Table 2.

Synapses in layer 2/3

Animal AM no.	Age (y)	Sex	Asymmetric			Symmetric			Total Nv 10⁶/mm³
			Mean length of junctions (µm)	Nv×10⁶/mm³	S.D.	Mean length of junctions (µm)	Nv×10⁶/mm³	S.D.
16	5	M	0.35	543	70	0.30	61	22	605
76	6	F	0.33	542	89	0.28	70	21	613
129	7	F	0.35	541	85	0.28	83	21	625
47	9	M	0.33	485	85	0.27	82	10	567
53	10	M	0.37	490	63	0.30	76	16	561
Means			0.35	520	78	0.29	74	18	595
42	12	M	0.37	445	47	0.28	70	19	515
144	15	M	0.32	479	63	0.30	56	5	535
143	16	M	0.33	468	43	0.29	63	22	531
221	18	F	0.33	560	51	0.28	78	8	638
209	19	M	0.32	491	51	0.29	63	13	555
133	19	M	0.32	507	11	0.30	64	21	570
Means			0.33	491	44	0.29	67	15	557
178	22	F	0.37	347	41	0.30	51	5	416
19	25	F	0.36	440	29	0.29	63	15	503
12	27	F	0.35	407	74	0.27	78	14	485
62	27	M	0.38	343	77	0.31	51	23	394
26	29	F	0.38	385	61	0.31	58	19	443
41	32	F	0.34	320	38	0.31	46	12	366
Means			0.36	374	53	0.30	58	15	435