Table 1. LHN tracts characterized in electron microscopy data.

$\underset{\mathrm{¯}}{\mathrm{Tracts}}$ match the Primary Neurite Tract nomenclature defined in Figure 1. $\underset{¯}{\mathrm{Type}}$ indicates whether the tract contains output or local neurons or a mix of both. $\underset{¯}{\mathrm{Profiles}}$ indicates the total number of profiles within the tract. $\underset{¯}{\mathrm{Est}.\mathrm{LHNs}}$ indicates the sampling based estimate for the number of LHNs in the tract. $\underset{¯}{\mathrm{Range}}$ gives a 90% confidence interval.

Tract	Type	Profiles	Est. LHNs	Range	Recorded
AV4	LHLN>>LHON	324	252	244–259	Yes
PV4	LHLN>LHON	158	155	152–158	Yes
PV2	LHLN>>LHON	193	92	81–102	Yes
PD3	LHLN	75	59	43–75
PD4	LHLN	88	22	10–33
	–LHLNs–	838	578	555–602
AV3	LHON>LHLN	144	140	140
PD2	LHON	193	128	128	Yes
PV5	LHON	127	119	119	Yes
AD1	LHON	286	116	102–130	Yes
AV6	LHON	323	106	96–115	Yes
AV2	LHON>>LHLN	98	63	49–77	Yes
AD3	LHON	59	59	59
AV7	LHON	141	48	25–70
AV1	LHON	33	25	25
AV5	LHON	108	17	7–27
PV3	LHON	52	12	0–25
AD2	LHON	52	0	0
	–LHONs–	1616	832	797–868
	–Total–	2454	1411	1368–1454