Hadith 1

t very close, joined by four ligaments, and because of the looseness, it is frequently subjected to dislocation. Rather, it was made loose for the smooth movement of the movement in all directions, with no need for the continuity of this movement and its abundance in order to fear the violation of the ligaments or their dislocation. Rather, the humerus in most cases is not moving and the rest of the hand is moving. As for its lower end, it has two adjoining appendages attached to it. The one that follows the medial side of them is longer and narrower and has no joint with another bone, and nothing is connected to it, but it is a protection for the veins and nerves that come to the hand. And the other that follows the lateral side by which the elbow joint is completed, and between these two appendages a notch similar to a pulley notch, at its end, two pits in front and behind are called two lintels. And the other, which is the largest, is lowered and is not rounded, but it is like a straight wall, if in it the head of the forearm bone moves to the lateral side and reaches it and stands. As for the forearm, it is composed of two bones attached to each other in length, and they are called the ulna, and the superior ulna that follows the thumb is more precise because it is portable and is called the upper ulna, and the inferior ulna that follows the pinkie is thicker because it is bearing, and it is called the lower ulna, and its entirety is called a cubit (forearm). At the top, the movement of the forearm is twisting and lying down, and for this reason it creates a crooked position as if it were taking from the medial side and slightly deviated to the lateral aspect to improve its readiness for torsional movement. And at the bottom, the movement of the forearm is towards contraction and relaxation, and for this reason, it was created straight to be more suitable for them, and the middle of each of them was narrowed, as it suffices with the thick muscles that surround it from the heavy weight, and their ends are thickened due to their need for a large number of connections between them due to the large number of clashing and violent clashes during their movements of the joints and bring them closer to meat and muscle. And the upper ulna at its end is a well-groomed fovea with a condyle of the lateral ends of the humerus, and connected to it by ligaments, and its rotation in that fovea is under the flat and torsion movement. As for the lower ulna, it has two appendages between them, a notch that reconciles the incision on the tip of the humerus, and from these it heals the elbow joint. If the incision moves behind and under the extension of the hand, and if the parietal incision intercepts the fovea that retains the apex, it locks it and prevents it from extending further, so the humerus and forearm stop straightening. And if one humerus moves over the other to the front and above, the hand is clenched until the forearm touches the humerus from the medial side and the foreleg, and the two ends of the ulna from below come together as one thing, and a wide dimple occurs in them, most of which are common in the lower ulna, and what separates from the ulna remains convex, it is smoothed to keep out of reach of pests. As for the wrist and the comb, the wrist is made up of eight rounded bones stacked in two rows, and they are solid, brainless, dome-shaped bones that heal from their meeting in a conformation with what the wrist should be. The metacarpus is composed of four bones connected to the largest of the wrist by binding ligaments, and the upper row of the wrist, which is next to the forearm, has three securely jointed bones. Its bones are finer, then its heads that follow the forearm are finer, more well-groomed and connected, as if they were one, and its heads that follow the lower row are wider, less well-groomed and more connected, and the lower row is four bo