Forearm

Question 1

The radius and ulna are joined by?

Answer 1

An interrosseous membrane

Question 2

The head of the ulna is the __________whereas the head of the radius is the __________

Answer 2

Distal end and proximal end

Question 3

The forearm is divided into?

Answer 3

Anterior compartment and posterior compartment

Question 4

The anterior compartment is made up of__________and _________

Answer 4

Flexors and pronators

Question 5

The posterior compartment is made up of _______and _________

Answer 5

Extensors and supinators

Question 6

What are the muscles of the anterior compartment?

Answer 6

1. Superficial muscles
2. Intermediate muscles
3. Deep muscles

Question 7

What are the superficial muscles of the anterior compartment of the forearm?

Answer 7

1. Flexor Carpi ulnaris
2. Palmaris longus
3. Flexor Carpi radials
4. Pronator teres

Question 8

Where do the superficial muscles originate from?

Answer 8

They originates from a common tendon which arise from the medial epicondyle of the humerus

Question 9

What is the origin of flexor Carpi ulnaris?

Answer 9

Originates from the medial epicondyle and has a long origin from the ulna

Question 10

What is the insertion of the flexor Carpi ulnaris?

Answer 10

Attaches to the pisiform, hook of hamate bone and metacarpal 5

Question 11

What is the innervation of the flexors Carpi ulnaris?

Answer 11

Ulnar nerve

Question 12

What is the action of the flexor Carpi ulnaris?

Answer 12

Flexion and adduction at the wrist

Question 13

What is the origin of flexor Carpi radialis?

Answer 13

Originates from the medial epicondyle

Question 14

What is the insertion of the flexor Carpi radialis?

Answer 14

Attaches to the base of metacarpal 2

Question 15

What is the innervation of flexor Carpi radialis?

Answer 15

Median nerve

Question 16

What is the action of flexor Carpi radialis?

Answer 16

Flexion and abduction of the wrist

Question 17

What muscle is absent in about 15% of the population?

Answer 17

Palmaris longus muscle

Question 18

What is the origin of the palmaris longus?

Answer 18

Originates from the medial epicondyle

Question 19

What is the insertion of the palmaris longus?

Answer 19

Attaches to the flexor retinaculum of the wrist

Question 20

What is the innervation of the palmaris longus?

Answer 20

Median nerve

Question 21

What is the action of the palmaris longus?

Answer 21

Flexion of the wrist

Question 22

What border of the pronator teres forms the medial border of the cubital fossa?

Answer 22

The lateral border

Question 23

What is the origin of the pronator teres?

Answer 23

1. Medial epicondyle
2. Coronoid process of the ulna

Question 24

What is the insertion of the pronator teres?

Answer 24

Attaches laterally to the mid-shaft of the radius

Question 25

What is the innervation of the pronator teres?

Answer 25

Median nerve

Question 26

What is the action of the pronator teres?

Answer 26

Pronation of the forearm

Question 27

What is the intermediate muscle of the anterior compartment of the forearm?

Answer 27

Flexor digitorum superficaialis

Question 28

Why does the flexor digitorum superficaialis muscle serve as a good anatomical landmark of the forearm?

Answer 28

Because the median nerve and ulnar artery pass between it's two heads and then travel posteriorly

Question 29

What is the origin of the flexor digitorum superficaialis?

Answer 29

1. Originates from the medial epicondyle 2. Originates from the radius

Question 30

What is the insertion of the flexor digitorum superficaialis?

Answer 30

It's attaches to the middle phalanges of the four fingers

Question 31

What is the innervation of the flexor digitorum superficaialis?

Answer 31

Median nerve

Question 32

What is the action of the flexor digitorum superficaialis?

Answer 32

It flexes the metacarpophalangeal joints and the proximal interphalangeal joints at the 4 fingers and flexes the wrist

Question 33

What are the deep muscles of the anterior compartment of the forearm?

