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Topological Reorganization of Odor Representations in the Olfactory Bulb

Figure 3

Similarity Relationships between Odor-Evoked Activity Patterns

(A) Color-coded correlation matrices depicting the pairwise similarity between IN activity patterns evoked by different odors in successive 256-ms time windows (dataset 2). Left: correlations between activity patterns before stimulus onset.

(B) Average correlation between initially similar activity patterns as a function of time. For each cell type and odor pair, maximal correlation coefficients were determined (datasets 1 and 2). The ten odor pairs yielding highest correlations were selected and their average correlation coefficients plotted as a function of time.

(C) Mean factor dominance (± SD) as a function of time (datasets 1 and 2). Factor dominance quantifies the tightness of pattern grouping based on pattern similarity (Materials and Methods).

(D) Mean percentage of variance explained by the four factors (“communality”; solid lines) as a function of time (datasets 1 and 2). Dashed lines show the fraction of variance that is not accounted for by factors (“Residual”).

Figure 3

doi: https://doi.org/10.1371/journal.pbio.0050178.g003