Elbow, forearm and wrist Flashcards Preview

Y2 LCRS2- Limbs Anatomy - Laz > Elbow, forearm and wrist > Flashcards

Flashcards in Elbow, forearm and wrist Deck (58)
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1

Name the carpal bones.

1st row – scaphoid, lunate, triquetrum, pisiform
2nd row – hamate, capitate, trapezoid, trapezium

2

What are the two articular surfaces of the distal humerus and what do they articulate with?

Capitulum – articulates with the head of the radius
Trochlea – articulates with the head of the ulna

3

What is the importance of the epicondyles of the humerus?

They are important sites of attachment of forearm muscles

4

Which fossae are present on the anterior side of the distal humerus?

Radial fossa
Coranoid fossa (the coranoid process of the ulna slots in here when the elbow is flexed)

5

Which fossa is present on the posterior side of the distal humerus?

Olecranon fossa – the olecranon process of the ulna slots in here when the elbow is extended

6

Where are tuberosities found near the elbow joint?

Radial tuberosity
Ulnar tuberosity

7

What are the two ridges running down the anterior and posterior of the radius?

Anterior oblique line
Posterior oblique line

8

What does the distal end of the ulna articulate with

An articular disc (not with carpal bones)

9

What does the distal end of the radius articulate with?

Scaphoid and lunate

10

What separates the anterior and posterior compartments of the forearm?

Interosseous membrane

11

Which carpal bone is a sesamoid bone and which muscle tendon is it enclosed in?

Pisiform
It is within the flexor carpi ulnaris tendon

12

What is the distal attachment of biceps brachii?

Radial tuberosity

13

What is the distal attachment of brachialis?

Coronoid process of ulna

14

What is the distal attachment of triceps?

Olecranon process

15

Which compartment are the pronators and supinators in?

Pronators – anterior
Supinators – posterior

16

Which muscles are in the superficial anterior compartment of the forearm?

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis
Flexor carpi ulnaris

17

Which muscles are in the deep anterior compartment of the forearm?

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

18

What is the common flexor origin?

Medial epicondyle of the humerus – this is where most of the anterior compartment muscles (particularly the superficial muscles) originate

19

Which of the superficial anterior compartment muscles do not cross the wrist?

Pronator teres

20

Describe the attachments of pronator quadratus.

It is attached between the distal ends of ulna and radius

21

What forms the roof of the carpal tunnel?

Flexor retinaculum

22

Which tendon is continuous with the palmar aponeurosis?

Palmaris longus tendon
NOTE: palmaris longus tendon isn’t present in everyone and before it spreads to form the palmar aponeurosis, it is attached to the flexor retinaculum

23

Name all the muscles in the extensor compartment of the forearm.

Muscles that move the wrist:
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor carpi ulnaris
Muscles that move the fingers:
Extensor indicis
Extensor digitorum
Extensor digiti minimi
Muscles that move the thumb:
Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis
Others:
Brachioradialis
Supinator

24

Where is the common extensor origin?

Lateral epicondyle of the humerus

25

What can be palpated in the anatomical snuffbox?

Scaphoid (this is often fractured when trying to break a fall)

26

Which tendons mark the anatomical snuffbox?

Lateral – Extensor Pollicis Brevis + Abductor Pollicis Longus
Medially – Extensor Pollicis Longus

27

Which blood vessel is present in the anatomical snuffbox?

Branch of the radial artery

28

What does the head of the radius articulate with?

Capitulum

29

What are the main ligaments found at the elbow joint?

Radial collateral ligament
Ulnar collateral ligament
Anular ligament

30

What are the three parts of the ulnar collateral ligament?

Anterior band
Posterior band
Oblique band