1.4.1 Posterior Forearm

Question 1

The two compartments of the forearm are separated by?

Answer 1

The two bones (radius and ulna) and the interossues membrane

Question 2

Muscles in the posterior compartment of the forearm originate from the?

Answer 2

Lateral epicondyle and epicondyle ridge of the humerus

Question 3

Muscles in the posterior compartment of the forearm function as?

Answer 3

Extensors and supinators

Question 4

What nerve innervates the posterior compartment of the forearm?

Answer 4

The radial nerve

Question 5

What muscle flexes the elbow joint?

Answer 5

Brachioradialis

Question 6

What muscles extend, abduct, or adduct the wrist joint?

Answer 6

Extensor carpi radialis longus and brevis, extensor carpi ulnaris

Question 7

What muscles extend the medial four digits? (3)

Answer 7

Extensor digitorum, extensor indicis, and extensor digiti minimi

Question 8

What muscles extend or abduct the thumb? (3)

Answer 8

Abductor pollicis longus

Extensor pollicis brevis

Extensor pollicis longus

Question 9

What muscles supinate the forearm?

Answer 9

Supinator

Question 10

These muscle have proximal attachment to the supracondylar ridge of the humerus?

Answer 10

Brachioradialis and extensor carpi radialis longus

Question 11

These muscles have common extensor tendon attach to lateral epicondyle.

Answer 11

Extensor carpi radialis brevis, extensor digitorum, Extensor digiti minimi, and extensor carpi ulnaris

Question 12

Brachioradialis has what function?

Answer 12

Flexes the elbow joint/forearm

Question 13

What is the origin of the brachioradialis?

Answer 13

Suprarepicondylar ridge

Question 14

Where does the brachioradialis insert?

Answer 14

Lateral surface of radius

Question 15

What is the origin of the extensor carpi radialis longus?

Answer 15

Lateral supraepicondylar ridge

Question 16

Where does the extensor carpi radialis longus insert?

Answer 16

Base of 2nd metacarpal

Question 17

What is the origin of the extensor carpi radialis brevis?

Answer 17

Lateral epicondylar ridge

Question 18

Where does the extensor carpi radialis brevis insert?

Answer 18

Into the base of the 3rd metacarpal

Question 19

What is the function of the extensor carpi radialis?

Answer 19

Extend and abduct/radial deviates the wrist

Question 20

What is the function of the Abductor Pollicis longus?

Answer 20

Abduct the thumb at the carpomatacarpal joint

Question 21

Where does the abductor pollicis longus insert?

Answer 21

Base of the 1st metacarpal

Question 22

Where does the abductor pollicis longus originate?

Answer 22

Post Surface of ulna, radius, inteross membrane

Question 23

What is the function of the extensor pollicis brevis?

Answer 23

Extend the thumb

Question 24

Where does the extensor pollicis brevis insert?

Answer 24

it lies parallel to the APL tendon, but it travels further and inserts to the base of the proximal phalanx of the thumb

Question 25

What are the covered parts and what do they make up?

Answer 25

These make up the anatomical snuff box

Question 26

Where do the extensor pollicis brevis and longus originate from?

Answer 26

Posterior radius Interosseus membrane

Question 27

Where does the extensor pollicis longus insert?

Answer 27

The base of the distal phalanx

Question 28

What is the function of the extensor pollicis longus?

Answer 28

Extends interphalangeal joint and metacarpophalangeal joint of the thumb

Question 29

What are the contents of the anatomical snuff box?

Answer 29

Extensor pollicis longus and brevis Radial artery Scaphoid

Question 30

Extensor digitorum functions to?

Answer 30

Extend the medial four digits

Question 31

Extensor digitorum originates from the?

Answer 31

Lateral epicondyle

Question 32

Extensor digitorum inserts?

Answer 32

On the extensor expansion

Question 33

Extensor tendons enter the hand through a _______ which lies deep to the \_\_\_\_\_\_\_.

Answer 33

Common Synovial sheath; extensor retinaculum

Question 35

Describe the extensor digitorum at the distal metacarpal.

Answer 35

Question 36

Describe the extensor digitorum at the proximal phalanx.

Answer 36

Question 37

Compare the flexors and extensor hand insertions.

Answer 37

Question 38

The extensor digiti minimi enters the hand deep to the ______ in its own \_\_\_\_\_.

Answer 38

Extensor retinaculum; synovial sheath

Question 39

The extensor digiti minimi functions?

Answer 39

To extend

Question 40

The extensor carpi ulnaris inserts?

Answer 40

Inserts on the base of the 5th metacarpal

Question 41

The extensor indicis origin?

Answer 41

Ulna interos membrane

Question 42

The extensor indicis enters the hand deep to the extensor retinaculum \_\_\_\_\_\_\_\_\_\_\_.

Answer 42

WIthin the common synovial sheath together with the extensor digitorum

Question 43

The extensor indicis tendon is located on the _______ side of the extensor digitorum tendon

Answer 43

Medial/ulnar side

Question 44

The supinator muscle originates?

Answer 44

Partially originates from lateral epicondyle and also from radial collateral ligament and anular ligament

Question 45

Where does the supinator insert?

Answer 45

It inserts into lateral, anterior/posterior surface of radius

Question 46

What is the function of the supinator?

Answer 46

Supinates the forearm by rotating radius

Question 47

What are the characteristics of elbow tendonitis (Lateral epicondylitis)?

Answer 47

Question 48

What is a synovial cyst of the wrist?

Answer 48

Question 49

What are the characteristics of the superficial branch of the radial nerve?

Answer 49

Question 50

What are the characteristics of the deep branch of the radial nerve?

Answer 50