TABLE 4.

Neuron Soma Volume and Cell Density in the Main Nuclei of the Rat, Monkey, and Human Amygdala

		Mean			Ratio
		Rat	Monkey	Human1	M/R	H/M	H/R
Lateral	Neuron soma volume2	963	1,433	3,099	1.49	2.16	3.22
	SD	76	158	62
	Neuron density3	99,000	42,000	9,000	0.42	0.21	0.09
	SD	8,400	3,700	900
	Glia density3	68,000	57,000	—	0.84	—	—
	SD	10,200	8,700	—
	% of nuclei volume4	9.55	5.96	2.84	0.62	0.48	0.30
	SD	1.26	0.79	0.29
Basal	Neuron soma volume	1,187	2,154	3,245	1.81	1.51	2.73
	SD	109	144	88
	Neuron density	97,000	26,000	—	0.27	—	—
	SD	13,200	1,600
	Neuron density (B + PL)	—	30,000	10,000	—	0.33	0.10
	SD		1,200	700
	Glia density	89,000	53,000	—	0.60	—	—
	SD	11,900	4,800
	% of nuclei volume	11.44	5.69	3.21	0.50	0.56	0.28
	SD	1.39	0.61	0.23
Accessory basal	Neuron soma volume	932	1,804	3,393	1.94	1.88	3.64
	SD	214	92	72
	Neuron density	92,000	36,000	9,000	0.39	0.25	0.10
	SD	11,100	1,000	500
	Glia density	57,000	53,000	—	0.93	—	—
	SD	7,400	5,200
	% of nuclei volume	8.74	6.54	2.94	0.75	0.45	0.34
	SD	2.82	0.41	0.19
Central	Neuron soma volume	726	1,374	1,893	1.89	—	—
	SD	152	69	44
	Neuron density	130,000	37,000	10,000	0.28	0.27	0.08
	SD	24,900	3,500	1,200
	Glia density	89,000	61,000	—	0.69	—	—
	SD	21,500	6,200
	% of nuclei volume	9.70	5.06	1.94	0.52	0.38	0.20
	SD	3.64	0.40	0.24
Medial	Neuron soma volume	651	1,176	—	1.81	—	—
	SD	60	27
	Neuron density	150,000	52,000	—	0.35	—	—
	SD	19,300	4,700
	Glia density	85,000	63,000	—	0.74	—	—
	SD	24,400	10,800
	% of nuclei volume	9.81	6.16	—	0.63	—	—
	SD	1.71	0.63
Paralaminar	Neuron soma volume	—	1,470	—	—	—	—
	SD		87
	Neuron density	—	46,000	—	—	—	—
	SD		5,300
	Glia density	—	33,000	—	—	—	—
	SD		5,100
	% of nuclei volume	—	6.80	—	—	—	—
	SD		0.70

H: human ; M: monkey ; R: rat.

¹Data reported from Schumann and Amaral (2005) and (2006).

²Neuron soma volume in cubic micrometer.

³Cell number per cubic millimeter.

⁴Refers to the fraction of the amygdala nuclei volume occupied by neuronal somas.