Which of these muscles is innervated by the lateral plantar nerve?

Question

BlackTom AI · Accepted Answer

To answer which muscle is innervated by the lateral plantar nerve, let's evaluate each option in turn and connect it to its nerve supply.
Option 1: Abductor digiti minimi m. This muscle is a classic example of a lateral plantar nerve recipient; it lies in the lateral compartment of the sole and receives its innervation from the lateral plantar nerve, aligning with the pattern that many intrinsic muscles on the pinky toe side are supplied by this nerve.
Option 2: Abductor hallucis m. This muscle is typically innervated by the medial plantar nerve, not the lateral plantar nerve, which makes this option inconsistent with the correct nerve distribution for the sole’s medial group.
Option 3: Extensor hallucis brevis m. This muscle is located on the dorsum of the foot and is innervated by the deep fibular (peroneal) nerve, not by the plantar nerves of the sole, so it does not fit the lateral plantar nerve.
Option 4: Flexor digitorum brevis m. This muscle is a primary example of a muscle innervated by the medial plantar nerve; it’s one of the main intrinsic muscles supplied by that nerve, not by the lateral plantar nerve.
Option 5: Extensor digitorum brevis m. Similar to Extensor hallucis brevis, this dorsum muscle is supplied by the deep fibular nerve, so it is not driven by the lateral plantar nerve.
In summary, among the listed muscles, the one classically innervated by the lateral plantar nerve is Abductor digiti minimi m., while the others are innervated by either the medial plantar nerve or by dorsal foot nerves (deep fibular) rather than the lateral plantar nerve.

Which of these muscles is innervated by the lateral plantar nerve?

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