Spine (anatomy)

“ The spine is a very important structure indeed. It houses the spinal cord, without which one is paralysed, without which one is useless as a human. But the spine is more important than that. Right in the centre of the spinal nerve, the spinal cord is a tube, which extends to another dimension. It is a tube upon which the force known as the Kundalini can travel when awakened. ”

“ When there is a small sub-luxation of many vertebræ together, the distortion occasions a circular flexure of the spine, and in this case some are apt to be deceived, and take it for a complete dislocation of one spine, whereas a complete dislocation of one spinal vertebra does not produce a circular but an angular flexure of the spine, which is attended with more danger. ”

“ The spine is a highly flexible column, made up of a number of bones called vertebræ, united by cartilages and ligaments, and movable in all directions by the action of the overlying muscles. In childhood the spine is most liable to yield and become weak or deformed at the neck and loins, for the neck has to support the weight of the head, and the loins that of the internal organs of the body. ”

“ The spine is, in fact, a long narrow causeway, made of large stones, set like the vertebræ of some huge animal. They form a ridge sloping off in an angle at each side, which is continued downwards with an arrangement of smaller stones, suggestive of ribs. ”

“ A neck-swing, and lying down in the day, should be occasionally used to prevent or remove any curvature of the spine. The rest as in Species 13 and 15 of this genus.
18. Spina protuberans. Protuberant spine. One of the bones of the spine swells, and rises above the rest. This is not an uncommon disease, and belongs to the innutrition of the bones, as the bone must become soft before it swells; which softness is owing to defect of the secretion of phosphorated calcareous earth. The swelling of the bone compresses a part of the brain, called the spinal marrow, within the cavity of the back-bones ”

“ A study of the spine will make clear the fact that if the cartilage between any two Dorsal vertebrae be thinned in front the bodies of the vertebrae will be closer together and the spinous processes more widely separated; the spinous process of the upper vertebra will be crowded against the one superior to it and that of the lower against the one inferior to it. ”

“ In other words, the spine is a bodily structure as old as the rock-ribbed hills. It has stood the test of time, and therefore must be regarded as the most highly perfected mechanical structure in the body. ”

“ When the spine is erect, they are of the same thickness all around. When the spine is bent sidewise, say towards the right, the elastic cushions become thinner on that side, and if the bending is decided, the edges of the spinal bones themselves will nearly touch, while the mass of elastic or india-rubber substance will be pressed over to the left side. Now suppose that one follows an occupation requiring this position of the spine. ”

“ The first of the three dorsal spines is very strong, roughened in front like a file, and hollowed out behind to receive the second much smaller spine, which, besides, has a projection in front, at its base, fitting into a notch of the first. Thus these two spines can only be raised or depressed simultaneously, in such a manner that the first cannot be forced down unless the second has been previously depressed. ”

“ Once formed, a palpation habit, right or wrong, is very hard to break. Many a teacher has expended himself uselessly in the effort to undo some technical fault acquired by the student in a blundering undirected trial.
Facts Concerning the Spine
The spinal column is composed of twenty-six segments called vertebrae, twenty-four movable and two fixed. The movable vertebrae are divided for convenience in study into three sections. There are seven Cervical vertebrae, twelve Dorsal, and five Lumbar in the normal individual. ”

“ Its strength combined with its flexibility and its perfect adjustment as a container for the central nervous system, makes it perhaps the most wonderful structure in the body outside of the brain and the spinal cord itself. While other organs and features of the body have been changed and modified to such an extent in the various species which have been evolved that they can hardly be recognized as having a common origin, yet the spine has remained substantially the same. ”

“ A canal is hollowed out of the column for the safe passage of the spinal cord. (See Fig. 50.) Projections (processes) at the back and on either side are abundant for the attachment of the muscles. The packing acts as a cushion to prevent any jar from reaching the brain when we jump or run, while the double curve of the spine also tends to disperse the force of a fall. Thus on every side the utmost caution is taken to guard that precious gem in its casket.
THE PERFECTION OF THE SPINE surpasses all human contrivances. ”

“ The upper part of the spine is often thrown out of its proper position by constant stooping of the head over books or work. This affects the elastic disks so that they grow thick at the back side and thinner at the front side by such constant pressure. ”

“ Spines slightly curved, three-sided prismatic, with two to three verticils of short curved branches. The vertical apical spine is about twice as long as the three basal spines, and connected with them by an irregular loose framework. ”

“ The complete erection of the spine means that the skull, instead of being suspended in front, is now poised upon the top of the spinal column. The field of vision is enormously enlarged, and it is possible to sweep a great extent of horizon at a moment's notice. ”

“ Of course the natural state of the spine, as the seat of a great nervous centre, affects many muscles of the body, and, on the other hand, the freedom of these muscles reacts favorably upon the spine. ”

“ In Man, in consequence partly of the disposition of the articular surfaces of the vertebra, and largely of the elastic tension of some of the fibrous bands, or ligaments, which connect these vertebræ together, the spinal column, as a whole, has an elegant S-like curvature, being convex forwards in the neck, concave in the back, convex in the loins, or lumbar region, and concave again in the sacral region; an arrangement which gives much elasticity to the whole backbone, and diminishes the jar communicated to the spine, and through it to the head, by locomotion in the erect position. ”

