Table 1.

Adult chimpanzee visual cortex total cell and neuron estimates based on three quantification techniques.

Tissue	Quantification	Parameter	Sample	Estimate
Flat	Neubauer chamber	All cells	n = 61	998,480,148
Flat	Flow cytometry	All cells	n = 61	1,015,656,849
Slice	Optical fractionator	All cells	n = 324	961,086,450
Flat	Neubauer chamber	Neurons	n = 61	651,739,214
Flat	Flow cytometry	Neurons	n = 61	664,726,981
Slice	Optical fractionator	Neurons	n = 316	695,478,260
Flat	Neubauer chamber	Percent neurons	n = 13	62.0%
Flat	Flow cytometry	Percent neurons	n = 61	65.1%
Slice	Optical fractionator	Percent neurons	n = 10	72.4%
Flat	Image J	Volume (mm3)	n = 61	5275
Slice	Cavalieri (Nissl)	Volume (mm3)	n = 10	4819
Slice	Cavalieri (NeuN)	Volume (mm3)	n = 10	4778
Flat	Neubauer chamber	Cell density	n = 61	192,184
Flat	Flow cytometry	Cell density	n = 61	195,551
Slice	Optical fractionator	Cell density	n = 10	197,331
Flat	Neubauer chamber	Neuron density	n = 61	125,641
Flat	Flow cytometry	Neuron density	n = 61	128,005
Slice	Optical fractionator	Neuron density	n = 10	146,008

Summary table showing the parameter estimates obtained from flattened cortical samples (Flat) and brain slices (Slice).