorum Profundus

Answer 27

Distal Phalanges of Digits 2-5

Question 28

Innervation Flexor Digitorum Profundus

Answer 28

Ulnar Nerve (medial 1⁄2)
Anterior Interosseus Nerve (branch of Median nerve, lateral 1⁄2)

Question 29

Function of Flexor Pollicis Longus

Answer 29

Flexor of the thumb

Question 30

Origin of Flexor Pollicis Longus

Answer 30

Anterior Radius and interosseous membrane

Question 31

Insertion of Flexor Pollicis Longus

Answer 31

Distal Phalanx of Digit 1

Question 32

Innervation of Flexor Pollicis Longus

Answer 32

Anterior Interosseus Nerve (branch of Median nerve)

Question 33

Function of Pronator Quadratus

Answer 33

Pronation (pulls distal radius over ulna)

Question 34

Origin of Pronator Quadratus

Answer 34

Linear ridge on Distal Ulna

Question 35

Insertion of Pronator Quadratus

Answer 35

Distal Radius

Question 36

Innervation of Pronator Quadratus

Answer 36

Anterior Interosseus Nerve (branch of Median nerve)