Answer 33

1. Flexor digitorum profundus 2. Flexor pollicis longus 3. Pronator quadratus

Question 34

What is the origin of flexor digitorum profundus?

Answer 34

Originates from the ulna and interosseous membrane

Question 35

What is the insertion of the flexor digitorum profundus?

Answer 35

It attaches to the distal phalanges of the 4 fingers

Question 36

What is the innervation of the flexor digitorum profundus?

Answer 36

1. Medial half is innervated by the ulnar nerve 2. Lateral half is innervated by the anterior interosseous branch of the median nerve

Question 37

What is the action of the flexor digitorum profundus?

Answer 37

1. It is the only muscle that can flex the distal interphalangeal joints of the fingers 2. It flexes the metacarpophalangeal joints and the wrist

Question 38

What muscle lies laterally to the flexor digitorum profundus?

Answer 38

Flexor pollicis longus

Question 39

What is the origin of the flexor pollicis longus

Answer 39

Originates from the anterior surface of the radius and the interosseous membrane

Question 40

What is the insertion of the flexor pollicis longus?

Answer 40

It attaches to the base of the distal phalanx of the thumb

Question 41

What is the innervation of the flexor pollicis longus?

Answer 41

Anterior interrosseous branch of the median nerve

Question 42

What is the action of the flexor pollicis longus?

Answer 42

Flexes the interphalangeal joints and the metacarpophalangeal joints of the thumb

Question 43

A square shaped muscle found deep to the flexor digitorum profundus and the flexor pollicis longus is ?

Answer 43

Pronator quadratus

Question 44

What is the origin of the pronator quadratus?

Answer 44

Originates form the anterior surface of the ulna

Question 45

What is the insertion of the pronator quadratus?

Answer 45

It attaches to the anterior surface of the radius

Question 46

What is the innervation of the pronator quadratus?

Answer 46

Anterior interrosseous branch of the median nerve

Question 47

What is the action of pronator quadratus?

Answer 47

Pronates the forearm

Question 48

What are the muscles of the posterior compartment of the forearm?

Answer 48

1. Superficial muscles 2. Deep muscles

Question 49

What are the superficial muscles of the deep compartment of the forearm?

Answer 49

1. Brachioradialis 2. Extensor Carpi radialis longus 3. Extensor Carpi radialis brevis 4. Extensor digitorum 5. Extensor Carpi ulnaris 6. Extensor Carpi minimi 7. Anconeus

Question 50

What is the origin of the brachioradialis?

Answer 50

Originates from the proximal aspect of the lateral supracondylar ridge of the humerus

Question 51

What is the insertion of the brachioradialis?

Answer 51

It Attaches to the distal end of the radius

Question 52

What is the innervation of the brachioradialis?

Answer 52

Radial nerve

Question 53

What is the action of the brachioradialis?

Answer 53

Flexes at the elbow

Question 54

What is the origin of the extensor Carpi radialis longus?

Answer 54

Originates from the supracondylar ridge of the humerus

Question 55

What is the insertion of the extensor Carpi radialis longus?

Answer 55

Attaches to the metacarpal bone 2

Question 56

What is the innervation of the extensor Carpi radialis longus?

Answer 56

Radial nerve

Question 57

What is the origin of the extensor Carpi radialis brevis?

Answer 57

Originates from the lateral epicondyle of the humerus

Question 58

What is the insertion of extensor Carpi radialis brevis?

Answer 58

Attaches to the metacarpal bone 3

Question 59

What is the innervation of extensor Carpi radialis brevis?

Answer 59

Radial nerve

Question 60

What is the action of extensor Carpi radialis brevis?

Answer 60

Extends and abducts the wrist

Question 61

What is the origin of extensor digitorum?

Answer 61

Originates from the lateral epicondyle

Question 62

What is the insertion of the extensor digitorum

Answer 62

Inserts into the extensor hood of each finger