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. Author manuscript; available in PMC: 2016 Jan 31.
Published in final edited form as: Nat Neurosci. 2015 Jun 22;18(8):1109–1115. doi: 10.1038/nn.4049

Fig. 4. PV-IN axonal boutons transiently increase during learning.

Fig. 4

(a) PV-INs mainly inhibit perisomatic regions. (b) Top, a field of PV-IN axons in L2/3. Bottom, zoom of outlined area above. (c) Mean normalized bouton density (top) and daily bouton dynamics (bottom) of PV-INs in no training animals (n = 6 mice, 488 boutons). (d) Mean normalized bouton density (top) and daily bouton dynamics (bottom) of PV-INs in training animals (n = 5 mice, 396 boutons). PV boutons increase with training (P<0.001, 2-way ANOVA with post hoc Tukey's test, compared to ʽno trainingʼ). (e) Bouton formation and elimination of PV-INs did not occur during or within two hours of training sessions (n = 3 mice, 12 dynamic boutons out of 215 total boutons). Error bars indicate SEM.