Anatomical Snuffbox Flashcards Preview

ESA 2- Musculoskeletal System > Anatomical Snuffbox > Flashcards

Flashcards in Anatomical Snuffbox Deck (19):
1

What is the anatomical snuffbox?

A triangular depression

2

Where is the anatomical snuffbox found?

On the lateral aspect of the dorsum of the hand
At the level of the carpal bones

3

When is the anatomical snuffbox best seen?

When the thumb is abducted

4

What shape is the anatomical snuffbox?

Triangular

5

What are the borders of the anatomical snuffbox?

Ulnar (medial)
Radial (lateral)
Proximal

6

What forms the ulnar border of the snuffbox?

Tendon of the extensor pollicis longus

7

What forms the radial border of the snuffbox?

Tendons of the abductor pollicis longus and extensor pollicis brevis

8

What forms the proximal border of the snuffbox?

Styloid process of the radius

9

What forms the floor of the snuffbox?

Carpal bones- scaphoid and trapezium

10

What forms the roof of the anatomical snuffbox?

Skin

11

What is the main contents of the snuffbox?

Radial artery
Branch of radial nerve
Cephalic vein

12

Where does the radial artery cross?

The floor of the anatomical snuffbox, in an oblique manner

13

Where does the radial artery run?

Deep to the extensor tendons

14

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

Subcutaneously, across the roof of the snuffbox

15

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

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

16

Where does the cephalic vein cross the anatomical snuffbox?

Subcutaneously

17

What articulates in the anatomical snuffbox?

The scaphoid and radius, to form the wrist joint

18

What happens in the event of a blow to wrist?

The scaphoid takes most of the force

19

What is the symptom of a scaphoid fracture?

Localised pain in the anatomical snuffbox