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Flashcards in Anterior Forearm Deck (27):
1

How many muscles are there in the anterior forearm?

8
superficial = 4
intermediate = 1
deep = 3

2

what is the main action of the anterior compartment?

flexion at wrists and fingers
pronation

3

where is the common flexor origin?

medial epicondyle of the humerus

4

where does the flexor carpi ulnaris attach?

common flexor origin + additional head from ulna.
pisiform bone

5

what is the action and innervation of the flexor carpi ulnaris?

flexion and adduction at wrist
ulnar nerve

6

where does palmaris longus attach?

common flexor origin
flexor retinaculum

7

what is the function of the flexor retinaculum?

prevents "bowstringing" - holds the tendons down.

8

what is the action and innervation of palmaris longus?

flexion at wrist
median nerve

9

where does the flexor carpi radialis attach?

common flexor origin
bases of metacarpals II and III

10

what is the action and innervation of flexor carpi radialis?

flexion and abduction at wrist
median nerve

11

what border of the cubital fossa does the pronator teres contribute to?

medial border

12

where does the pronator teres attach?

common flexor origin
mid-shaft of radius

13

what is the action and innervation of pronator teres?

pronation of forearm
median nerve

14

name the 4 superficial muscles of the anterior compartment of the forearm

flexor carpi ulnaris, flexor carpi radialis, palmaris longus, pronator teres

15

name the muscle that lies in the intermediate layer of the anterior compartment of the forearm

flexor digitorum superficialis

16

which two important structures pass between the 2 heads of the flexor digitorum superficialis?

median nerve and ulnar artery

17

where does the flexor digitorum superficialis attach?

one head from common flexor origin, and one from radius
middle phalanges of the 4 fingers

18

what is the action and innervation of flexor digitorum superficialis?

flexes at MCP and proximal IP joints of the 4 fingers
flexes at wrist
median nerve

19

name the 3 muscles in the deep layer of the anterior compartment of the forearm?

flexor digitorum profundus, flexor pollicis longus, pronator quadratus

20

what are the attachments of flexor digitorum profundus?

ulna + interosseous membrane
distal phalanges of the 4 fingers

21

what is the action of flexor digitorum profundus?

only muscle to flex distal IP joints
also flexes at MCP joints and wrist

22

what is the innervation of flexor digitorum profundus?

medial two fingers = ulnar nerve
lateral two fingers = median nerve

23

what are the attachments of flexor pollicis longus?

radius
distal phalanx of thumb

24

what is the action and innervation of flexor pollicis longus?

flexes IP + MCP joints of thumb
median nerve

25

what are the attachments of pronator quadratus?

ulna to radius

26

what is the action and innervation of pronator quadratus?

pronates forearm
median nerve

27

which 2 nerves supply the anterior compartment of the forearm?

median and ulnar