Cranial and Lateral Forearm Flashcards Preview

Anatomy Midterm > Cranial and Lateral Forearm > Flashcards

Flashcards in Cranial and Lateral Forearm Deck (6)
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1

Extensor carpi radialis m.

origin-
insertion-
action-
innervation-

Origin: the lateral supracondylar crest

Insertion: Tuberosities on dorsal surfaces of metacarpals 2 & 3

Action: to extend the carpal joints

Innervation: radial nerve

2

Common digital extensor m.
origin-
insertion-
action-
innervation-

the 4 tendons of this muscles goes to the distal phalanx of the four main digits

Origin- the lateral epicondyle of the humerus

*Insertion- the extensor processes of the distal phalanges of digits 2-5

Action- Extend carpal joints of carpus & digits 2-5

Innervation: Radial nerve

3

Lateral digital extenseor m.
origin-
insertion-
action-
innervation-

Origin- the lateral epicondyle of the humerus

**Insertion:
-Proximal ends of all phalanges of digits 3-5
-Extensor processes of distal phalanges of these digits

Action - to extend the carpal joints and digits 3-5
Innervation- Radial Nerve

4

Ulnaris lateralis m.
action-
innervation-

*only flexor that lies on the lateral epicondyle that is labeled an extensor*

Action - to abduct the manus and flex the carpal joints

Innervation - radial nerve

5

Supinator m..
action-
innervation-

action: -Rotate forearm laterally (supination)
-Flex elbow joint

innervation - radial nerve

6

Abductor digiti 1 longus m.
action-
innervation-

lies between radius and ulna and crosses to metacarpal 1

action - to abduct the first digit or pollex and extend the carpal joints

Innervation: radial nerve