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
