Diagram to show mechanism of fracture of the patella by muscular action. a, Line of action of quadriceps muscle; b, femur; c, tibia.
Treves, Frederick Surgical Applied Anatomy (New York, NY: Cassell and Company, LTD, 1922)
2400×2184, 649.1 KiB
1024×931, 120.2 KiB
640×582, 66.3 KiB
320×291, 24.1 KiB