the point of contra flexure is a point where
Contraflexure In a bending beam, a point is known as a point of contraflexure if it is a location at which no bending occurs. It is also known as an inflection point. In a bending moment diagram, it is the point at which the bending moment curve intersects with the zero line. In other words where the bending moment changes its sign from negative to positive or vice versa. Knowing the place of the contraflexure is especially useful when designing reinforced concrete or structural steel beams and also for designing bridges.
Distal radioulnar articulation The function of the radioulnar joint is to lift and maneuver weight load from the distal radioulnar joint to be distributed across the forearmâ€™s radius and ulna as a load-bearing joint.[1] Supination of the radioulnar joint can move from 0 degrees neutral to approximately 80-90 degrees where Pronation of the Radioulnar Joint can move from 0 degrees neutral to approximately 70-90 degrees.[2] Supination (palms facing up) vs. pronation (palms facing down). Muscles that contribute to function are all supinator (Biceps Brachii, Brachioradialis, and Supinator) and pronator muscles (Brachioradialis, Pronator Quadratus, and Pronator Teres).