<s>[INST] context: Anatomical Snuff Box - BDC4th/ Vol. 1130
♦ It is a triangular depression in lateral side of wrist seen best when thumb is extended
♦ Boundaries
● Anterior - Tendon of abductor Pollicis lonus Tendon of extensor Pollicis brevis
● Posterior - Tendon of extensor pollids iongus
● Above
♦ Styloid process of radius
♦ Floor – ScaphoidQ & trapezium bone
♦ Crossed by radial A Anatomical Snuff Box – snell’s 8th/533-35
♦ It is a depression in the skin that lies distal to styloid process of radius.
♦ Boundaries
● Medial
● Tendon of Extensor pollicis longus
● Lateral
● Tendon of abductor pollicis longus
● Tendon of Extensor pollicis brevis
♦ Floor
● Proximally-styloid process of radius
● Distally-base of rst metacarpal bone of thumb
♦ B/w these bones , beneath the oor lies the scaphoid & the trapezium (felt but not identiable)
♦ Radial Artery - Can be palpated
♦ Cephalic vein - Can also someti mes be recognised crossing the box as it ascends the forearm Mnemonics Floor -
FiRST Fi- First Metacarpal bone R- Radial Styloid S-Scaphoid bone T- Trapezium Contents - VAN V- Cephalic vein A - Radial artery N - Radial Nerve (cutaneous Branch)
Clinical signicance of anatomical snuff box:
• The pulsations of radial artery can be felt in the anatomical box.
• The tenderness in the anatomical box indicates fracture of scaphoid bone.
• The cephalic vein at this site is often used for giving intravenous uids.
• The supercial branches of the radial nerve can be rolled over the tendon of extensor pollicis longus.
Anatomical Snuff Box Anatomical Snuffbox is a triangular depression on the lateral aspect of wrist immediately distal to the radial styloid process,
that becomes prominent when thumb is fully extended Boundaries Floor Contents Lateral /Anterior wall
● Abductor Pollicis longus (Radially)
● Extensor Pollicis Brevis (Medially') Medial /Posterior wall
● Extensor Pollicis
● Radial styloid
● Scaphoid (smooth convex articular surface)
● Trapezium
● Base of First Metacarpal
● Cephalic vein
● Radial artery
● Supercial radial nerve [/INST] question: Contents of anatomical snuff box are
(A)Radial Artery
(B)Tendon of Abductor Poilicis longus
(C)Tendon of extensor poilicis brevis
(D)Scaphoid bone
(E)Superficial cutaneous branch of radial nerve | options: A: AE B: BC C: BA D: DE | answer: A </s>