Further, on each side of this infundibular tube are lying the two thick masses of the crura cerebri, the strands of fibres which connect the higher brain-region proper with the lower region of the medulla oblongata and spinal cord.
It is here that pithing is done, which is almost instantly fatal, as the medulla oblongata and upper part of the spinal cord are the parts injured, and they contain the respiratory and other vital centres.
Such cause may operate upon the central ganglia whence the nerves emanate, as the vicinity of the oblongata and upper parts of the spinal cord or the coeliac ganglion and its branches, including those to the pancreas.
The letter c is placed on the restiform bodies or posterior part of the medulla oblongata of the cod.
What is called the fourth ventricle is the small space between the medulla oblongata and the cerebellum.
Beginning at the bottom of the figure, we observe the medullaoblongata rising from the spinal cord to reach the cerebrum.
As the fibres of the medulla oblongata ascend they pass between the cerebellum and the pons Varolii (bridge of Varolius) mingling with its substance.
It has been termed the "vital knot," owing to the fact that the brain may be removed and the cord injured and still the heart and lungs will continue to perform their functions, until the medulla oblongata is destroyed.
Those of the spinal cord and medulla oblongata are performed without any consciousness or sensation on the part of the subject.
We have treated the brain, not as a mass of organs radiating from the medulla oblongata as their real center, but as two cerebral masses, each of which is developed around the great ventricle.
The ganglia situated over the esophagus of insects correspond to the medulla oblongata in man, in which originate the spinal accessory, glosso-pharyngeal, and pneumogastric nerves.
This last would be progressively attacked throughout, if death from the medullaoblongata did not almost always supervene before the propagation of the virus can become general.
At the moment of death the medulla oblongata is always rabic.
Section of medulla oblongata from case of gas poisoning, stained by Nissl method, showing the swollen cells of the nucleus ambiguus.
Section of medullaoblongata from case of shell-shock with burial, stained by Nissl method, showing the swollen cells of the nucleus ambiguus.
The functions of the medulla oblongata are closely connected with the vital processes.
The medulla oblongata consists, like the spinal cord, of columns of white fibers and masses of gray matter, but differently arranged.
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.
If, instead of cutting the spinal cord, we separate the medulla oblongata from the pons, an immediate rise of temperature occurs, and continues until death, whether the operation be performed in a cold or heated room.
The speech zone of the left hemisphere directly controls the centres in the medulla oblongatathat preside over articulation and phonation; innervation currents are represented by the arrows coming from the higher to the lower centres.
It is, however, probable that there is a direct relation between the brain and the spinal nerve centres which control the costal and abdominal muscles independently of the respiratory centres of the medulla oblongata (vide fig.
Whilst the voluntary muscles are thus brought under the influence of the poison, symptoms denoting the invasion of the oblongata are rapidly developing.
The heart in vaso-motor paresis and paralysis is weakened in the first instance by the direct action of the poison on the medulla oblongata and the intracardiac ganglia.
The vital centres in the medulla oblongata gradually become involved, and death results from paralysis of the respiratory centre.
The medulla oblongata is a very serious and beautiful object.
They say the medulla oblongata is irritated, and the patient learns that he is suffering from neurosis of the nervus vague.
They are due to an exudation on | the medulla oblongata and | spinalis.
This distinction, which becomes much more evident later on by a thickening of the walls and roof of the front portion, separates the hind-brain into the cerebellum and the medulla oblongata (fig.
Some physiologists assert, that the medulla oblongata is the point at which excitement to motion commences, and sensation terminates; and also, that it possesses the power of originating motion in itself.
The spinal cord, or spinal marrow, is that part of the cerebrospinal system which is contained in the spinal canal of the backbone, and extends from the medulla oblongata to a short distance behind the loins.
The nerve paths from the cerebrum, and hence from these centers to the spinal cord and thence to the muscles, pass beneath the small brain, or the cerebellum, and through the medulla oblongata to the spinal cord.
Finally, we have the fifth and last section, the medulla oblongata (Figure 2.
The corpora quadrigemina are mostly covered by the cerebrum, and the oblongata by the cerebellum.
The longitudinal fibres ascend from the medulla oblongata and leave the pons by emerging from its upper surface as fibres of the two crura cerebri.
Its floor is formed by the grey matter of the posterior surfaces of the medulla oblongataand pons, already described (see figs.
The reticular ganglion of the oblongata is not in the adult a part of the central tubular grey matter, but has, through originally developing from it in the embryo, become ultimately isolated from its mother bed.
The medulla oblongata with its reticular ganglion seems to be the great rhythmic centre.
There are scattered groups of nerve cells in the medulla oblongata which have either no demonstrable connection with the nerve nuclei, or are positively known to be connected with the longitudinal associating strands.
It is not easy at first to understand how tetanus and epilepsy, that is, spasms consisting in movements whose direct projection is not in the medullaoblongata but in the cord, can be produced by irritation of the former.
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.
On the Reflex Functions of the Medulla Oblongata and the Medulla Spinalis, in Phil.
The fifth pair, nervus trigeminus, and the seventh pair, nervus facialis, arise from the medulla oblongata and are very close together.
The cerebellum is very large, and the surface of the medulla oblongata is more or less modified or specialized.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "oblongata" in a variety of sentences. We hope that you will now be able to make sentences using this word.
