Table 1.

Volumetric analysis of the 16 reconstructed brain structures included in the standard brain atlas. Calculations for the medulla, lobula and lobula plate are based on 10 brains, whereas the remaining structures are based on 11. Mean volume (Mean V), relative volume (Rel. V), standard deviation (SD) and relative standard deviation (Rel. SD).

Structure	Mean V (μm3)	Rel. V (%)	SD (μm3)	Rel. SD (%)
Right antennal lobe	4.34 × 106	2.95	4.95 × 105	11.37
Left antennal lobe	4.31 × 106	2.92	5.15 × 105	11.96
Central body	1.69 × 106	1.14	3.05 × 105	18.07
Right calyx	2.38 × 106	1.61	3.15 × 105	13.22
Left calyx	2.38 × 106	1.61	3.24 × 105	13.61
Right peduncle and lobe	1.41 × 106	0.96	4.34 × 105	30.76
Left peduncle and lobe	1.34 × 106	0.91	3.89 × 105	28.93
Right anterior optic tubercle	4.98 × 105	0.34	1.26 × 105	25.37
Left anterior optic tubercle	5.00 × 105	0.34	1.24 × 105	24.77
Midbrain region	9.31 × 107	63.12	1.52 × 107	16.32
Right medulla	1.30 × 107	8.79	1.07 × 106	8.24
Left medulla	1.27 × 107	8.63	1.05 × 106	8.26
Right lobula	3.61 × 106	2.44	2.52 × 105	6.98
Left lobula	3.40 × 106	2.30	3.34 × 105	9.82
Right lobula plate	1.47 × 106	1.00	2.83 × 105	19.23
Left lobula plate	1.38 × 106	0.94	3.22 × 105	23.33