Humans by the Numbers: The Brain

From the work of Suzana Herculano-Houzel, Brazilian Neuroscientist.

[Table by Tableizer]

Observed and Expected Cellular Composition of the Human Brain      
According to the Cellular Scaling Rules for Primate Brains      
Results are given in billions.      
  Expected Observed Difference
For a primate of 75 kg      
Total brain mass (g) 1,362 1,508 10.70%
Total number of brain cells 170.97 170.68 -0.20%
Total number of brain neurons 78.08 86.06 10.20%
Total number of brain nonneurons 94.28 84.61 -10.20%
For a primate brain of 1,508 g      
Total number of neurons 93.82 86.06 -8.30%
Total number of nonneurons 113.17 84.61 -25.20%
For a primate cortex of 1,233 g      
Total number of neurons 22.36 16.34 -26.90%
Total number of nonneurons 99.02 60.84 -38.60%
For a primate cerebellum of 154 g      
Total number of neurons 77.94 69.03 -11.40%
Total number of nonneurons 11.26 16.04 42.40%
For a primate RoB (Rest of Brain) of 118 g      
Total number of neurons 0.62 0.69 11.30%
Total number of nonneurons 7.17 7.73 7.80%

Brain-Lateral

Brain-Transverse