Biomechanics Terminology for the Modern Podiatrist Moments скачать в хорошем качестве

Biomechanics Terminology for the Modern Podiatrist Moments

My second lecture on biomechanics terminology (26-minutes) covers the subject of rotational forces, or moments. Moments can be either external, generated by external forces acting on the foot, such as ground reaction force, or internal moments, generated by muscle, tendon, ligament or fascial tension forces. Moments can either accelerate rotation (i.e. angular acceleration) in the direction of the moment, or decelerate rotation in the direction opposite to the direction of the applied moment. Moments acting in equal and opposite directions across a joint axis help produce joint stability. Newton's second law of motion is also used in the lecture to help explain how muscle moments, along with gravitational acceleration and ground reaction forces, help us produce the motions necessary to performs all types of sport and other weightbearing activitites. In addition, examples of moments acting across the ankle joint and subtalar joint. Muscle testing is also mentioned in regards to how muscle strength is not exactly what we are testing when clinically assessting "muscle strength" in our patients.