Figure 4.

Correspondence between measured and estimated cell densities. (A) Graphs show the correspondence between measured and estimated values for the inverse of neuronal density estimated by the model, d_n⁻¹, and the inverse of measured neuronal density, d⁻¹_nmes. (B) Correspondence between measured and estimated values for the inverse of glial density estimated by the model, d⁻¹_g, and the inverse of measured glial density, d⁻¹_gmes. Values expressed as picograms per cell, plotted for each species and brain structure: cerebral cortex (circles), cerebellum (squares) and rest of brain (triangles). Power fits plotted have exponents 0.991 ± 0.015, r² = 0.983, p < 0.0001 (A) and 0.987 ± 0.021, r² = 0.967, p < 0.0001 (B). Data from Herculano-Houzel et al. (2006, 2007, 2011), Azevedo et al. (2009), Sarko et al. (2009), and Gabi et al. (2010).