Forearm Anatomy

Aka: Forearm Anatomy, Forearm

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II. Anatomy: Bones

  1. Function
    1. Forearm rotation primarily involves radius rotating around the ulna (which is fixed due to olecranon)
      1. Radius and ulna are connected midshaft by an interosseous membrane
    2. Forearm is a ring structure of 2 bones attached at each end (elbow and DRUJ at wrist)
      1. One Fracture of the ring, makes a second Fracture or dislocation more likely
      2. Fracture dislocations include Galeazzi Fracture, Monteggia Fracture
  2. Distal Radioulnar Joint (DRUJ)
    1. Distal Radius
    2. Distal Ulna
  3. Proximal Radio-ulnar joint (PRUJ)
    1. Radial Head
    2. Ulna's coronoid process (at radial notch)
  4. Images
    1. orthoArmForearmRadiusUlnaBonesLtAntGrayBB213.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    2. orthoArmForearmRadiusUlnaBonesLtPostGrayBB214.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    3. orthoAnteriorBoneForearm.jpgAlso available as a Poster size image. See printing instructions and image restrictions.
    4. orthoPosteriorBoneForearm.jpgAlso available as a Poster size image. See printing instructions and image restrictions.

III. Anatomy: Muscles

  1. Dorsal Forearm (innervated by Radial Nerve)
    1. Wrist and finger extensor Muscles
    2. Wrist supinator Muscles
  2. Volar or Palmar Forearm (innervated by the ulnar and Median Nerves)
    1. Wrist and finger flexor Muscles
    2. Wrist pronator Muscles
  3. Images
    1. orthoArmForearmMusclesLtSuperficialGrayBB414.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    2. orthoArmForearmMusclesLtDeepGrayBB415.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    3. orthoArmForearmMusclesLtSuperficialGrayBB418.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    4. orthoArmForearmMusclesLtDeepGrayBB419.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    5. orthoArmForearmMusclesXsGrayBB417.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    6. orthoArmForearmDistalXsGrayBB421.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    7. ortho_forearm_supinatorsPronators.png

IV. Anatomy: Vessels

  1. See Vascular Anatomy of the Forearm
  2. General
    1. Radial and ulnar arteries course over the volar Forearm
  3. Images: Artery
    1. orthoArmForearmArteryGrayBB527.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    2. orthoArmForearmArteryDeepGrayBB528.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    3. orthoArmForearmPostArteryDeepGrayBB529.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    4. orthoArmCvAntArteryGrayBB1235.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  4. Images: Vein
    1. orthoArmAntVeinGrayBB574.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

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