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. 2013 Feb 27;33(9):4181–4191. doi: 10.1523/JNEUROSCI.4423-12.2013

Figure 7.

Figure 7.

Experience-dependent reorganization of TC/IC inputs onto L4 star pyramids. A, Pie charts of the proportion of L4 star pyramids not responsive to activation of TC afferents and not recurrently connected (black, TC−/rIC−), of L4 star pyramids responsive to activation of TC afferents and not recurrently connected (gray, TC+/rIC−), and of recurrently connected L4 star pyramids that responded to light activation of TC afferents (light blue, TC+/rIC+). Left chart, Control hemisphere (C); right chart, deprived hemisphere (MD). B, Bar plot of average amplitude of TC-EPSC onto TC+/rIC+ L4 star pyramids, of TC-EPSCs onto TC+/rIC− star pyramids, and of rIC-EPSP between L4 star pyramids. Light intensity: 0.3 mW/mm2. Control, Black; deprived, gray. Data are represented as average ± SE; asterisks indicate significant differences. C, Distribution of TC-EPSC amplitudes onto TC+/rIC− L4 star pyramids. Control, Dashed black line; deprived, gray line. Note that the entire distribution is shifted toward smaller amplitudes. D, Distribution of TC-EPSC amplitudes onto TC+/rIC+ star pyramids in L4. Control, Dashed black line; deprived, light blue line. Arrow, Peak of the distribution strongly affected by MD. Inset, Spearman rank-order correlation of TC-EPSP amplitudes onto presynaptic (Pre) and postsynaptic (Post) neurons of TC+/rIC+ L4 star pyramids. Note the MD-induced loss of correlation compared with control conditions (see Fig. 4D). Rs: Spearman rank-order correlation coefficient; p value of the Spearman correlation.