Shared Flashcard Set

Details

Superficial Extensors of Forearm
Superficial Extensor muscles of the Forearm
7
Anatomy
Post-Graduate
11/13/2011

Additional Anatomy Flashcards

 


 

Cards

Term
Brachioradialis
Definition

Origin: Proximal 2/3 of supracondylar ridge of humerus.


Insertion: Lat. surface of distal end of radius proximal to styloid process.


Action: Weak forearm flexion (maximal in mid-pronated/mid-supinated position)


Inervation: Radial n. (C5, C6, C7)


Term

Extensor Carpi Radialis Longus

(ECRL)

Definition

Origin: Lat. supracondylar ridge of humerus.


Insertion: Dorsal aspect, base of 2nd metacarpal.


Action: Extension and radial deviation of wrist; active during fist clenching.


Inervation: Radial n. (C6, C7)

Term

Extensor Carpi Radialis Brevis

(ECRB)

Definition

Origin: Lateral epicondyl of humerus via common extensor tendon.


Insertion: Dorsal aspect, base of 3rd metacarpal.


Action: Extension and radial deviation of wrist.


Inervation:  Deep branch of radial n. (C7, C8).


Blood Supply: Radial a.

Term

Extensor Digitorum

(ED)

Definition

Origin: Lateral epicondyle via common extensor tendon.


Insertion: Dorsal digital expansion (DDE) of med. four digits; AKA extensor expansion.


Action: Extension of med. 4 digits primarily at MCPs, secondarily at IPs.


Inervation: Deep branch of radial n. (C7, C8)


Term

Extensor Digiti Minimi

(EDM)

Definition

Origin: Lateral epicondyle via common extensor tendon.


Insertion: DDE of 5th metacarpal.


Action: Extension of 5th digit primarily at MCP, secondarily at IP.


Inervation: Deep branch of radial n.

Term

Extensor Carpi Ulnaris

(ECU)

Definition

Origin: Lat. epicondyle of humerus; post. border of ulna via shared aponeurosis.


Insertion: Dorsal aspect, base of 5th metacarpal.


Action: Extension and ulnar deviation of wrist; also active during fist clenching.


Inervation: Deep branch of radial n.


Term
Anconeus
Definition

Origin: Lat. epicondyle of humerus.


Insertion: Lat. surface of olecranon and sup. part of post. surface of ulna.


Action: Assists w/ forearm extension; stabilizes elbow joint; may ABD ulna during pronation.


Inervation: Radial n. (C7, C8, T1)

Supporting users have an ad free experience!