MSK - Anterior forearm muscles Flashcards Preview

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Flashcards in MSK - Anterior forearm muscles Deck (43):
1

Name the muscles of the superficial compartment of the anterior forearm (4)

- Pronator teres

- Flexor carpi radialis

- Palmaris longus

- Flexor carpi ulnaris

2

What is the origin of pronator teres?

- Medial epicondyle

- Coronoid process of the ulna

3

Where does pronator teres insert?

Laterally to the mid-shaft of the radius

4

What is the innervation of pronator teres?

Median nerve (C6 and C7)

5

What are the actions of pronator teres?

- Pronation of the forearm

- Weak flexion of the forearm at the elbow

6

What is the origin of flexor carpi radialis?

Medial epicondyle

7

Where does flexor carpi radialis insert?

Base of metacarpals 2 and 3

8

What is the innervation of flexor carpi radialis?

Median nerve (C6, C7)

9

What are the actions of flexor carpi radialis?

- Flexion of the wrist

- Radial deviation at the wrist

10

What is the origin of palmaris longus?

Medial epicondyle

11

Where does palmaris longus insert?

- Flexor retinaculum of the wrist

- Palmar aponeurosis

12

What is the innervation of palmaris longus?

Median nerve (C7, C8)

13

What are the actions of palmaris longus?

- Flexion of the hand at the wrist

- Tenses palmar aponeurosis

14

What is the origin of flexor carpi ulnaris?

- Medial epicondyle

15

Where does flexor carpi ulnaris insert?

- Pisiform carpal bone

16

What is the innervation of flexor carpi ulnaris?

- Ulnar nerve (C8, T1)

17

What are the actions of flexor carpi ulnaris?

- Flexion of the hand at the wrist

- Ulnar deviation (adduction)

18

Name the muscle of the intermediate compartment of the forearm

Flexor digitorum superficialis

19

What is the origin of flexor digitorum superficialis?

- One head originates from medial epicondyle

- One head originates from the radius

20

Where does flexor digitorum superficialis insert?

- Splits into four tendons

- Inserts at middle phalanges of digits 2-5 (four fingers)

21

What is the innervation of flexor digitorum superficialis?

Median nerve (C7, C8, T1)

22

What are the actions of flexor digitorum superficialis?

- Flexion of metacarpopharangeal joints

- Flexion of proximal interphalangeal joints

- Flexion of the hand at the wrist

23

Name the THREE muscles of the deep compartment of the forearm

- Flexor digitorum profundus

- Flexor pollicus longus

- Pronator quadratus

24

What is the origin of flexor digitorum profundus?

- Upper 3/4 of anteriomedial ulna

- And surrounding interosseous membrane

25

Where does flexor digitorum profundus insert?

- Splits into four tendons

- Distal phalanges of digits 2-5 (four fingers)

26

What is the innervation of flexor digitorum profundus?

- Medial half (digits 4&5) = ulnar nerve

- Lateral half (digits 2&3) = anterior interosseous branch of the median nerve

27

What are the actions of flexor digitorum profundus?

- Flexion of distal interphalangeal joints

- Flexion of metacarpophalangeal joints

- Flexion of the hand at the wrist

28

What is the origin of flexor pollicus longus?

- Anterior surface of the radius and surrounding membrane

29

Where does flexor pollicus longus insert?

Base of the distal phalanx of the thumb

30

What is the innvervation of flexor pollicus longus?

Anterior interosseous branch of the median nerve

31

What are the actions of flexor pollicus longus?

- Flexion of the interphalangeal joint of the thumb

- Flexion of the metacarpophalangeal joint of the thumb

32

What is the origin of pronator quadratus?

Anterior surface of the ulna

33

Where does pronator quadratus insert?

Anterior surface of the radius

34

What is the innervation of pronator quadratus?

Anterior interosseous branch of the median nerve

35

What are the actions of pronator quadratus?

Pronation of the forearm

36

What is the blood supply of pronator teres?

- Ulnar artery

- Anterior recurrent ulnar artery

37

What is the blood supply of flexor carpi radialis?

Ulnar artery

38

What is the blood supply of palmaris longus?

Ulnar artery

39

What is the blood supply of flexor carpi ulnaris?

Ulnar artery

40

What is the blood supply of flexor digitorum superficialis?

Ulnar artery

41

What is the blood supply of flexor digitorum profundus?

Ulnar and anterior interosseous arteries

42

What is the blood supply of flexor pollicus longus?

Anterior interosseous artery

43

What is the blood supply of pronator quadratus?

Anterior interosseous artery

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