3.Rotational alignment of the trochlear component parallel to the epicondylar axis optimizes patellar tracking.25,26 Palpation of the epicondyles is difficult, particularly when using smaller incisions.
4.When we tap your, let's say your patellar tendon that causes a stretch in a muscle spindle, this sends a signal back to the sensory neuron, which activates a motor neuron in the spinal cord to cause your knee to kick up.
5.If you hit my patellar tendon with a reflex hammer, my leg is going to jerk forward, and it's going to jerk forward a lot faster and a lot more predictably than if I had to think about it myself.