United States or Serbia ? Vote for the TOP Country of the Week !
I heard you intoning as I came up the hill?" Her eyes were soft and luminous and her voice unsteady. I am afraid Doctor McCall's eyes were warmer in their admiration than they should have been under the circumstances. Why should she not tell him? She repeated it. She had been chattering for two hours on cervical, dorsal and lumbar vertebrae, without stopping to take breath.
Glover speaks of an extraordinary deformity of the chest with lateral curvature of the spine, in which the diameter from the pit of the stomach to the spinal integument was only 5 1/2 inches. Supernumerary ribs are not at all uncommon in man, nearly every medical museum having some examples. Cervical ribs are not rare.
Furthermore, under ordinary circumstances, Man has seven vertebrae in his neck, which are called 'cervical'; twelve succeed these, bearing ribs and forming the upper part of the back, whence they are termed 'dorsal'; five lie in the loins, bearing no distinct, or free, ribs, and are called 'lumbar'; five, united together into a great bone, excavated in front, solidly wedged in between the hip bones, to form the back of the pelvis, and known by the name of the 'sacrum', succeed these; and finally, three or four little more or less movable bones, so small as to be insignificant, constitute the 'coccyx' or rudimentary tail.
When hyperacidity of the vaginal secretion is present, it is probable that the fertilizing element is at once rendered inert; but should some of the spermatozoa succeed in reaching the interior of the cervical canal, the increased alkalinity of the secretion there would in all probability put an end to all further progress.
I have also pleased myself by making a special group of the six radiating muscles which diverge from the spine of the axis, or second cervical vertebra, and by giving to it the name stella musculosa nuchaee. But this scanty catalogue is only an evidence that one may teach long and see little that has not been noted by those who have gone before him.
The membranes, which, in their continuation, inclose the spinal marrow, were so tough that we found great difficulty in cutting through them, and we observed this to be the cause of the tendinous texture of the cervical nerves. The marrow itself had acquired such solidity as to elude the pressure of our fingers, it resisted as a callous body, and could not be bruised.
This is the sounding-board resonance of the bones of the head and chest. To secure this, the most important reinforcement of the tone, the larynx must be firmly held in a fixed position against the backbone, at the fifth cervical vertebra. All theories as to the registers of the voice, derived from laryngoscopic observation, are completely erroneous.
Thus, in sleeping dogs, after the spinal cord has been divided in the dorsal region, reflexes can be more easily evoked from the lumbar than from the cervical cord, because the former is freed from the inhibitory control of the brain. The strength of stimulus necessary to pass the threshold of consciousness and to produce an awakening has been measured in various ways.
The conditions most likely to be mistaken for it are a soft, rapidly growing sarcoma, and a normal artery raised on a cervical rib. On account of the relations of the artery and of its branches, treatment is attended with greater difficulty and danger in subclavian than in almost any other form of external aneurysm.
The first and second cervical vertebræ, known as the atlas and the axis, are specially modified to form a support for the head and provide for its movements. The next twelve vertebræ, in order below the cervical, are known as the thoracic vertebræ. They form the back part of the framework of the thorax and have little freedom of motion.
Word Of The Day