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. 2012 Jan 9;7(1):e29965. doi: 10.1371/journal.pone.0029965

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Typlt et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Same sample of units (n = 174) and analysis as in figure 7. A1: Principal component analysis with assignment of the units to the different clusters gathered from hierarchical cluster analysis. A2: Principal component analysis with assignment of the units to the different PSTH types. Note that even a visualization based on the three dominant principal components does not indicate a clear separation of unit types. B: PSTHs of units in regions of the plot which are mainly occupied by other PSTH types, i.e. a PL_N (B1), a C_S (B2) and a unit which is not unambiguously to classify (B3). This unit was classified as C_T, but it could also be a PL.