Question

which of the following muscles of the lower leg is responsible for dorsiflexion and inversion of the foot at the ankle?

a.) tibialis anterior
b.) tibialis posterior
c.) soleus
d.) fibularis longus

Explanation:

Identify the target actions

Dorsiflexion (lifting the foot upward toward the shin) and inversion (turning the sole of the foot inward).

Analyze the muscle options

• Tibialis Anterior: Located in the anterior compartment of the leg; primary dorsiflexor and also inverts the foot.
• Tibialis Posterior: Located in the deep posterior compartment; plantarflexes and inverts the foot.
• Soleus: Located in the superficial posterior compartment; plantarflexes the foot.
• Fibularis Longus: Located in the lateral compartment; plantarflexes and everts the foot.

Determine the correct match

The tibialis anterior is the only muscle listed that performs both dorsiflexion and inversion of the foot.

Answer:

• a.) Tibialis Anterior (Correct answer)
• b.) Tibialis Posterior
• c.) Soleus
• d.) Fibularis Longus