TABLE 1.

Assignment of bins for retrograde pathway tracing data

	Mean average		Highest value
Descriptor	Neuron count	Binned value	Neuron count	Binned value
Very weak	1 to <2	1	1 to <5	1
Weak	2 to <5	2	5 to <8	2
Weak‐moderate	5 to <8	3	8 to <13	3
Moderate	8 to <13	4	13 to <21	4
Moderate‐strong	13 to <21	5	21 to <34	5
Very strong	21 to <34	6	34 to <55	6
Strong	>34	7	>55	7

Note: Retrograde tracing data were assigned to one of seven bins according to the range of positively identified labeled neurons that were counted. A different bin range was used for calculation of average (mean) and highest value data (see Methods for details).