| Range |
~1.5×10^14 synapses
|
| Organism |
Human Homo sapiens |
| Reference |
Drachman D (2005). "Do we have brain to spare?".Neurology 64 (12): 2004–5.doi:10.1212/01.WNL.0000166914.38327.BB. p.2004 left column top paragraphPubMed ID15985565
|
| Primary Source |
Pakkenberg B, Pelvig D, Marner L, et al. Aging and the human neocortex. Exp Gerontol 2003 38: 95–99.PubMed ID12543266
|
| Method |
Stereologic studies |
| Comments |
p.2004 left column top paragraph:"Within the liter and a half of human brain, stereologic studies estimate that there are approximately 20 billion neocortical neurons, with an average of 7,000 synaptic connections each (primary source). The cerebral cortex has about 0.15 quadrillion synapses—or about a trillion synapses per cubic centimeter of cortex." |
| Entered by |
Uri M |
| ID |
112056 |