Table 1. Variability in numerical estimates between quantitative studies.

Nervous System Structure	Species	Method	Numerical Ranges	References
Cerebral cortex	Human	HIS	0.6-16.5 ×109	Haug, 1986
Dorsal root ganglion, Lumbar 4	Rat	HIS	5.3-12.5 ×103	Schmalbruch, 1987
Dorsal root ganglion, Lumbar 5	Rat	HIS	2.0-14.8 ×103	Schmalbruch, 1987
Dorsal root ganglion, Lumbar 6	Rat	HIS	4.1-14.1 ×103	Schmalbruch, 1987
Purkinje cells	Rat	STE	2.1-6.1 ×105	Guillery & Herrup, 1997
Cerebral cortex	Human	STE	13.7-22.8 ×109	Peters et al., 1998
Dentate gyrus	Mouse strains	STE	0.38-0.94 ×106	Abusaad et al., 1999
Pyramidal cell layer	Mouse strains	STE	0.43-0.93 ×106	Abusaad et al., 1999
Dorsal root ganglion, Lumbar 5	Rat	STE	14.1-19.2 ×103	Tandrup et al., 2004
Hippocampus	Human	STE	22.6-40.4 ×106	Korbo et al., 2004
Granule cells (Dentate gyrus)	Rat	STE	1.2-1.55 ×106	Schmitz & Hof, 2005
Pyramidal cells (CA1-3)	Rat	STE	615-930 ×103	Schmitz & Hof, 2005
Cerebral cortex	Rhesus monkey	STE	1.35-2.95 ×109	Charvet et al., 2015
Cerebral cortex	Rhesus monkey	IF	0.825 ×109	Charvet et al., 2015
Purkinje cells	Rat	STE	2.1-6.1 ×105	Herculano-Houzel et al., 2015
Lateral geniculate nucleus	Human	STE	1.99-3.48 ×106	Herculano-Houzel et al., 2015
Neocortex	Human	IF	12.7-16.3 ×109	Herculano-Houzel et al., 2015
Cerebellum	Human	IF	54-65 ×109	Herculano-Houzel et al., 2015
Whole Brain	Human	IF	67.3-86 ×109	Herculano-Houzel et al., 2015
Purkinje cells	Human	HIS	0.88-26 ×106	von Bartheld et al., 2016
Purkinje cells	Human	STE	15.4-30.5 ×106	von Bartheld et al., 2016
Dorsomedial thalamic nucleus (Schizophrenia)	Human	STE	0-40% loss	Dorph-Petersen & Lewis, 2017
Spiral ganglion (Young Adult)	Human	HIS	23.1-33.7 ×103	Kaur et al., 2018
Spiral ganglion (Young Adult)	Human	STE	26.7-41.7 ×103	Kaur et al., 2018

HIS, histology (profile counting = 2D Method); IF, isotropic fractionator; STE, stereology (= 3D Method)