Muscles Actions, Origins & Insertions Practice Test

Origin of the tibialis anterior?

Proximal fibula Lateral tibia (proximal) Medial tibia Distal tibia

Correct Answer:

Lateral tibia (proximal)

Explanation:

The tibialis anterior starts from the upper lateral surface of the tibia (proximal part) and also via the interosseous membrane between the tibia and fibula. This places the muscle on the front of the leg so its tendon runs to the foot to invert and dorsiflex the ankle. That’s why the lateral tibia in its proximal region is the correct origin. The fibula, medial tibia, or a distal tibial origin wouldn’t match how tibialis anterior is anchored and positioned.

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