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Flashcards in Muscles of the Posterior Forearm Deck (59)
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1

Group of muscles that are the extensors and supinators of the wrist and hand

Muscles of the posterior forearm

2

All muscles of the posterior forearm are innervated by the

Radial Nerve

3

4 of the 7 superficial muscles of the posterior forearm originate where?

Common extensor tendon from the lateral epicondyle of the humerus

4

The other 2 muscles of the posterior forearm originate where?

Slightly above the others on the lateral supracondylar ridge

5

All extensor muscle tendons that pass to the hand are held in place by

Extensor Retinaculum

6

Attaches the tendons to the phalanges on the posterior side of the fingers. A triangular hood like structure that covers the dorsal surface of each digit

Extensor expansion hood

7

The 7 muscles of the superficial posterior forearm

Anconeus
Extensor Carpi Ulnaris
Extensor Digiti Minimi
Extensor Digitorum
Extensor Carpi Radialis Brevis
Extensor Carpi Radialis Longus
Brachioradialis

8

Long thin muscle partly overlapped by the brachioradialis on posterior forearm

Extensor Carpi Radialis Longus

9

Where does the extensor carpi radialis insert?

Base of 2nd metacarpal

10

Actions of the extensor carpi radialis

Extends and abducts the wrist (makes a fist)

11

Origin of the extensor radialis longus

Lateral supracondyle ridge of the humerus

12

Innervated by

Radial nerve

13

Muscle that is slightly shorter than the extensor carpi radialis longus that lies deep to it

Extensor radialis brevis

14

Actions of the extensor radialis brevis

Extends and abducts the wrist

15

Origin of the extensor carpi radialis brevis

Lateral epicondyle of the humerus (common extensor tendon

16

Insertion of the extensor carpi radialis brevis

Base of the 3rd metacarpal

17

Innervated by

Radial Nerve

18

The muscle that is the main extensor of the four fingers

Extensor Digitorum

19

The insertion of the extensor digitorum that is a tent of connective tissue

The extensor expansion hood

20

Actions of the extensor digitorum

Extends the proximal phalynx of the digits
Middle and distal phalanges are extended
Extends hand at the wrist

21

Origin of the extensor digitorum

Insertion of the extensor digitorum

Nerve

Lateral epicondyle of the humerus

Extensor expansion hood

Radial nerve

22

Muscle that is a thin slip partially attached to extensor digitorum that goes to the little finger

Extensor Digiti Minimi

23

Actions of extensor digiti minimi

Extends proximal phalynx of fifth finger
Assists in extension of hand

24

Innervated by

Radial Nerve

25

Long band like muscle located along medial border of the forearm

Extensor Carpi Ulnaris

26

The actions of the extensor carpi ulnaris

Extends with carpi radialis and adducts the flexor carpi radialis
-(forms fist)

27

Origins of the extensor carpi ulnaris

Lateral epicondyle
Common extensor tendon
Fibers of posterior surface of the ulna

28

The five deep muscles of the posterior forearm

Supinator
Abductor Pollicis Longus
Extensor Pollicis Brevis
Extensor Pollicis Longus
Extensor Indicis

29

Deep muscle of the posterior forearm that wraps tightly around the upper 1/3 of the radius

Supinator

30

The origins of the supinator

Lateral epicondyle of the humerus
The ulna