ABSTRACT
Page 109 through the whole body. I The five kinds of nerves possess five appellations which distinguish each from the other, and these are they: Wartde, the ARTERIAL VEINS, geyadhC, the NERVES, sherycme, the ARTERIES, asare, the LIGAMENTS, and yathre, the TENDONS. Now these five kinds are distinct each from the other, not only in respect of their natural composition, and their formation, and their setting, but also in respect of their beginnings and the places whence they derive their source. Now we are in the habit of calling ARTERIAL VEINS those
which have the beginning of their exit in the liver, and their natural formation is like that of a pipe, and they are filled with the blood which goeth up from the liver to the whole body. And we call ARTERIES those which have their source in the heart, and they are divided and radiate from thence through the whole body. They also are of tubular formation, and they are filled with thin, refined blood, and they are moved at all times with a motion of dilatation and contraction by the heart. And we call NERVES those which have many exits from the spinal cord, and they also split up and radiate in all directions throughout the body. In them is [located] the whole power of sensation. Now these (i.e., the LIGAMENTS) are simple, after the manner of the nerves, but they are different from them, because their nature is harder than that of the nerves, and because I also there is no sense of feeling in them, Fol. 53b. and because their places of exit are not from the brain (ml'tklu1), nor from the brain of the head, nor from the spinal cord, but they are in the joints, and they go forth from the bones, and they bind together the joints, and they also support that other bone which is below them. Therefore are they called LIGA· MENTS, because they tie together the joints. Now the TENDONS also partake of the nature of the ligaments and the nerves, and they are in the majority of cases closely attached to the muscles, and they extend in all directions and are like very fine filaments. Therefore, since they have in their composition a portion of the nature of the nerves, there is in them the sense of feeling; I but inasmuch as, on the other hand, they partake Page uo of the nature of the ligaments, the sense of feeling in them is slight.
