Gray matter in the brain, relation of, to intelligence, 123.
The importance of gray matter in mental processes has evidently been greatly overestimated, for it has been found to be thicker in the brains of negroes, murderers and ignorant persons than it was in the encephalon of Daniel Webster.
It matters not at what place the spinal cord be cut, a central area of gray matter, resembling in form the capital letter H, is always found.
With a sharp knife cut sections through the different parts, showing the positions of the "gray matter" and of the "white matter.
The "gray matter" comprises the nerve centers, lower and higher.
The principal higher motor center is the "motor area" of the brain, located in the cortex or external layer of gray matter, in the cerebrum.
Physicians often ask me how I can estimate the relative quantity of gray matter in a living head without cutting into it.
Hence the relative proportion of gray matter in different brains has come to be regarded by physiologists as a test of mental power.
While most of the spinal cord is made up of bundles of white fibres, carrying messages from the body to the brain, its central portion, or core, is made of gray matter.
Of what use are the ganglia (gray matter) in the spinal cord?
The rest of the nervous system is made up of what is called white matter, from its lighter color; and this is chiefly mere bundles of telephone wires carrying messages from one piece of gray matter to another, or to the muscles.
The posterior root is distinguished by possessing a ganglion of gray matter, and by a somewhat larger size.
Like it, also, the surface of the cerebellum is composed of gray matter, and its interior is chiefly white matter.
The gray matter, as it is termed, lies in the form of an irregular crescent, with one end considerably larger than the other, and having the concave side turned outwards.
It appears that neither the absolute nor relative size of the cerebrum, but the amount of gray matter which it contains, is the criterion of mental power.
The posterior alone connects directly with the gray matter of the cord, and has a small ganglion of gray matter of its own at a little distance from its origin.
It is a mass of white fibers, with cells of gray matter sprinkled on the outside, or lodged here and there in ganglia.
Another interesting point is the development of cerebral convolutions in certain animals, by which the relative amount of gray matter is increased.
He has invariably found the layer of vesicular or gray matter to be thicker than that of Daniel Webster's brain.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "gray matter" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
