Explanation of the nervous system

Explanation of the nervous system:
The nervous system consists of the central nervous system (brain and spinal cord) and the outer nervous system or a surround of two parts: the body (the motor nerves and sensory nerves) and automatic (guts)

Complex nervous system but thankfully we can understand his work without the need to understand every nook and cranny and every communication by it.

Complex nervous system installation because he during DO Atfilv and involves himself.

The first thing the fetus is composed of cells and divided into three types
The kind that have the skin and nervous system be an outer layer called ectoderm
, These form a tube on the back of the fetus will develop and become the brain and the spinal cord and nerve of it will come out

 

 

 

As we can see that the cells grow in a limited place and therefore involve
And 12 pairs out of the nerves of the brain (in the adult human graduated from the brain along the 10 cm), while there are 31 pairs of spinal nerves emerge from either side of the spinal cord in the back

 

The upper part of the nervous system called the forebrain or call also prosencephalon of two parts:
Telencephalon will grow to become a great hemispheres of the brain cerebrum
And the diencephalon, which means the part that is between the brain: becoming Aiiamas thalamus and the basic contract that is located in the depth between the two parts of the brain basal ganglia
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The next section is the midbrain = mesencephalon

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Section III is rhombencephalon
rhombomere means pieces that make up this part of the brain
Which becomes the medulla oblongata, the cerebellum and pons
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Then comes the spinal cord

 

Associated with the above mentioned parts with each other by nervous packages, these packages if they are located outside the central nervous system, we call it nerves nerves, but if they are located within the central nervous system, it is called:
tract, peduncle, lemniscus, fasciculus and all these different names for one meaning: bundles of nerves.

 

It is important to understand the movement in humans so that we can know where is the place of imbalance if there is difficulty in movement:

Can human spinal cord that works without that sends signals to the brain, call what works: reflection, and this so that humans can be controlled to the nines and moves very quickly.


But, of course, the brain is dominant remains uncontrolled movements of the body, brain cells which are responsible for movement, and is called upper motor neurons upper motor neurons and packs down to the spinal cord nerves called motor Downlink Packet descending motor pathways

Gets kind of understanding between nerve cells in the brain (which we call: top) and between nerve cells in the spinal cord called LOWER MOTOR NEURONS. And it's possible that the order that the shrinking muscles directly. Some of the motor nerve cells in the brain first contact with other cells in the spinal cord interneurons and these cells in turn relate to the spinal cord motor cells, authorized influence here indirectly.