Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 29, 2025
Section of the cord must therefore give rise to an increased chemical movement and heat-production in the body. As already stated, this section affects very greatly the circulation, but the fever is independent of such action. The upper end of the medulla oblongata is continuous with a nervous mass which joins the two brain hemispheres together, and hence is known as the pons or bridge.
It may be seriously slowed by nervous shock, fear or sudden peripheral contractions, spasm of muscles, or convulsive contractions, or it may be stimulated to greater rapidity by nervous excitement. It may be slowed or made rapid by reflex irritations, and it may be seriously interfered with by cerebral lesions; pressure on the vagus centers in the medulla oblongata will make it very slow.
From this common centre the fibres of the brain range horizontally and upward in all directions like the branches of a tree. Development of brain fibre laterally gives a wide head, longitudinally, from the medulla oblongata to the forehead and to the occiput, a long head.
A part of the medulla oblongata, the destruction of which causes instant death. Having the appearance of glass; applied to the humor occupying the largest part of the cavity of the eyeball. The practice of operating upon living animals, for the purpose of studying some physiological process. Vocal Cords. Two elastic bands or ridges situated in the larynx; the essential parts of the organ of voice.
The gray matter is broken up into masses which serve as centers of origin for various nerves. The functions of the medulla oblongata are closely connected with the vital processes. It is a great nerve tract for transmitting sensory and motor impressions, and also the seat of a number of centers for reflex actions of the highest importance to life.
The cerebellum, or lesser brain, lies in the back of the cranium, and is covered over in man by the posterior lobe of the cerebrum. It is, at it were, astride of the back of the cerebro-spinal axis, and consists of two hemispheres joined by a central mass. On its under surface is a depression which receives the medulla oblongata.
"Broken as a man's neck is broken by hanging dislocation, really the disjointing of the medulla oblongata, if you don't mind technicalities," he said. "But I kept him living just the same. Time enough for him to repent in and get ready to go. A most interesting case. He was a criminal, too, and wanted to die; but you have to keep life going if you can, to the last inch of resistance."
This, too, is beyond the control of the will, and is brought about by the vaso-motor nerves of the sympathetic system through a reflex arrangement, the center for which is the medulla oblongata. Need of Rest. The life of the body, as has been emphasized in the preceding chapters, is subject to constant waste going on every moment, from the first breath of infancy to the last hour of old age.
On an east-bound train I went into the smoker and found Jefferson Peters, the only man with a brain west of the Wabash River who can use his cerebrum, cerebellum, and medulla oblongata at the same time. Jeff is in the line of unillegal graft. He is not to be dreaded by widows and orphans; he is a reducer of surplusage.
The medulla oblongata not growing so hard as the spinalis, was doubtless owing to its not being confined in an osseous theca, but surrounded with soft parts, which allowed it room to spread.
Word Of The Day
Others Looking