No, a brain cell is simply one neuron. The power of the brain comes from the fact that we have about 10 billion neurons, and each neuron has up to 10,000 synapses which are connections to other neurons. This mean you can have up to 100 trillion synapses or neural connections!

This neural network is the basis for all our thought and intelligence, but a single neuron itself can be thought of as just one “on-off” switch. Either it fires, or it doesn’t. Basically what a neuron does is sum all the potentials being channeled into it by its dendrite connections (in other words, it’s input connections from other neurons). If the sum potential is more that some certain activation threshold, the neuron “fires”, transmitting an electrical pulse down its axon and to all its outward bound synaptic connections.

So, I’m sure whatever you copied from had a typographical error. Perhaps there was some confusion and maybe it was talking about the information coded into the DNA of a human cell (any cell, not just a brain cell), which often is described as containing an encyclopedia’ s amount of information?

Anyhow, below is a great site from National Geographic which describes how the brain works, in as much as we know about it. There’s also another link about neurons in general. Finally, there is a link about the brain and information storage capacity, where each neuron is treated as being able to hold 1 bit of information. A bit is a binary piece of information, either on or off, like a light switch as explained above. In terms of words and phrases, a bit isn’t even enough to code for one letter of the English alphabet (you’d need at least 5 bits per letter). One bit of information is certainly a far cry from an encyclopedia!

Source(s):

http://www.sizes.com/people/brain.htm

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