Spina

“ The term spina bifida occulta is applied to a condition in which there is no protrusion of the contents of the vertebral canal, although the vertebral arches are deficient. The skin over the gap is often puckered and adherent, and is frequently covered with a growth of coarse hair. ”

“ The Spine, Spinal or Vertebral Column, chine or backbone in man consists of a number of superimposed bones which are named vertebrae, because they can move or turn somewhat on Spine
each other. It lies in the middle of the back of the neck and trunk; has the cranium at its summit; the ribs at its sides, which in their turn support the upper limbs ; whilst the pelvis, with the lower limbs, is jointed to its lower end. ”

“ 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. ”

“ The spinal column is peculiarly adapted, with its strong ligaments, its cartilage cushions, its perfect flexibility and flexuousness, to withstand jars and shocks. Yet the spine is the door by which disease enters the organism. ”

“ The spinal cord, as we have seen, is a mass of nervous substance continuous with the brain; from the spinal cord nearly all the nerves of the body are given off; those nerves whose branches go to the biceps muscle in the arm leave the spinal cord somewhere in the neck. ”

“ The spinal nerves are those nerves which arise from the sides of the spinal cord. They differ from the cranial nerves not only in their origin outside the cranium, but also in that each spinal nerve arises by two roots which spring from the spinal cord near the dorsal and ventral surfaces. Each root passes through a foramen in the cartilaginous wall of the neural canal, the ventral a little anterior to the dorsal, after which they unite to form the spinal nerve. ”

“ By the President of the United States of America
A Proclamation
Spina bifida strikes one to two of every one thousand babies born in the United States. It is the most common crippler of newborns. When this disease occurs, the baby's spinal cord forms abnormally and the arches of the vertebrae, the bones that surround the cord, fail to develop. The spinal cord or its protective tissue may be displaced outside the spinal canal. Nerves supplying the legs, bladder, and bowel are incompletely developed or damaged. ”

“ 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. ”

“ As near as I can make out, the effusion of blood within the spinal canal has been safely absorbed, or nearly so. There seems to be no displacement or injury to the spinal bones; there is no wasting away of the muscles as would be the case if the spinal cord were injured. There is, I believe, good reason to hope that the loss of power in his legs is a sequel of organic conditions which have now passed away. ”

“ SPINAL CORD, in anatomy, that part of the central nervous system in man which lies in the spinal canal formed by the vertebrae, and reaches from the foramen magnum to the lower margin of the first lumbar vertebra. It is about 18 in. long, and only occupies the upper two-thirds of the spinal canal. The cord is protected by the same three membranes which surround the brain. Outside is the dura mater, which differs from that of the brain in not forming a periosteum not to the bones, in sending no processes inward, and in having no blood sinuses enclosed within its walls. ”

“ Ligamentum supraspinale.—Between the tips of the spinous processes of the thoracic and lumbar vertebræ extend ligamentous fibers. They are not united to form a distinct band, and can hardly be distinguished from the numerous tendinous fibers of the supraspinous muscles. ”

“ 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 ”

“ 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. ”

“ Spinal curvature and round shoulders may be caused by rickets, eyestrain, partial deafness, improperly constructed chairs and tables, long sitting, insufficient outdoor life and physical activity, unequal strength of complementary muscles of back and chest, or of right and left sides, and by carrying always on one side.
Spinal curvature crowds the internal organs, interfering with the normal functioning of lungs, heart, blood supply, stomach, and intestines; it causes pressure upon the spinal nerves, and consequent disorders in remote parts of the body controlled by the affected nerves. ”

“ If the spinal cord is divided in the middle of the back, for example, the skin of the feet may be cut, or pinched, or burned, or wetted with vitriol, without any sensation of touch, or of pain, arising in consciousness. ”

“ 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. ”

“ A spinal tube is formed in the external skin of the back, and from this first comes a simple spinal cord without brain, such as we find to be the permanent psychic organ in the lowest type of vertebrate, the amphioxus. ”

“ The spinal nerves consist of thirty-one pairs, which branch out from the spinal cord. Each pair of nerves contains a right and left member, distributed to the right and the left side of the body respectively. ”

“ Nedošin grove resounded with music, singing. Most of the people thronged round the dance-hall and then in the lower part around the restaurant. But all paths, even the most distant ones, were crowded, mostly by young people. In a quiet nook deep in the grove Špína walked slowly, as is meet for a philosopher, completely lost in thought. ”

