Table 1. Percentage of MOAS in dendritic shafts of the rhesus macaque dlPFC.

	7 y.-o.			11 y.-o.			26 y.-o.			27 y.-o.			31 y.-o.			33 y.-o.
	n	MOAS %	sMOAS %	n	MOAS %	sMOAS %	n	MOAS %	sMOAS %	n	MOAS %	sMOAS %	n	MOAS %	sMOAS %	n	MOAS %	sMOAS %
Layer II	33	0	0	38	0	0	78	55.1	25.6	58	8.6	1.7	46	43.5	6.5	38	2.6	0
Layer III	43	0	0	28	0	0	52	30.8	13.5	88	13.6	2.3	41	48.8	19.3	42	52.4	11.9
Layer IV	64	0	0	54	0	0	28	67.9	32.1	54	5.6	1.9	53	30.2	11.3	38	5.3	2.6
Layers V-VI	26	0	0	79	10.1	1.3	49	18.4	12.2	49	10.2	0	31	38.7	16.1	29	10.3	0
All layers combined	166	0	0	199	4.0	0.5	207	42.0	20.3	249	10.0	1.6	171	39.8	12.9	147	19.7	4.8

n – total number of mitochondria analyzed in 3D.

MOAS and sMOAS are determined according to geometric characteristic described in Fig. 4.

All brain tissue segments were chosen for 3D reconstruction in a random manner by investigator blinded for the animal age and laminar locations.