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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 5. Developmental changes in the tangential extent of feedback label.

Figure 5

Area of region that encompasses 90% of the peak density of feedback cells in the supragranular (A) and infragranular (B) layers of areas 18, 19, 21, and Ssy as a function of age. With the exception of infragranular area 18, the region in each cortical area furnishing area17 feedback remains essentially unchanged in extent. Regression line is plotted for area 18. Error bars represent ±SEM.