“ The similarity in development between the cranial and spinal nerves is especially interesting, as forming an important addition to the evidence which at present exists that the cranial nerves are only to be looked on as spinal nerves, especially modified in connexion with the changes which the anterior extremity of the body has undergone in existing vertebrates. ”

“ Along the extreme dorsal summit of the spinal cord there arises on each side a continuous outgrowth.
From each outgrowth processes corresponding in number to the muscle-plates grow downwards. These are the posterior nerve-rudiments. ”

“ 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. ”

“ When the spinal cord has been severed in the neck this scratching movement of the hind limb can be elicited with regularity as a spinal reflex by merely rubbing the skin of the side of the neck or shoulder, applying there a weak electric current to the skin. In this reflex the stimulus excites afferent nerves connected with the hairs in the skin and these convey impulses to the spinal centres in the neck or shoulder segments, and these in turn discharge impulses into nerve fibres entirely intraspinal passing backward along the cord to reach motor centres in the hind limb region. ”

“ All along the spinal column, and between each two adjoining bones, are openings on each side, through which nerves pass out to be distributed to various parts of the body.
Between the vertebræ are pads or cushions of cartilage. These act as “buffers,” and serve to give the spine strength and elasticity and to prevent friction of one bone on another. Each vertebra consists of a body, the solid central portion, and a number of projections called processes. ”

“ The Spinal Cord.—The spinal cord proceeds from the base of the brain downward about eighteen inches through a canal provided for it in the vertebræ of the spinal column. It is composed of white matter on the outside, and gray matter within. ”

“ Force applied to any body segment tends to subluxate the segmentally associated vertebra. This subluxation tends to produce disease throughout the area of distribution of the subjacent pair of spinal nerves. ”

“ A. I thank you, Isabel. Now, what is this spine, of which there is so much "complaint" now-a-days?
I. I will answer you from Paley: "The spine, or backbone, is a chain of joints of very wonderful construction. It was to be firm, yet flexible; firm, to support the erect position of the body; flexible, to allow of the bending of the the trunk in all degrees of curvature. It was further, also, to become a pipe or conduit for the safe conveyance from the brain of the most important fluid of the animal frame, that, namely, upon which all voluntary motion depends, the spinal marrow ”

“ The mass of nerve fibre which passes down within the back-bone constituting the spinal column, which is formed in two divisions equivalent to the hemispheres of the brain, gives out at each of the vertebræ or spinal joints a supply of nerve for the portion of the body contiguous. ”

“ 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. ”

“ The vertebræ, or joints of the spine, are excavated at each end in a conical cavity; the hollow thus formed between every joint and its neighbour is filled with a jelly-like substance, which is continuous through the whole spine, by means of a hole pierced through the centre of each vertebra. There is no true spinal marrow. ”

“ In Man, in consequence partly of the disposition of the articular surfaces of the vertebrae, and largely of the elastic tension of some of the fibrous bands, or ligaments, which connect these vertebrae 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. ”

“ A careful examination will discover not only the great rigidity of the spine, and as it were fusion en masse of its joints, but in these persons the bony outgrowths may be felt. Occasionally the alteration in the vertebræ by compressing the cord or its membranes, or the spinal nerves and ganglia, may produce neuralgic pains in the cervical, dorsal, lumbar, or sciatic nerves, wasting of the muscles, more or less paralysis, and even vasomotor disturbances. ”

“ From these facts it will be readily understood that a lesion occurring in any portion of one lateral half of the spinal cord of man must be followed by some or all of the above-mentioned symptoms, and that the phenomena produced by physiological experiments on animals constitute, in reality, the pathological basis of unilateral spinal paralysis in man. They will be more clearly understood by calling to mind the course of the musculo-motor, vaso-motor, and sensitive tracts in the spinal cord. ”

“ 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 spinal cord is not only the seat of reflexes whose "centres" lie wholly within the cord itself; it supplies also conducting paths for nervous reactions initiated by impulses derived from afferent spinal nerve, but involving mechanisms situate altogether headward of the cord, that is to say, in the brain. Many of these reactions affect consciousness, occasioning sensations of various kinds. In regard to the part played by spinal conduction in subserving these sensual reactions a question of practical rather than theoretical importance has been as yet the chief aim of inquiry. ”

“ As the spinal cord runs down the body, it becomes gradually smaller, as more and more branches are given off, until finally, just below the small of the back and opposite the hip bones, it breaks up by dividing into a number of large branches which go to supply the hips and lower limbs. ”