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CLINICAL ANATOMY MCPHS - LOWER EXTREMITY 2 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

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CLINICAL ANATOMY MCPHS - LOWER EXTREMITY 2 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED What are the two branches of the sacral plexus? Common peroneal (fibular) nerve Tibial nerve Describe the pathway of the common peroneal (fibular) nerve. Sciatic nerve -> common peroneal ...

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  • November 2, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
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  • clinical anatomy mcphs lower extremity 2 exam qu

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CLINICAL ANATOMY MCPHS - LOWER EXTREMITY 2

EXAM QUESTIONS AND ANSWERS WITH COMPLETE

SOLUTIONS VERIFIED

What are the two branches of the sacral plexus?


Common peroneal (fibular) nerve

Tibial nerve


Describe the pathway of the common peroneal (fibular) nerve.


Sciatic nerve -> common peroneal -> wraps around head of fibula -> divides into superficial peroneal

nerve and deep peroneal nerve


What region does the superficial peroneal nerve supply?


Fibularis longus/brevis and skin of distal 1/3 of anterior leg/dorsal foot


What region does the deep peroneal nerve supply?


Anterior leg muscles, dorsum of web of feet


What injuries frequently result in common peroneal nerve damage?


Fibular head fractures, direct blows to the lateral leg


What region does the tibial nerve supply?


Posterior leg muscles, knee, and sensation on the postereolateral leg/plantar foot


What are the two branches of the tibial nerve?

,Medial plantar nerve

Lateral plantar nerve


What region does the medial plantar nerve supply?


Muscles and sensation along medial plantar foot


What region does the lateral plantar nerve supply?


Muscles and sensation along lateral plantar foot


Where does Morton's neuroma often develop?


In interdigital nerves in anastomoses between the medial and lateral plantar nerves


What three major nerves provide cutaneous sensation to the leg?


Saphenous nerve (off femoral nerve)

Sural nerve (off sciatic nerve)

Superficial branch of peroneal nerve


What cutaneous region is innervated by the saphenous nerve?


Medial surfaces of leg and foot


What cutaneous region is innervated by the sural nerve?


Posterior leg regions


What two major nerves (branches of the peroneal nerve) supply the dorsal foot?


Superficial peroneal - majority of dorsum

Deep peroneal - web of the foot (1st interdigital cleft)


What two major nerves (branches of tibial nerve) supply the plantar foot?

, Medial plantar nerve - medial plantar foot

Lateral plantar nerve - lateral plantar foot


Describe the path of blood vessels from the femoral artery to the dorsalis pedis arerty.


Femoral artery -> adductor canal -> popliteal artery -> popliteal fossa -> branches into anterior and

posterior tibial arteries -> anterior tibial artery descends anterior to interosseus membrane -> terminates

as dorsalis pedis and anastomoses with plantar arch


What is the clinical significance of the dorsalis pedis artery?


Point of palpation for the dorsalis pedis pulse


Describe the path of blood vessels from the femoral artery to the plantar arch.


Femoral artery -> adductor canal -> popliteal artery -> popliteal fossa -> branches into anterior and

posterior tibial arteries -> posterior tibial artery descends posterior to interosseus membrane ->

peroneal artery branches off at 1/3 of the way down and travels posterior to the lateral malleolus ->

posterior tibial continues down posterior to medial malleolus -> divides into medial and lateral plantar

arteries -> lateral artery forms plantar arch and anastomoses with dorsalis pedis


Where can you palpate the peroneal and posterior tibial arteries?


Malleolus (peroneal = lateral, posterior tibial = medial)


What is the weight bearing bone of the lower leg?


Tibia


What is a common clinical pathology of the tibia?


Stress fractures

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