Anatomy of the Wrist and Forearm

Question 1

Describe the route that the radial nerve takes?

Answer 1

Travels posterior to the humerous and travels inside the radial grove alongside the profunda brachii artery (branch of the brachial artery), it then passes lateral to the lateral epicondyle

Question 2

Which part of the humerous articulates with the radius head?

Answer 2

Capitulem

Question 3

Where is the coracoid fossa located and what is its significance during flexion of the elbow?

Answer 3

Coranoid fossa lies superior to the ulnar bone and during flexion the coranoid process of the ulnar bone sits within this fossa

Question 4

What part of the humerous articulates with the ulnar head?

Answer 4

Trochlear

Question 5

Where does the tendon of brachialis muscle attach onto inferiorly?

Answer 5

Ulnar

Question 6

What holds the radius against the capitulem?

Answer 6

Ring of annular ligament

Question 7

Where does the tendon of biceps brachii muscle attach onto inferiorly?

Answer 7

Radius

Question 8

What lies in-between the radius and ulnar?

Answer 8

Interroussus membrane

Question 9

What muscles bring about supernation?

Answer 9

Supernator

Biceps brachii

Question 10

What muscles bring about pronation?

Answer 10

Pronator teres

Pronator quadratus

Question 11

Name the 4 distal carpal bones from medial to lateral?

Answer 11

Hamate
Capitulate
Trapezoid
Trapezium

Question 12

Name the 4 proximal carpal bones from medial to lateral?

Answer 12

Pisiform
Triquetrium
Lunate
Scaphoid

Question 13

Name all of the superficial muscles of the anterior compartment of the forearm?

Answer 13

Pronator teres
Flexor carpi radialis
Palmaris longus (may be absent)
Flexor digitorum superficialis
Flexor carpi ulnaris

Question 14

What is the nerve innervation of the superficial muscles of the anterior compartment of the forearm? Which muscle is an exception to this and what is its nerve supply?

Answer 14

Median nerve
Flexor carpi ulnaris
Ulnar nerve

Question 15

Name all of the deep muscles of the anterior compartment of the forearm?

Answer 15

Pronator quadratus
Flexor digitorum profundus
Flexor pollicis longus

Question 16

Which muscle of the forearm receives bi-nerve innervation, and what two nerves supply this?

Answer 16

Flexor digitorum profundus (deep/anterior compartment)

Ulnar and median nerve

Question 17

Where do all of the superficial muscles of the anterior compartment attach onto superiorly?

Answer 17

Medial epicondyle

Question 18

Name all of the superficial muscles of the posterior compartment of the forearm?

Answer 18

Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris

Question 19

Name all of the deep muscles of the posterior compartment of the forearm?

Answer 19

Supernator (wank muscle)
Abductor pollicus longus
Extensor pollicus brevis
Extensor Pollicus Longus
Extensor indicus

Question 20

What is the nerve supply on both of the posterior compartments of the forearm?

Answer 20

Radial nerve

Question 21

What fracture concerning the wrist is likely to occur in older people?

Answer 21

Colles fracture (distal radius)

Question 22

What fracture concerning the wrist is likely to occur in younger people?

Answer 22

Scaphoid fracture - this can lead to avascular necrosis

Question 23

Name the five P’s associated with compartment syndrome?

Answer 23

Pain
Paraesthesia
Pallor
Paralysis
Pulselessness

Question 24

What is the superior attachment of the extensor compartment of the forearm muscles?

Answer 24

Lateral epicondyle

Question 25

Name the branch from the median nerve which supplies the deep flexor compartment of the forearm?

Answer 25

Anterior interrousus nerve