The statement "The sartorius muscle inserts on the lateral surface of the proximal tibia" is false.
Explanation:
1. The sartorius muscle is the longest muscle in the human body and is located in the thigh.
2. It originates from the anterior superior iliac spine of the pelvis.
3. It runs obliquely across the thigh and inserts on the medial surface of the upper tibia (known as the pes anserinus or "goose's foot").
4. Therefore, the sartorius muscle inserts on the medial side, not the lateral side, of the proximal tibia.
In summary, the sartorius muscle does not insert on the lateral surface of the proximal tibia; instead, it inserts on the medial surface of the upper tibia.
