Number of Neuron Connection in the Brain

Each nerve cell receives connections from other nerve cells at six sites called synapses. But here is an astonishing fact—there are about one million billion connections in the cortical sheet. If you were to count them, one connection (or synapse) per second, you would finish counting some thirty-two million years after you began. Another way of getting a feeling for the numbers of connections in this extraordinary structure is to consider that a large match-head's worth of your brain contains about a billion connections. Notice that I only mention counting connections. If we consider how connections might be variously combined, the number would be hyperastronomical—on the order of ten followed by millions of zeros. (There are about ten followed by eighty zero's worth of positively charged particles in the whole known universe!)


The different possible number of connections outnumbers the particles in the Universe (this is questionable).

Folksonomies: biology brain numbers

/health and fitness/disease (0.543706)
/business and industrial/energy/electricity (0.480182)
/law, govt and politics (0.407677)

connections (0.976276 (positive:0.518520)), different possible number (0.860385 (neutral:0.000000)), positively charged particles (0.851124 (positive:0.286396)), connections outnumbers (0.811975 (neutral:0.000000)), nerve cells (0.639185 (negative:-0.345026)), Neuron Connection (0.636681 (neutral:0.000000)), nerve cell (0.635509 (negative:-0.345026)), astonishing fact—there (0.627788 (positive:0.740744)), cortical sheet (0.624567 (positive:0.740744)), eighty zero (0.603790 (positive:0.286396)), extraordinary structure (0.592684 (positive:0.865923)), large match-head (0.577119 (positive:0.865923)), brain (0.420544 (positive:0.865923)), synapses (0.392569 (negative:-0.345026)), synapse (0.385536 (neutral:0.000000)), zeros (0.377116 (neutral:0.000000)), feeling (0.371166 (positive:0.865923)), Notice (0.366228 (negative:-0.266327)), millions (0.365282 (neutral:0.000000)), sites (0.358665 (negative:-0.345026)), way (0.354667 (positive:0.865923))

thirty-two million years:Quantity (0.010000 (neutral:0.000000))

Neuron (0.959592): dbpedia | freebase | opencyc
Nervous system (0.899110): dbpedia | freebase | opencyc
Brain (0.829303): dbpedia | freebase | opencyc
Synapse (0.710278): dbpedia | freebase
Axon (0.698625): dbpedia | freebase | opencyc
Action potential (0.691035): dbpedia | freebase
Chemical synapse (0.675778): dbpedia | freebase
Cerebral cortex (0.657404): dbpedia | freebase

 Bright Air, Brilliant Fire
Books, Brochures, and Chapters>Book:  Edelman , Gerald M. (1992), Bright Air, Brilliant Fire, Basic Books, Retrieved on 2012-04-26
  • Source Material []