Stephen J. Schueler, M.D.

Overview Underlying Cause Anatomy

Hand Numbness (unilateral) Anatomy

To better understand hand numbness (unilateral), it helps to understand the anatomy of the hand.

The anatomy of the hand includes:

  • Bones:
    • Phalanges or finger bones (14)
    • Metacarpal bones:
    • Articulate with the phalanges (5)
    • Carpal bones:
    • Articulate with the wrist (8)
  • Blood vessels
  • Nerves:
    • Carry information to and from the brain
  • Ligaments:
    • Strong bands that hold the joints together
  • Tendons:
    • Strong bands that attach muscles to bones.
    • When a muscle tightens, the tendon pulls on a bone causing an area to move.
  • Muscles:
    • Cause movement by pulling on tendons.
  • Skin and nails

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