Anatomy of the Tibial Nerve
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Anatomy of the Tibial Nerve

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Questions and Answers

Where does the circumflex fibular branch terminate?

  • At the front of the knee
  • In the posterior compartment of the leg
  • Behind the inferior tibiofibular joint
  • In the region of the ankle joints (correct)

    • What is the function of the communicating branch of the peroneal artery?

  • To form an arch with a similar branch from the posterior tibial artery (correct)
  • To supply the posterior compartment of the leg
  • To reinforce the dorsalis pedis artery
  • To supply the lateral compartment of the leg

    • Which of the following branches of the peroneal artery supplies the medial malleolus?

  • Nutrient branch
  • Malleolar branch (correct)
  • Anastomotic branch
  • Calcaneal branch

    • In the lower one-third of the leg, the posterior tibial artery lies on which muscles?

    <p>Flexor digitorum longus and tibia</p> Signup and view all the answers

    What is the destination of the perforating branch of the peroneal artery?

    <p>It pierces the interosseous membrane</p> Signup and view all the answers

    What is the largest branch of the posterior tibial artery?

    <p>Peroneal artery</p> Signup and view all the answers

    What is the posterior tibial artery accompanied by in the leg?

    <p>Tibial nerve and venae comitantes</p> Signup and view all the answers

    What is the course of the peroneal artery?

    <p>It winds around the lateral side of the neck of the fibula</p> Signup and view all the answers

    What is the relation between the peroneal artery and the dorsalis pedis artery?

    <p>The peroneal artery reinforces the dorsalis pedis artery</p> Signup and view all the answers

    At the ankle, the posterior tibial artery lies directly on which structure?

    <p>Capsule of the ankle joint</p> Signup and view all the answers

    Which of the following muscles does not receive a branch from the posterior tibial artery?

    <p>Tibialis anterior</p> Signup and view all the answers

    What is the destination of the calcaneal branches of the peroneal artery?

    <p>They anastomose with other arteries in the region</p> Signup and view all the answers

    What is the origin of the peroneal artery?

    <p>It is a branch of the posterior tibial artery</p> Signup and view all the answers

    What is the direction of the nutrient artery given off to the tibia?

    <p>Obliquely towards the fibula</p> Signup and view all the answers

    In which figure is the course of the posterior tibial and peroneal arteries and the tibial nerve depicted?

    <p>Figs 9.7a and b</p> Signup and view all the answers

    What is the distance below the lower border of the popliteus where the peroneal artery begins?

    <p>2.5 cm</p> Signup and view all the answers

    What is the primary function of the Popliteus muscle?

    <p>Unlocks the knee joint by lateral rotation of the femur on the tibia prior to flexion</p> Signup and view all the answers

    Which nerve is responsible for innervating the Flexor digitorum longus muscle?

    <p>Tibial nerve</p> Signup and view all the answers

    What is the primary function of the Flexor hallucis longus muscle?

    <p>Flexes the distal phalanx of the big toe</p> Signup and view all the answers

    What is the relationship between the Tibialis posterior tendon and the medial malleolus?

    <p>The tendon passes behind the medial malleolus, grooving it</p> Signup and view all the answers

    During dissection, what muscle is reflected laterally to expose the underlying deep muscles?

    <p>Soleus</p> Signup and view all the answers

    What is the relationship between the Tibialis posterior tendon and the flexor retinaculum?

    <p>The tendon passes deep to the flexor retinaculum</p> Signup and view all the answers

    What is the primary function of the Tibialis posterior muscle?

    <p>Supports the medial longitudinal arch of the foot</p> Signup and view all the answers

    Which of the following muscles is NOT innervated by the Tibial nerve?

    <p>Gastrocnemius</p> Signup and view all the answers

    Study Notes

    Posterior Tibial Artery

    • Lies on the tibialis posterior in the upper two-thirds of the leg
    • Lies on the flexor digitorum longus and tibia in the lower one-third of the leg
    • Lies directly on the ankle joint capsule between the flexor digitorum longus and flexor hallucis longus at the ankle
    • Accompanied by two venae comitantes and the tibial nerve

    Branches

    • Peroneal artery (largest branch)
    • Muscular branches to muscles of the back of the leg
    • Nutrient artery to the tibia
    • Anastomotic branches:
      • Popliteus
      • Flexor digitorum longus
      • Flexor hallucis longus
      • Tibialis posterior

    Peroneal Artery

    • Begins 2.5 cm below the lower border of the popliteus
    • Runs obliquely towards the fibula and descends along the medial crest of the fibula
    • Accompanied by the nerve to the flexor hallucis longus
    • Branches:
      • Muscular branches to the posterior and lateral compartments
      • Nutrient artery to the fibula
      • Anastomotic branches:
        • Communicating branch (anastomoses with a similar branch from the posterior tibial artery)
        • Malleolar branch (anastomoses with other arteries over the medial malleolus)
        • Calcaneal branches (anastomose with other arteries in the region)
      • Terminal branches:
        • Medial and lateral plantar arteries (will be studied in the sole)

    Tibialis Posterior

    • Plantar flexor of ankle joint
    • Inverts foot at subtalar joint
    • Supports medial longitudinal arch of foot
    • Important relations:
      • Tendon passes behind the medial malleolus, grooving it
      • Tendon passes deep to the flexor retinaculum
      • Terminal part of the tendon supports the spring ligament

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    Description

    This quiz covers the location of the tibial nerve in the leg, including its relation to the tibialis posterior and flexor digitorum longus.

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