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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: J Comp Neurol. 2014 May 5;522(14):3208–3228. doi: 10.1002/cne.23591

Figure 7. Age dependent increase in the median nearest neighbor distance (NND) between feedback cells in the juvenile ferret visual cortex.

Figure 7

A, B: Median nearest neighbor distance between feedback cells in the supragranular (A) and infragranular (B) layers of areas 18, 19, 21, and Ssy as a function of age. Median NND increases monotonically at the same rate in all areas. Regression lines are plotted for each visual area. Error bars represent ±SEM C: Conformity ratio (mean NND/Standard deviation of NND) in supra- and infragranular layers of each area as a function of age. This measure of regularity of spacing between feedback cells remains unchanged with age, and provides no strong evidence for a nonrandom distribution of cells.