Tuesdays lecture

Question 1

what type of joint is the distal radioulnar joint (DRUJ)

Answer 1

Pivot type of synoival joint

Question 2

what is the distal radioulnar joint?

Answer 2

• round head of the ulna articulates with the ulnar notch of medial side of distal radius
• TFCC binds the ends of the radius and ulna together
• functions to help transmit loads from the hand to the forearm

Question 3

muscles that attach to the lateral epicondyle

Answer 3

extensor carpi ulnaris 
extensor digiti minimi
extensor digitorium
extensor carpi brevis 
supinator

Question 4

posterior compartment of the forearm

Answer 4

• all innervated by the radial nerve
• held in place by the extensor retinaculum
• 6 different dorsal compartments

Question 5

muscles thats attach to the lateral supracondylar crest

Answer 5

extensor carpi longus

brachioradialis

Question 6

In the first compartment of the posterior forearm

Answer 6

abductor pollicis longus

extensor pollicis brevis

Question 7

2nd compartment of the posterior forearm

Answer 7

extensor carpi radialis longus and brevis

Question 8

3rd compartment of the posterior forearm

Answer 8

extensor pollicis longus

Question 9

4th compartment of the posterior forearm

Answer 9

extensor digitorum

extensor indicis

Question 10

5th compartment of the posterior forearm

Answer 10

extensor digiti minimi

Question 11

6th compartment of the forearm

Answer 11

extensor carpi ulnaris

Question 12

Borders of the Anatomical snuffbox

Answer 12

lateral border:
Extensor pollicis brevis and the Abductor Pollicis Longus

Medial border:
extensor pollicis longus

Question 13

floor of the anatomical snuffbox

Answer 13

scaphoid carpal bone

Question 14

contents of the anatomical snuff box

Answer 14

radial artery and nerve

Question 15

Lateral epicondylosis (Tennis elbow)

Answer 15

• effects the extensor muscles of the forearm that attach to the lateral epicondyle
• caused by repetitive motion

Question 16

Wrist drop

Answer 16

• Radial nerve damage

- (The radial nerve innervates almost all the extensors so drops the hand)

Question 17

DeQuervain’s Syndrome

Answer 17

• inflammation of the structures in the first dorsal compartment
• pain increase with a stretch to these structures
• the extended and abducted position for a long period of time

Question 18

Where is the DeQuervain’s Syndrome more common?

Answer 18

-Daycare worker and new mothers

Question 19

What does supracondyle fracture cause?

Answer 19

damage to the medial nerve and brachial artery

Question 20

What is the anterior portion of the forearm?

Answer 20

Voler

Question 21

What is the posterior portion of the forearm

Answer 21

Dorsum

Question 22

Ulna Deviation

Answer 22

• larger ulna devation

- side to side wrist motion, towards the ulna

Question 23

Radial Deviation

Answer 23

-side to side wrist motion, toward the radial