Elbow Anatomy

Aka: Elbow Anatomy, Elbow

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II. Physiology

  1. Elbow is a hinged joint with the ability to pronate and supinate

III. Anatomy: Bones and Ligaments

  1. orthoAnteriorBoneForearm.jpg Also available as a Poster size image. See printing instructions and image restrictions.
  2. orthoPosteriorBoneForearm.jpg Also available as a Poster size image. See printing instructions and image restrictions.
  3. orthoArmElbowProximalUlnaBoneGrayBB212.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  4. orthoArmElbowJointGrayBB329.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  5. orthoArmElbowJointGrayBB330.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  6. orthoArmElbowJointGrayBB331.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  7. orthoArmElbowJointGrayBB332.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  8. orthoArmElbowJointGrayBB333.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

IV. Anatomy: Muscles

  1. orthoArmElbowMuscleSupinatorGrayBB420.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

V. Anatomy: Landmarks

  1. Landmarks form triangle (Elbow at 90 degrees)
    1. Olecranon
    2. Lateral epicondyle
    3. Medial epicondyle

VI. Anatomy: Bone

  1. Humerus
    1. Widens distally forming lateral and medial epicondyles
  2. Radial Head
    1. Articulates with capitellum (at lateral epicondyle)
    2. Articulates with lateral ulna
    3. Held in position by orbicular ligament
    4. Easily palpable near lateral epicondyle
  3. Ulna
    1. Articulates with Trochlea (at Medial epicondyle)
  4. Epicondyles
    1. Adjacent to humeral condyles
    2. Provides ForearmMuscle insertions
      1. Flexor-pronator Muscles attach to medial epicondyle
      2. Extensor-Supinators attach to lateral epicondyle

VII. Anatomy: Soft tissue

  1. Muscle insertions
    1. Triceps attaches to Olecranon posteriorly
    2. Biceps and brachialis attach to radius and ulna
    3. Pronators and Supinators Mnemonic
      1. MFP: medial (epicondyle) flexors and pronators
      2. LES: lateral (epicondyle) extensors and supinators
  2. Collateral Ligaments
    1. Medial and Lateral collateral ligaments add stability

VIII. Anatomy: Nerves

  1. Median Nerve
    1. Deep in antecubital fossa
    2. Medial to biceps
  2. Radial Nerve
    1. Lateral to biceps and brachialis Muscles
  3. Ulnar Nerve
    1. Posterior to medial epicondyle
    2. In groove between medial epicondyle and Olecranon
    3. Superficial, and vulnerable to injury

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