The brain has a triad structure.

Our brain actually contains three brains: the lower or reptilian brain that controls basic sensory motor functions; the mammalian or limbic brain that controls emotions, memory, and biorhythms; and the neocortex or thinking brain that controls cognition, reasoning, language, and higher intelligence.

The brain is not a computer.

The structure of the brain's neuron connections is loose, flexible, "webbed," overlapping, and redundant. It's impossible for such a system to function like a linear or parallel-processing computer. Instead, the brain is better described as a self-organizing system.

The brain changes with use, throughout our lifetime.

Mental concentration and effort alters the physical structure of the brain. Our nerve cells (neurons) are connected by branches called dendrites. There are about 10 billion neurons in the brain and about 1,000 trillion connections. The possible combinations of connections is about ten to the one-millionth power. As we use the brain, we strengthen certain patterns of connection, making each connection easier to create next time. This is how memory develops.

Well brother Najabat will reply you later in detail just after my exams... now saying thanks only... and same to Gr8khali

Regards

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"When Allah leads you to the edge of the cliff, Trust Him Fully, only 1 of 2 things will happen either He will catch you when you fall or He will teach you how to fly"