Wrist and Hand Osteology

Question 1

Bones of the wrist and hand

Answer 1

Distal Radius (Radial Styloid)
Head of Ulna and Ulnar Styloid
8 Carpal Bones
5 Metacarpals (base, shaft and head)
14 Phalanges – (proximal, middle, distal rows)
Thumb (distal and proximal phalanges – only 2)

Question 2

Distal End of Radius

Answer 2

• Radial styloid process
• Ulnar notch of radius
• Scaphoid facet
• Lunar facet

Question 3

Distal End of Ulna

Answer 3

• Head of Ulna
• Ulnar styloid process
• Articular disc attachment

Question 4

The Carpal Bones

Answer 4

• 8 bones
• Arranged around the capitate

Key points
* Scaphoid has a tubercle
which is the insertion for
blood vessels

• Pisiform is a small sesamoid
  bone found in flexor carpi
  ulnaris
• Hamate has a hook

Question 5

Carpal Bones

Answer 5

PROXIMAL ROW AND DISTAL
ROW

Proximal Row (Radial to Ulnar)
* Scaphoid > Lunate >
Triquetrum > Pisiform

Distal Row (Radial to Ulnar)
* Trapezium (thumb) > Trapezoid
> Capitate > Hamate

Some Lovers Try Positions That They Cannot Handle

Question 6

Ligaments of hand and wrist

Answer 6

• Complex arrangement of ligaments
• There to stabilize and support
  movements
• Lock carpal bones when weight
  bearing

Question 7

Ligaments & Retinacula

Answer 7

• Flexor Retinaculum (Palmar)
• This creates the “carpal tunnel”
• Borders are scaphoid, trapezium,
  hamate and pisiform
• Extensor Retinaculum (Dorsal)
• Ulnar collateral ligament
• Radial collateral ligament

Question 8

Wrist Collateral Ligaments

Answer 8

Ulnar collateral
* Origin: Ulnar styloid
* Insertion: Pisiform & Triquetrum

Radial Collateral
* Origin: Radial Styloid
* Insertion: Scaphoid

Question 9

Ligament slide 29 more info including carpal tunnel

Question 10

Arches of hand

Answer 10

see image on the ppt

Distal
Longitudinal
Oblique