Calf Anatomy

Aka: Calf Anatomy, Tibia Bone, Fibula Bone, Lower Leg Anatomy

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II. Anatomy: Bones

  1. Tibia
    1. Primary leg bone, supporting 90% of body weight
  2. Fibula
    1. Lateral lower leg, and primarily functions as the lateral ankle support
  3. Images
    1. orthoAnteriorBoneFoot.jpgAlso available as a Poster size image. See printing instructions and image restrictions.
    2. orthoPosteriorBoneFoot.jpgAlso available as a Poster size image. See printing instructions and image restrictions.
    3. AnkleAnatomyMuscleAP.gif
    4. AnkleAnatomyMusclePosterior.gif
    5. orthoLegTibFibRtAntGrayBB258.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    6. orthoLegTibFibRtPostGrayBB259.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    7. orthoLegFibulaDistalGrayBB262.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

III. Anatomy: Muscles (4 compartments)

  1. Anterior lower leg Muscles
    1. Ankle and Foot dorsiflexion
      1. Tibialis anterior Muscle
    2. Toe Dorsiflexion
      1. Extensor Digitorum longus Muscle
      2. Extensor hallucis longus Muscle
  2. Posterior leg Muscles (2 compartments: superficial and deep)
    1. Ankle and Foot Plantar Flexion (calf, superficial Muscles, except tibialis posterior)
      1. Gastronemius Muscle (and achilles tendon)
      2. Soleus Muscle
      3. Plantaris Muscle (may be absent)
      4. Tibialis Posterior Muscle (deep Muscle)
    2. Toe Plantar Flexion (deep Muscles)
      1. Flexor digitorum longus
      2. Flexor digitorum brevis
      3. Flexor hallucis longus
  3. Lateral Leg Muscles (foot eversion)
    1. Peroneus Longus Muscle
    2. Peroneus Brevis Muscles
  4. Images
    1. orthoLegCalfLandmarksGrayBB1240.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    2. orthoLegCalfAntGrayBB437.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    3. orthoLegCalfPostGrayBB438.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    4. orthoLegCalfPostDeepGrayBB439.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
    5. orthoLegCalfXsGrayBB440.gifLewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

IV. Anatomy: Nerves

  1. See Neuroanatomy of the Leg
  2. Tibial nerve
    1. Extension of the sciatic nerve, innervating the posterior leg and all of the calf Muscles
  3. Peroneal nerve
    1. Branch of the sciatic nerve, innervating the lateral and anterior lower leg

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