Central Nervous system
The central nervous system (or névraxe ) is the part of the Nervous system surrounded by the Méninge S and isolated biochimiquement from the remainder from the organization by the hemato-encephalic Barrière.
AnatomyAt the human , it includes/understands:
- the Brain in the brain-pan, consisted:
- the Brain (or prosencéphale), itself made up of the Télencéphale and the Diencephalon (left more " centrale")
- the cerebral Trunk which one can divide from top to bottom into three parts: the Mésencéphale, the Bridge of Varole (or annular protuberance) and the Medulla oblongata (or medulla)
- the Cerebellum
- the Spinal-cord (or marrow spinale) in the vertebral Channel.
The cerebral trunk has a rather central position; it is in continuity with at the same time the brain in top and ahead, the cerebellum behind and the spinal-cord in bottom.
The liquid céphalorachidienThe névraxe contains Liquide céphalorachidien (LCR) in several cavities, which are in continuity.
- the brain contains LCR in its ventricular Système, consisted:
- two ventricles side in the télencéphale
- the third ventricle in the diencephalon
- the acqueduc of Sylvius in the mésencéphale
- the fourth ventricle, schematically located between the protuberance and the bulb ahead, and the cerebellum behind.
- the spinal-cord contains LCR in its central channel, the Canal of the épendyme.
The névraxe is also surrounded of the LCR contained in the brain-pan and the vertebral channel.
EmbryologyThe brain initially consists of three parts: the prosencéphale, the mésencéphale and the Rhombencéphale. The first and the third are divided then each one into two, which gives five parts: the télencéphale, the diencephalon, the mésencéphale, the métencéphale and the myélencéphale.
Télencéphale and diencephalon give the brain. The mésencéphale gives the part of the cerebral trunk of the same name. The métencéphale is at the origin of the protuberance and the cerebellum. Lastly, the myélencéphale gives the bulb.
The spinal-cord, as for it, lengthens gradually.
- Cell gliale;
- Synapse and synaptic transmission;
- plasmic Membrane;
- synaptic Plasticity;
- Reflex of extension;
- Reflex of inflection;
- Nervous system;
- Classification set of themes of the neurosciences;
- center of study of the central nervous system.
Simple: Exchange nervous system
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