Posterior Compartment of Forearm and Joints of the Forearm

Question 1

What does brachioradialis cover?

Answer 1

1. Superficial radial nerve

2. Radial artery

Question 2

What two muscles are directly innervated by radial nerve?

Answer 2

Brachioradialis and ECRL

Question 3

When does radial nerve send motor branches ?

Answer 3

as soon as it gets into the cubital fossa

Question 4

When does the deep radial branch change its name to posterior interosseous?

Answer 4

as soon as it passes through supinator

Question 5

What are the names for the fibrous bands connecting tendons of extensor digitorum?

Answer 5

intertendinous connection

Question 6

The _______ are extensions of the synovial sheath.

Answer 6

vincula

Question 7

What is the purpose of ht vincula?

Answer 7

holds blood supply to the tendons

Question 8

What nerve pierces the supinator?

Answer 8

posterior interosseous

Question 9

What are the muscles in the deep posterior compartment, from lateral to medial?

Answer 9

1. Supinator
2. APL
3. EPB
4. EPL
5. Extensor indicus

Question 10

What tendons can potentially cause more friction when moving, leading to increased potential for inflammation?

Answer 10

1. EPL
2. EPB
3. APL

Question 11

What is the clinical name for inflammation of the tendons of EPL, EPB and APL?

Answer 11

DeQuarvians syndrome

Question 12

What secondary condition may DeQuarvians lead to?

Answer 12

ganglion in wrist

Question 13

What is Listers tubercle in line with?

Answer 13

axis of middle finger

Question 14

Does ECU share a synovial sheath with another tendon? if so, which?

Answer 14

No

Question 15

Does EDM share a synovial sheath with another tendon? if so, which?

Answer 15

No

Question 16

Does ED share a synovial sheath with another tendon? if so, which?

Answer 16

Yes; EI

Question 17

Does EPL share a synovial sheath with another tendon? if so, which?

Answer 17

No

Question 18

Does ECRB share a synovial sheath with another tendon? if so, which?

Answer 18

Yes; ECRL

Question 19

Does EPB share a synovial sheath with another tendon? if so, which?

Answer 19

Yes; ABL

Question 20

What tendons sit on either side of the dorsal tubercle?

Answer 20

EPL (medial); ECRB and ECRL (lateral)

Question 21

What structures are located in the anatomical snuff box?

Answer 21

1. Radial a.
2. Superficial branch of radial n.
3. Scaphoid

Question 22

What is the dorsal carpal arch formed by ?

Answer 22

Dorsal carpal branch of radial artery and dorsal carpal branch of ulnar arter y

Question 23

Which branches of the dorsal carpal arch reach to the end of the fingers

Answer 23

Dorsal MC a.

Question 24

What type of joint is the proximal radio-ulnar joint?

Answer 24

synovial pivot

Question 25

What type of joint is the middle radio-ulnar joint?

Answer 25

fibrous syndemosis

Question 26

What ligament(s) support(s) the proximal radio-ulnar joint?

Answer 26

annular; quadrate

Question 27

What type of joint is the distal radio-ulnar joint?

Answer 27

synovial pivot

Question 28

What ligament(s) support(s) the the distal radio-ulnar joint?

Answer 28

ant. and post. ligaments of the inferior radio-ulnar joint

Question 29

What is the shape of the TFCC? Why ?

Answer 29

biconcave, because ulna and triquetrum are both convex

Question 30

Supination and pronation increases tension in the TFCC (T/F).

Answer 30

FALSE

Question 31

What is the apex of the TFCC attached to? The base?

Answer 31

styloid process of ulna; inferior portion of ulnar notch of radius

Question 32

What limits supination and pronation of the forearm?

Answer 32

IO membrane