Which action is performed by the Tibialis anterior?

• A. Ankle plantarflexion
• B. Hip flexion
• C. Ankle dorsiflexion
• D. Knee extension

Answer: (C)

The Tibialis anterior is the main muscle that lifts the front of the foot, producing ankle dorsiflexion. It runs along the front of the leg and attaches to the top of the foot, allowing you to pull the foot upward toward the shin. This action is essential for clearing the toes during the swing phase of walking and for controlled foot placement after heel strike. Plantarflexion, the action of pointing the toes downward, is done mainly by the gastrocnemius and soleus; hip flexion involves muscles higher up the leg and pelvis; knee extension is performed by the quadriceps. So the Tibialis anterior specifically carries out ankle dorsiflexion.