Hadith 1

z’. It is impossible for the cerebral nature and to its betterment. And ‘Al-Zard’ is the place from the two sides of the middle abdomen, extended at times and contracted at other (times), like the worm, and it is named with it just as this abdomen has been named, because by its extending, it elongates and aligns with it, and with its contraction, it transverses and releases it. And the first movement is the contraction, the refuse is pushed by it, and the second movement, the relaxation with it delivers the images of the realisations to the memory strength by a Determination of the Mighty, the Wise. Then, He-azwj the Exalted, has Wrapped the brain with two thin, soft membranes adjacent to it and mixed in places, and thick and solid above it, adjoining the cranium, and it has many places in it, and it is perforated with many holes in two places at the bone, like a filter. And the bone that is in the palate due to a rush of residue, and from it the ileum rami ascends from the sutures of the cranium to the outer part. It is withdrawn from the brain and its weight is lifted from it, then a membrane is woven from those branches over the outer surface of the cranium. The forebrain and hindbrain are also mediated by a gentle diaphragm. The soft part is obscured from contact with the sclera, and under the brain between the thickened membrane and the bone tissues similar to the many nets that are thrown at each other. It comes from the ascending arteries to the head from the heart and liver, and two veins come out of it and enter the hard membrane and connect to the brain. Rather, the mesh is spread under the brain so that the arterial blood and soul cool in it, so that it resembles the mood of the brain after maturation, then it is gradually disposed of to the brain and the private parts, which lie between the branches of these arteries, stuffed with glandular flesh so as not to remain empty and for those branches to depend on it and remain in their places. As for the nerves that emanate from the brain, they are seven pairs, the first of which originates from the front of the brain and enters the eye, giving it the sense of sight through the mediation of the visual force, and these two nerves are hollow. And when they originate from the brain and are a little far from it, they are connected, and the hole of each of them leads to its companion, then they also separate while they are still inside the cranium, then they come out and each one of them comes to the eye which from his side. The second pair arises from behind the origin of the first and emerges from the cranium in the hole at the bottom of the eye and separates in the muscle of the eye so that its movements are formed. And the third originates from behind the second so that the front abdomen ends to the second abdomen and mixes with the fourth pair that follows it and then separates from it. It is divided into four parts, one of which goes down to the abdomen below the veil, and the rest of it disperses in places on the face and nose, and some of them are related to the pair which comes after it. The fourth originates from behind the third origins and separates in the palate, giving it a special sense of its own. And the fifth is partly the sense of hearing and partly the movement of the muscles that move the cheek. And the sixth, part of it reaches the throat and tongue, and part of it reaches the muscle in the side of the shoulder and what is around it, and part of it descends from the neck and branches through it as it passes, connecting to the muscles of the throat. When it reaches the chest, it also splits, so some of it comes back up until it connects with the muscles of the throat, and some of it separates in the covering of the heart, lung, esophagus, and what surrounds them, and the second one passes, which is the largest, until the veil penetrates and connects to the mouth of the stomach, most of