central nervous system of brain and spinal cord.The substance of the brain in its composition uniform, his form a white and gray matter.White make up nerve fibers, their processes, which have, respectively, the white coloring.Gray - a cluster of nerve cells and processes of the cells.
gray matter of the spinal cord
it formed a very large number of neurons of three types, which are grouped into the kernel: radicular cells, neurons beam, the internal cells.Located inside, surrounded by white matter.It is more developed in the cervical and lumbar spine, which is associated with an increase in motor neurons.
In the center there is a central channel that runs the entire length of the spinal cord on it and center.Contained in the cerebrospinal fluid channel.It is surrounded by gray matter, which is called intermediate.Here, the gray matter can be divided into twin front, side and rear paired columns.Accordingly, in cross section are three horns: front, side and rear.
gray matter of the brain
brain spinal passes without any changes in the brain long.The border, which is formed between the elongated and back, is the place where the roots come first pair of nerves of the spinal cord.Parts of the upper portion is thicker than the bottom.In the brain are elongated nucleus, responsible for balance, coordination, metabolism, blood circulation and respiration.The hindbrain comprise two parts: the bridge and the cerebellum.
Bridge - a white roller located by the base of the brain.In front you can see the border with the brain stem and the back - to the medulla oblongata.A cross section viewed white substance, as well as the nucleus of gray.The continuation of the medulla oblongata is the dorsal part of the bridge, which houses the core sensory systems and cranial nerves.Here is dominated by the gray matter of the brain.The cerebellum is located at the back of the brain.It consists of hemispheres, and the middle part - the worm.The worm connects the two hemispheres.Cerebellum layer covers the gray matter of the cortex of the cerebellum which form meanders.The Smart enters the white substance.Top cover their gray matter of the brain.The picture is very similar in the context of a tree.
nuclei of gray matter among the most important and the most significant is a red core, which acts as the focal point.Water midbrain - a narrow channel with a length of two centimeters.It connects the ventricles, third and fourth.This channel is framed by the gray matter of the brain, which is the central and consisting of small cells.In the intermediate brain matter consists of nuclei belonging to the centers located under the bark and in charge of all kinds of sensitivity.Telencephalon consists of two parts, the two hemispheres.Cerebral cortex of the brain gray matter in the form of a thin plate.It consists of nerve cells in large numbers.These cells can be divided into layers.Each layer, in turn, has an inherent specific features.
Thus, gray matter - this assemblage of neurons and dendrites.Congestion occurs in the central nervous system, which form a spinal cord and brain.This material forms the cerebral cortex and subcortical nuclei.The substance located in the spinal cord is formed by nerve cells, of which there are about thirteen million.Displacement gray matter contained in the brain, can influence the level of intelligence.It is assumed that the additional amount of gray matter significantly faster processing of information.
