Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 32 On the Patella

The use of the patella 15

The patella is given to humans and the animals I have just mentioned so the knee joint may be more dependably extended forward into an angle and straightened only into a straight line from an angular flexion. The patella is also particularly responsible for preventing the femur from dislocating forward out of the depressions of the tibia in flexion of the lower leg. Those whose patella has been removed from its place, or has been accidentally broken into two parts and ascends much higher than the lower heads of the femur [condylus medialis, condylus lateralis] (E, F in fig. 2, ch. 30), particularly teach us this use. 16 For they flex the tibia very weakly and go down steep places and steps with the greatest peril because the femur is always slipping forward when there is no strength in the knee. 17



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 32 On the Patella