. 2008 Aug 8;105(34):12593–12598. doi: 10.1073/pnas.0805417105

Table 1.

Average number of neurons beneath 1 mm² of cerebral cortex surface

Species	M, g	A, mm²	T, mm	N, millions	D_neur, thousands/mg	N/A, thousands
Tupaia glis (n = 2) CV	0.515 ± 0.063	497 ± 158	1.089 ± 0.021	21.95 ± 1.60	38.16 ± 7.42	47.09 ± 18.18
	0.122	0.318	0.019	0.073	0.194	0.386
Callithrix jacchus (n = 3) CV	2.042 ± 0.120	1534 ± 273	1.310 ± 0.235	120.33 ± 43.30	54.24 ± 23.34	78.00 ± 22.70
	0.059	0.178	0.179	0.360	0.430	0.291
Otolemur garnetti (n = 2) CV	2.556 ± 0.129	1745 ± 331	1.462 ± 0.196	88.50 ± 14.75	31.90 ± 7.26	50.83 ± 1.18
	0.050	0.190	0.134	0.167	0.228	0.023
Aotus trivirgatus (n = 3) CV	3.698 ± 0.663	2214 ± 213	1.499 ± 0.039	200.32 ± 67.34	47.96 ± 15.34	92.96 ± 39.07
	0.179	0.096	0.026	0.336	0.320	0.420
Callimico goeldi (n = 1)	3.872	1953	1.600	178.77	38.55	91.53
Saimiri sciureus (n = 3) CV	6.996 ± 0.356	5250 ± 1332	1.465 ± 0.023	645.73 ± 43.74	80.92 ± 9.68	129.67 ± 39.62
	0.051	0.254	0.016	0.068	0.120	0.306
Macaca fascicularis (n = 1)	10.459	9381	1.413	400.74	32.94	42.71
Macaca radiata (n = 1)	15.493	8441	1.572	829.60	43.81	98.28
Cebus apella (n = 2) CV	15.820 ± 4.982	7653 ± 29	1.767 ± 0.147	930.67 ± 507.78	51.08 ± 15.44	121.73 ± 66.80
	0.315	0.004	0.083	0.546	0.302	0.549
Papio sp. (n = 2) CV	36.334 ± 8.233	16689 ± 3052	2.034 ± 0.028	1420.34 ± 18.07	33.73 ± 7.23	86.65 ± 16.93
	0.226	0.183	0.014	0.013	0.214	0.195
Variation	70.6×	29.2×	1.9×	60.7×	2.4×	3.0×

All values are average ± standard deviation and refer to one cerebral cortical hemisphere only. M, grey matter mass; A, surface area; T, grey matter thickness; N, number of neurons in the grey matter; D_neur, neuronal density; N/A, average number of neurons underneath 1 mm² of the cortical surface; CV, coefficient of variation (standard deviation/average).