Muscles of the Anterior Forearm Flashcards Preview

ESA 2- Musculoskeletal System > Muscles of the Anterior Forearm > Flashcards

Flashcards in Muscles of the Anterior Forearm Deck (42):
1

What categories are the muscles of the anterior forearm split into?

Superficial, Intermediate, Deep

2

What do the muscles in the anterior compartment of the forearm do?

In general, produce flexion at the wrist and fingers, and pronation

3

What are the superficial muscles of the anterior forearm?

Flexor carpi ulnaris 
Palmaris longus 
Flexor carpi radialis 
Pronator teres

4

What do all the muscles of the superficial compartment of the anterior forearm originate from?

A common tendon, which arises from the medial epicondyle of the humerus

5

What does the flexor carpi ulnaris have?

A humeral and ulnar head

6

What is the innervation of the FCU?

Ulnar nerve (C7, C8)

7

What % of the population is the palmaris longus absent in?

15%

8

What is the innervation of the palmaris longus?

Median nerve (C7, C8)

9

What is the arterial supply of the palmaris longus?

Ulnar artery

10

What is the function of the palmaris longus?

Flexes hand at wrist 
Tenses palmar aponeurosis

11

What is the innervation of the FCR?

Median nerve (C6, C7)

12

What is the arterial supply of the FCR?

Ulnar artery

13

What is the action of the FCR?

Flexes and abducts hand (at wrist)

14

What does the lateral border of the pronator teres form?

The medial border of the cubital fossa

15

What does the pronator teres have?

An ulnar head and a humeral head

16

What is the innervation of the pronator teres?

Median nerve (C6, C7)

17

What is the arterial supply of the pronator teres?

Ulnar artery 
Anterior ulnar recurrent artery

18

What is the main action of the pronator teres?

Pronates and flexes the forearm at the elbow

19

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

Flexor digitorum superficialis

20

Why is the flexor digitorum superficialis a good anatomical landmark?

The median nerve and ulnar artery pass between its two heads, and then travel posteriorly

21

What does the FDS have?

Humero-ulnar head
Radial head

22

What happens to the FDS at the wrist?

It splits into four tendons, which travel to through the carpal tunnel

23

What is the innervation of the FDS?

Median nerve (C7, C8, T1)

24

What is the arterial supply of the FDS?

Ulnar artery

25

What is the main action of the FDS?

Flexes middle phalanges at proximal interphalangeal joints of middle four digits 
Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

26

What are the muscles of the deep anterior forearm?

Flexor digitorum profundus 
Flexor pollicis longus 
Pronator quadratus

27

What does the flexor digitorum profundus have?

Medial part and lateral part

28

What happens to the FDP at the wrist?

It splits into four tendons which pass through the carpal tunnel

29

What is the innervation of the medial part of the FDP?

Ulnar nerve (C8, T1)

30

What is the innervation of the lateral part of the FDP?

Anterior interosseous nerve, from median nerve (C8, T1)

31

What is the arterial supply for the FDP?

Ulnar artery 
Anterior interosseous artery

32

What is the main action of the medial part of the FDP?

Flexes distal phalanges 4 and 5 at the distal interphalangeal joints

33

What is the main action of the lateral part of the FDP?

Flexes distal phalanges 2 and 3 at the distal phalangeal joints

34

Where does the flexor pollicis longus lie?

Laterally to the FDP

35

What is the innervation of the FPL?

Anterior interosseous nerve, from median nerve (C8, T1)

36

What is the arterial supply of the FPL?

Anterior interosseous artery

37

What is the main action of the FPL?

Flexes phalanges of thumb

38

What shape is the pronator quadratus?

Square

39

Where is the pronator quadratus found?

Deep to the tendons of the FDP and FPL

40

What is the innervation of the pronator quadratus?

Anterior interosseous nerve, from median nerve (C8, T1)

41

What is the arterial supply of the pronator quadratus?

Anterior interosseous artery

42

What is the main function of the pronator quadratus?

Pronate forearm 
Deep fibres bind radius and ulna together