Q20 Tibialis Anterior

Question 1

briefly describe the position of tibialis anterior

Answer 1

anterior compartment of the leg, lateral to the anterior border of the tibia.

Question 2

give the attachments of tibialis anterior

Answer 2

proximal - upper two-thirds of the lateral surface of the tibia and adjoining part of the interosseous membrane.
distal - tendon attaches to the medial side of the medial cuneiform and base of the first metatarsal.

Question 3

state the action of the tibialis anterior muscle

Answer 3

dorsiflexes the foot at the ankle (when working with tibialis posterior) inverts the foot so the sole faces medially

Question 4

name the nerve supply to tibialis anterior

Answer 4

deep peroneal nerve L4 L5

Question 5

give one functional activity in which the tibialis anterior muscle is working

Answer 5

clears the foot from the ground in swing phase of walking. balancing on one foot