How many molecular switches in your brain?

How many stars in the Milky Way?
How many nerve links in part of my brain?
How many switches, – well, now they can say
more than the number of computers and routers,
and internet connections all over the earth,
a thousand times more than that number of stars,
– and all so transportable, useful, compact,
– amazing, impossible, miraculous fact!
(ref: “Human brain has more switches than all computers on Earth” – news.cnet)