Citation
Equal numbers of neuronal and nonneuronal cells make the human brain an isometrically scaled-up primate brain
TL;DR
Human brain contains ~86 billion neurons
Established that the human brain contains approximately 86 billion neurons using the isotropic fractionator method, revising earlier estimates that ranged from 10-100 billion. This precise count is essential for understanding the scale of human neural network topology and the metabolic/wiring constraints that shape brain architecture.
Key Findings from Azevedo & al. (2009)
- Human brain contains ~86 billion neurons
- Roughly equal numbers of neuronal and non-neuronal cells
- Human brain is isometrically scaled primate brain (not qualitatively different)