The two great points of difference between a democracy and a republic are: first, the delegation of the government, in the latter, to a small number of citizens elected by the rest; secondly, the greater number of citizens, and greater sphere of country, over which the latter may be extended.
Neurons in the brain. The myelin sheath is a protective covering on the nerves in the brain. Damaged or destroyed myelin sheaths impede the nerves from sending messages to other parts of the brain.This results in loss of functioning to those areas of the brain.he myelin sheath is a protective covering on the nerves in the brain. Damaged or destroyed myelin sheaths impede the nerves from sending messages to other parts of the brain. This results in loss of functioning to those areas of the brain.
Although many patients lead full and rewarding lives, MS can cause impaired mobility and disability in more severe cases. Multiple sclerosis affects neurons, the cells of the brain and spinal cord that carry information, create thought and perception, and allow the brain to control the body. Surrounding and protecting some of these neurons is a fatty layer known as the myelin sheath, which helps neurons carry electrical signals.