Number of Brain States

"The brain is made up of one hundred billion nerve cells or "neurons" which is the basic structural and functional units of the nervous system. Each neuron makes something like a thousand to ten thousand contacts with other neurons and these points of contact are called synapses where exchange of information occurs.
   And based on this information, someone has calculated that the number of possible permutations and combination of brain activity, in other words the number of brain states, exceeds the number of elementary particles in the known universe."
~Vilayanur Ramachandran

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