Which of the following muscles is innervated by the deep fibular nerve?

Question

BlackTom AI · Accepted Answer

We are asked which muscle is innervated by the deep fibular (peroneal) nerve.
Option 1: Flexor digitorum brevis m. — This muscle is innervated by the medial plantar nerve, a branch of the tibial nerve, not the deep fibular nerve. Therefore this option is incorrect for the question.
Option 2: Tibialis anterior m. — The tibialis anterior is a primary dorsiflexor of the foot and is innervated by the deep fibular nerve. This aligns with the nerve distribution we’re testing, making this option plausible and consistent with anatomy.
Option 3: Abductor hallucis m. — Like flexor digitorum brevis, this muscle is innervated by the medial plantar nerve, not by the deep fibular nerve, so it does not fit the asked innervation.
Option 4: Flexor digitorum longus m. — This muscle is supplied by the tibial nerve branch, specifically the tibial nerve itself via its muscular branches to the posterior compartment of the leg, not by the deep fibular nerve. Therefore, this is incorrect for the deep fibular nerve question.
Option 5: Fibularis longus m. — The fibularis (peroneus) longus is innervated by the superficial peroneal (fibular) nerve, not the deep fibular nerve. Thus, this option is also incorrect for the deep fibular nerve question.
In summary, among the listed muscles, the tibialis anterior is the one whose nerve supply matches the deep fibular nerve distribution, while the others are innervated by either the tibial nerve or the superficial peroneal/medial plantar nerves, which explains why they are not correct in this context.

Which of the following muscles is innervated by the deep fibular nerve?单项选择题

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