Two Hemispheres ?

The human brain comprises of many billions of cells, several billion of them are neurons linked to networks that give rise to emotion, intelligence, creativity, consciousness and memory.

The skull-brain is kind of symmetric. Its Left and Right hemispheres are connected by the corpus callosum, a thick white band of nerves deep within the brain, and other axonal bridges.

It allows the 2 hemispheres to communicate and coordinate their activities. The highly convoluted surface of the cerebral hemispheres – the cortex (Lat. bark) – is about 2 mm thick and has a total surface area of about 1½ m² (4’x4’).

The Neo-cortex developed over 3 million years. It constitutes 5/6 of the human brain. It is the outer portion of our brain and covers the 2 cerebral hemispheres. It is the structural and functional processing and decoding system between energy + info sensory input, and the brain’s output.

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