Human Brain

Topics: Nervous system, Brain, Central nervous system Pages: 2 (536 words) Published: October 15, 2013
Human Brain is perhaps the most complex of organs, boasting between 50-100 billion nerve cells or neurons that constantly interact with each other. These neurons carry messages through electro chemicals in our body move in and out of these cells and establish an electric current. Scientists have, for a long time now, stimulated with different types of inputs individual neurons that have been isolated for study. To have enough statistical power, these experiments typically involved stimulating a single neuron over and over again, to get a general idea of how it responds to different signals. Although these studies have yielded a lot of information, they have their own limitations.

Moreover, these studies take into account an “average response” obtained by stimulating the neuron numerous times. The brain, on the other hand, acts based on single stimulus presentations. Therefore, the information given by an averaged response can often be insufficient. The messages travel in very fine threads called nerves. The nerves and the brain make up a system somewhat like telephone poles carrying wires across the city. This is called the nervous system. The nerves in the body don't just send messages from the brain to the organs, but also send messages from the eyes, ears, skin and other organs back to your brain. Some nerves are linked directly to the brain. Others have to reach the brain through a sort of power line down the back, called the spinal cord.

The brain and spinal cord make up the central nervous system. The brain doesn't just control your organs, but also can think and remember. That part of the brain is called the mind. he area at the front of the brain is the largest. Most of it is known as the cerebrum. It controls all of the movements that you have to think about, thought and memory. The cerebrum is split in two different sections, the right half and the left half.

The outer layer of the cerebrum is called the cortex. It is mainly made up of cell...
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