“ Although the backbone can bend forward or backward, or twist from side to side a little, by the little pieces of bone of which it is built up gliding and turning upon one another, it is really very stiff and rigid, so as to protect the spinal cord and prevent its being stretched or pinched. Most of the movements which we call bending the spine are really movements of other joints which connect the {213}body or head with it. When we bend our necks, for instance, we hardly bend the backbone at all, as most of the movement is made in the joint at the top of it, between it and the skull. ”

“ When we come to consider that the spinal cord, or marrow, runs down through the long, bony shaft made by the vertebrae and that the brain and spine, though connected, are bound up in one continuous bony wall and covered with this inflamed membrane, it is not difficult to understand that the thing is very hard to get at. ”

“ The spine is composed of vertebrae, and it extends from the head down to the loins. The vertebrae are all perforated, and, above, the bony portion of the head is connected with the topmost vertebrae, and is designated the 'skull'. ”

“ Now, the spine was not only to furnish the main trunk for the passage of the medullary substance from the brain, but to give out, in the course of its progress, small pipes therefrom, which, being afterwards indefinitely subdivided, might, under the name of nerves, distribute this exquisite supply to every part of the body. ”

“ Then there are the definite physiological results of maintaining an erect spine. The mechanical arrangement of the spine itself is such that if it is held erect the important nerves that radiate to all parts of the body from this central "bureau" are able more perfectly to perform their functions. ”

“ Manifestly, at the end of the spine, Nature puts out smaller spines, as arms; at the end of the arms, new spines, as hands; at the other end, she repeats the process, as legs and feet. At the top of the column she puts out another spine, which doubles or loops itself over, as a span-worm, into a ball, and forms the skull, with extremities again: the hands being now the upper jaw, the feet the lower jaw, the fingers and toes being represented this time by upper and lower teeth. This new spine is destined to high uses. It is a new man on the shoulders of the last. ”

“ We shall learn hereafter that the action of the muscles bears an important part in preserving the symmetry of the spine. Muscular strength comes from bodily activity; hence, one of the best preventives of spinal curvature is daily exercise in the open air.
5. Sprains are produced when the ligaments which bind the bones of a joint are strained, twisted, or torn from their attachments. They are quite as serious as a broken bone, and require careful attention lest they lead to a crippling for life. By premature use a sprained limb may be permanently impaired. ”

“ The use of this chair is more efficacious in straightening the spine, than simply lying down horizontally; as it not only takes off the pressure of the head and shoulders from the spine, but at the same time the inferior parts of the body contribute to draw the spine straight by their weight ”

“ I assert, therefore, that if there is ample evidence to show that the spinal centres have sensibility, when separated from the cerebral centres, such evidence can in no respect be weakened by the fact that a man with an injured spine is unconscious of impressions made below the seat of injury ”

“ At each antero-lateral angle a strong, backward-curving spine (a') complements the great dorsal thoracic spines. A pair of large crescentiform sessile eyes occur on the anterior margin just within the base of the anterior spines (pl. 25, figs. 4 and 5) . The great dorsal spines are beautifully crenulated on the outer margin by short, strong backward-curving spines.
Appendages.—The antennæ (a", fig. 5, pl. 26) are long, slender, and many-jointed; they unite with the head near the posterior end of the labrum ”

“ In some cases, the curvature of the spine assumes an extreme type, the shoulders are rounded, and the head depressed, the face approximating the sternum, so that to see an object such as a picture on a wall, the patient must turn his back to it. ”

“ Static scoliosis, for example, when one leg is shorter than the other, the pelvis is tilted down on the short side, the thoracico-lumbar spine deviates laterally to the normal side, and to restore the equilibrium of the trunk the cervico-thoracic spine deviates again in the opposite direction. ”

“ Mobility of the spine is of first importance, for in health there is motion between adjacent vertebrae. Lack of movement may be caused by muscular tension, by stretching of ligaments, or by a union of the parts due to bony deposit. ”

“ When the spines on being gently stimulated bend towards the point of stimulation, this is due to the contraction of the muscles on the side towards the point of stimulus, for if the superficial plexus of nerve-fibres be cut through so that the stimulus has to pursue a round-about course the spine will bend towards the direction from which the stimulus comes. The bending of the spines away from the stronger stimulus is likewise due to the muscles on the side towards the stimulus. ”

“ Slight curvature of the spine either backward or forward is helped most by exercises which tend to straighten the body, such as stretching up with the hands above the head. Lateral curvature of the spine, too often caused by a "hunched-up" position at the school desk, may also be corrected by exercises which tend to lengthen the spinal column. ”

“ The power of the muscles is so accurately balanced, that, provided all be in a normal condition, no difficulty is experienced in maintaining the erect attitude for a very considerable time. The spine has also natural curves, which act as springs to diminish the con­cussions which the brain would receive in walking were it not for those curves and the elasticity of the intervertebral cartilages. ”

“ There is an alternative procedure, spinal fusion—essentially welding part of the spine together so the disc can't pop. She will still hurt, and it will limit her mobility somewhat; the only advantage is that she'll be spared the agony of the disc moving out of place. ”