I am a superficial muscle of the lower limb, arising from the head of the fibula. I insert via a long tendon under the foot on the first metatarsal. I am located in the lateral compartment of the lower leg, and my role is to plantarflex and evert the foot. Who am I?

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BlackTom AI · Accepted Answer

Question restatement: You are asked to identify a superficial muscle of the lower limb that arises from the head of the fibula, inserts via a long tendon under the foot on the first metatarsal, lies in the lateral compartment of the lower leg, and plantarflexes and everts the foot.

Option 1: fibularis longus. This option matches all the clues: it is a lateral compartment muscle that originates from the fibula (including the head), sends a long tendon that crosses under the foot to attach at the base of the first metatarsal (and the medial cuneiform), and it functions to plantarflex and evert the foot. The anatomical pathway under the foot to the first metatarsal is characteristic of the fibularis longus.

Option 2: gastrocnemius. The gastrocnemius is a superficial posterior leg muscle, not a lateral compartment muscle, and it originates from the distal femur rather than the fibula. Its primary actions are plantarflexion of the foot at the ankle and flexion of the knee, not eversion, and it does not insert on the first metatarsal. Therefore, this option does not fit most of the clues.

Option 3: soleus. The soleus is another superficial posterior leg muscle in the deep posterior compartment, also arising from the tibia and fibula but not located in the lateral compartment. Its main action is plantarflexion, but it does not originate from the head of the fibula, does not have a long tendon inserting on the first metatarsal, and it does not contribute to foot eversion. This makes it an unlikely match.

Option 4: tibialis posterior. Tibialis posterior lies in the deep posterior compartment, not the lateral compartment. It inserts mainly on the tarsal and metatarsal bones, contributes to plantarflexion and inversion (not eversion), and does not have a tendon routing under the foot to the first metatarsal. These features conflict with several clues from the question.

Summary: Among the four options, the described muscle that aligns with origin at the fibula head, a long tendon under the foot to the first metatarsal, lateral compartment location, and combined plantarflexion with eversion is the fibularis longus. The other choices fail to satisfy multiple parts of the description, either in origin, course, insertion, compartment, or action.

I am a superficial muscle of the lower limb, arising from the head of the fibula. I insert via a long tendon under the foot on the first metatarsal. I am located in the lateral compartment of the lower leg, and my role is to plantarflex and evert the foot. Who am I?

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The muscle labeled A is the [ Select ] Iliopsoas tibialis posterior Tensor Fascia Latae rectus femoris sartorius popliteus gastrocnemius gracilis , and B is the [ Select ] pectineus Iliopsoas adductor longus gracilis sartorius vastus medialis .

The muscle labeled A is the gracilis and the muscle labeled B is the [ Select ] sartorius vastus medialis gracilis semimembranosus semitendinosus vastus lateralis and the muscle labeled C is the [ Select ] gastrocnemius vastus medialis gracilis soleus popliteus anconeus

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I am a superficial muscle of the lower limb, arising from the head of the fibula. I insert via a long tendon under the foot on the first metatarsal. I am located in the lateral compartment of the lower leg, and my role is to plantarflex and evert the foot. Who am I?

View Explanation

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Similar Questions

The muscle labeled A is the [ Select ] Iliopsoas tibialis posterior Tensor Fascia Latae rectus femoris sartorius popliteus gastrocnemius gracilis , and B is the [ Select ] pectineus Iliopsoas adductor longus gracilis sartorius vastus medialis .

The muscle labeled A is the gracilis and the muscle labeled B is the [ Select ] sartorius vastus medialis gracilis semimembranosus semitendinosus vastus lateralis and the muscle labeled C is the __ [ Select ] gastrocnemius vastus medialis gracilis soleus popliteus anconeus __

All of the following cross BOTH the hip and knee joint EXCEPT:

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The muscle labeled A is the gracilis and the muscle labeled B is the [ Select ] sartorius vastus medialis gracilis semimembranosus semitendinosus vastus lateralis and the muscle labeled C is the [ Select ] gastrocnemius vastus medialis gracilis soleus popliteus anconeus