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. 2013 Nov 8;5:69. doi: 10.3389/fnagi.2013.00069

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Copyright © 2013 Gray, Rudolph, Engle and Recanzone.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Age-related changes in the number of parvalbumin positive cells in the LGN. Comparison of micrographs from a (A) 15 year old magnocellular layer 2 and (B) 35 year old magnocellular layer 2 reveals apparent age-related increases in the number of PV+ cells. Likewise, a comparison of micrographs from a (C) 15 year old parvocellular layer 3 with a (D) 35 year old parvocellular layer 3 show similar increases. The left side of this image corresponds to the medial aspect and the top to the dorsal aspect of the sections. Scale bar = 150 μm.