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SV: Capacity of the brain

Ron Peterson ron_p at earth.execpc.com
Wed Sep 8 09:57:53 EST 1999

Russell Wallace (manorsof at iol.ie) wrote:

: In round numbers (assuming our current understanding of how neurons work
: is more or less correct), here are the raw figures for the human brain:

: Storage capacity: 10^15 bytes
: Processing speed: 10^18 calculations per second

The storage capacity seems high. A million books would correspond
to 10^12 bytes. Reading a page a second, would only correspond to
2 X 10^10 bytes.

With the brain consuming 20 watts of energy, each calculation
would take an infinitesmal amount of energy. How much energy
is consumed when a synapse fires?


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