Anatomical Snuffbox Flashcards Preview

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Flashcards in Anatomical Snuffbox Deck (19)
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1
Q

What is the anatomical snuffbox?

A

A triangular depression

2
Q

Where is the anatomical snuffbox found?

A

On the lateral aspect of the dorsum of the hand

At the level of the carpal bones

3
Q

When is the anatomical snuffbox best seen?

A

When the thumb is abducted

4
Q

What shape is the anatomical snuffbox?

A

Triangular

5
Q

What are the borders of the anatomical snuffbox?

A

Ulnar (medial)
Radial (lateral)
Proximal

6
Q

What forms the ulnar border of the snuffbox?

A

Tendon of the extensor pollicis longus

7
Q

What forms the radial border of the snuffbox?

A

Tendons of the abductor pollicis longus and extensor pollicis brevis

8
Q

What forms the proximal border of the snuffbox?

A

Styloid process of the radius

9
Q

What forms the floor of the snuffbox?

A

Carpal bones- scaphoid and trapezium

10
Q

What forms the roof of the anatomical snuffbox?

A

Skin

11
Q

What is the main contents of the snuffbox?

A

Radial artery
Branch of radial nerve
Cephalic vein

12
Q

Where does the radial artery cross?

A

The floor of the anatomical snuffbox, in an oblique manner

13
Q

Where does the radial artery run?

A

Deep to the extensor tendons

14
Q

Where do the terminal branches of the superficial branch of the radial nerve run?

A

Subcutaneously, across the roof of the snuffbox

15
Q

What do the terminal branches of the superficial branch of the radial nerve provide?

A

Innervation to the skin of the lateral 3 1/2 digits on the dorsum of the hand, and the associated palm area

16
Q

Where does the cephalic vein cross the anatomical snuffbox?

A

Subcutaneously

17
Q

What articulates in the anatomical snuffbox?

A

The scaphoid and radius, to form the wrist joint

18
Q

What happens in the event of a blow to wrist?

A

The scaphoid takes most of the force

19
Q

What is the symptom of a scaphoid fracture?

A

Localised pain in the anatomical snuffbox