If you're thinking of the brain as a computer, [the neuron] is the transistor.
— Carl Schoonover

There are 100 billion neurons in the adult human brain, and each neuron makes something like 1,000 to 10,000 contacts with other neurons in the brain. Based on this, people have calculated that the number of permutations and combinations of brain activity exceeds the number of elementary particles in the universe.
Vilayanur Ramachandran neuron quote

Here is a neuron that fires when I reach and grab something, but it also fires when I watch Joe reaching and grabbing something. ... It's as though this neuron is adopting the other person's point of view.
— Vilayanur Ramachandran

Stem cell research is the key to developing cures for degenerative conditions like Parkinson's and motor neuron disease from which I and many others suffer. The fact that the cells may come from embryos is not an objection, because the embryos are going to die anyway.
— Stephen Hawking

The doctor who diagnosed me with ALS, or motor neuron disease, told me that it would kill me in two or three years.
— Stephen Hawking