Muscles Of The Posterior Forearm

Question 1

Name the seven superficial muscles of the posterior forearm

Answer 1

Brachioradiali, extensor carpi radilas longus and brevis, the extesnor ditirum, the extensor digiti minimi, and the extensor carpi ulnaris and the aconeus

Question 2

Which are the four muscles of the superifical posterior forearm which share a common origin and what is that origin?

Answer 2

Extensor capi radilus brevis, the extensor digitorum, extensor carpi ulnaris and the extensor digiti minimi, and these share a common tendonsus origin at the lateral epicondyle..

Question 3

What is the origin and insertion of the brachioradilus?

Answer 3

Origin ins the porximal aspect of the supracondylar ridge of the huymerous, and attaches to the distal end of the radius.

Question 4

What is the action of the brachioradilas?

Answer 4

It flexes at the elbow

Question 5

What is the nerve for the muscles of the posterior forearm and what are its roots?

Answer 5

The radial nerve, which has the roots c5-T1

Question 6

Where does the extensor digitorum insert?

Answer 6

The extensor hood of the fingers

Question 7

Where does the extensor digiti minimi insert?

Answer 7

The extenosr hood of the little finger

Question 8

What is the insertion of the extensor carpi ulnaris?

Answer 8

Inserts into the base of metacarpal V

Question 9

Where does the aconeus insert?

Answer 9

Inserts into the posterior and lateral part of the olecranon

Question 10

What are the deep muscles of the posterior forearm?

Answer 10

The supinator, the abductor pollicus longus, the extensor pollicus brevis, the extensor pollicus longus, and the extensor indicis poproarius

Question 11

Where does the supinator orignate and insert?

Answer 11

One head of origin from the laterla epicondyle and one from the posterior surface of the ulna, and inserts into the posterior surfaace of the radius

Question 12

Where does the abductor pollicus longus orignate and insert?

Answer 12

Origin is the anterior interssous membrane..

Question 13

Where does the extensor pollicus brevis orignate and insert?

Answer 13

Orignates from the posterior surface of the raidus and attaches to the base of the promiacl phalnxyn

Question 14

What is the action of the extensor pollicus brevis?

Answer 14

Extends at the metacarpohalengela joints, and the carpmetocarpal joints of the thumb and is innervated by the radial nerve,

Question 15

What is the orgin and insertion of the extensor pollicus longus?

Answer 15

Originates from the posterior surface of the ulnar, and interoosur mebtante, and attaches to the distal phalynx of the thumb.

Question 16

What is the origin and insertion of the extensor indicis propoaris

Answer 16

Oringates from the posterior surface of ulna and the interosseous membrane, and attaches to the extensor hood of the index finger

Question 17

What are the features of wrist drop?

Answer 17

This is a sign of radial nerve injury which has occured proximal to the elbow, and is seen via the unopposed flexion of the wrist

Question 18

What are some of the possible causes of raidal nerve injury?

Answer 18

In the axilla can be injured via the humeral dislocations of the proximal humerus, and the radial groove of humerus can be extend by the humeral shaft force