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. 2009 Jun 15;3:3. doi: 10.3389/neuro.03.003.2009

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Copyright © 2009 González-Menéndez, Contreras, Cernuda-Cernuda and García-Fernández.

This is an open-access article subject to an exclusive license agreement between the authors and the Frontiers Research Foundation, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.

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M1 and M2 cell subpopulations counts under LD conditions. One-way ANOVA tests revealed significant oscillation during the LD cycle for M1 cells (p < 0.001) and for M2 cells (p < 0.01). M1 cells showed a sharp decrease (p < 0.001) at the onset of the light period and then an increase between ZT3 and ZT8 (p < 0.01). For M2 cells, a significant difference was only detected between ZT18 and ZT23 (p < 0.05). Arrows indicate the two time-points in which the numbers of both cell subpopulations were significantly different (p < 0.001 at ZT3 and p < 0.01 at ZT18). (n = 4 per group at all the time-points analyzed).