The combined actions of the tibialis anterior include which?

• A. Evert the foot and plantar flex the ankle
• B. Invert the foot and dorsiflex the ankle
• C. Flex the knee and invert the foot
• D. Extend the knee and dorsiflex the ankle

Answer: (B)

The tibialis anterior sits in the front of the lower leg and its tendon crosses to the medial side of the foot. When it contracts, it lifts the foot upward (dorsiflexion) and turns the sole inward (inversion). These actions together describe how the muscle moves the ankle and foot toward a neutral or slightly raised, inward-turned position, such as when you walk to clear the toes and maintain balance. It does not plantarflex the ankle (that’s done by the calf muscles), it doesn’t evert the foot (that’s mainly the job of the fibularis muscles), and it isn’t responsible for knee flexion or extension. So the combined actions are inversion of the foot and dorsiflexion of the ankle.