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Flashcards in pronator-flexor Muscles of forearm Deck (36):
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muscles of anterior compartment of forearm
superficial layer

pronator teres (PT)
flexor carpi radialis (FCR)
palmaris longus
Flexor carpi ulnaris (FCU): humeral head, ulnar head

1

muscles of anterior compartment of forearm
intermediate layer

flexor digitorum superficialis (FDS)

2

muscles of anterior compartment of forearm
deep layer

flexor digitorum profundus (FDP)
flexor policis longus (FPL)
pronator quadratus

3

info about flexor, pronator muscles

tendons of most flexor muscles pass across anterior surface of the wrist and are held in place by the palmar carpal ligament and the flexor retinaculum or transverse carpal ligament which are thickenings of the antebrachial fascia

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info about superficial layer of flexor-pronator muscles

attached proximally by common flexor tendon to the medial epicondyle of the humerus which is the common flexor origin

5

pronator teres origin

ulnar head: coronoid process of ulna
humeral head: medial epicondyle of humerus

6

pronator teres insertion

middle of convexity of lateral surface of radius

7

pronator teres innervation

median nerve (C6, C7)

8

pronator teres action

pronates and flexes forearm

9

flexor carpi radialis origin

medial epicondyle of humerus

10

flexor carpi radialis insertion

base of 2nd (3rd) metacarpal

11

flexor carpi radialis innervation

Median nerve (c6, C7)

12

flexor carpi radialis action

flexes and abducts hand at wrist

13

palmaris longus origin

medial epicondyle of humerus

14

palmaris longus insertion

distal half of flexor retinaculum, palmar aponeurosis

15

palmaris longus innervation

median nerve (c7, c8)

16

palmaris longus action

flexes hand (at wrist) and tenses palmar aponeurosis

17

flexor carpi ulnaris: humeral head, ulnar head
origin

olecranon and posterior border of ulna (via aponeurosis)

18

flexor carpi ulnaris insertion

pisiform, hook of hamate, 5th metacarpal

19

flexor carpi ulnaris action

flexes and adducts hand at wrist

20

flexor digitorum superficialis origin

humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
radial head: oblique line of radius

21

flexor digitorum superficialis insertion

shafts (bodies) of middle phalanges of medial four digits

22

flexor digitorum superficialis innervation

median nerve (c7, c8, t1)

23

flexor digitorum superficialis action

flexes wrist joint
flexes proximal interphalangeal joints of middle four digits, acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints

24

flexor digitorum profundus origin

proximal three quarters of medial and anterior surfaces of ulna and interosseus membrane

25

flexor digitorum profundus insertion

bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits

26

flexor digitorum profundus innervation

lateral part (to digits 2 and 3): Median nerve (c8, t1) (anterior interosseus branch)
medial part (to digits 4 and 5): ulnar nerve (c8, T1)

27

flexor digitorum profundus action

flexes wrist joint
flexes distal interphalangeal joints of digits 2, 3, 4, and 5
assists with wrist flexion

28

flexor policis longus origin

anterior surface of radius and adjacent interosseus membrane

29

flexor policis longus insertion

base of distal phalanx of thumb

30

flexor policis longus innervation

anterior interosseus nerve, from medial nerve (C8, T1)

31

flexor policis longus action

flexes wrist
flexes metacarpophalangeal and interphalangeal joints of thumb

32

pronator quadratus origin

distal quarter of anterior surface of ulna

33

pronator quadratus insertion

distal quarter of anterior surface of radius

34

pronator quadratus innervation

anterior interosseus nerve, from median nerve (c8, T1)

35

pronator quadratus action

pronates forearm
deep fibers bind radius and ulna together