Bones of the Upper Extremity
The Upper Limb
• The “Arm” bone is called the Humerus, the
largest, longest bone of the upper limb.
• The “Forearm” has two parallel long bones,
called the Radius and the Ulna.
• The “Hand” contains:
– 8 “wrist” bones or Carpals
– 5 “hand” bones or Metacarpals
– 14 “finger” bones or Phalanges
The Humerus
Radius and Ulna
Carpals
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Scaphoid/Navicular
Lunate
Triquetral
Pisiform
These bones articulate
with the radius and ulna
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Trapezium
Trapezoid
Capitate
Hamate
These bones articulate
with the metacarpals
Metacarpals
• Form the palm of your hand
• Are numbered 1-5
• Each metacarpal has a:
– Base= proximal end, articulates with carpals
– Shaft= middle portion
– Head= distal end, form your knuckles
Phalanges
• Forms your fingers
• Each finger, except for the thumb, has three
phalanges
– Proximal, middle, and distal
• Each one is numbered from 1-5
– #1= thumb, #2=index finger, #3=middle finger,
#4=ring finger, #5=little finger
Anterior view, Left hand