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. 2013 May 28;7:75. doi: 10.3389/fncir.2013.00075

FIGURE 5.

FIGURE 5

Inputs of L2/3 pyramidal and L3d and L4 spiny neurons to CSNs, and electrical properties of L2/3 and L3d/L4 neurons in rat brain. Many axon boutons of L2/3 pyramidal neurons were in close apposition to the apical or basal dendrites of CTNs (A). However, unexpectedly, the axons of L3d/L4 star-pyramidal neurons formed more appositions with the dendrites of CTNs (C) than those of L2/3 pyramidal neurons. The two groups of excitatory neurons were different in electrical properties: L2/3 pyramidal neurons showed regular-spiking responses with slow adaptation (B), whereas L3d/L4 star-pyramidal neurons exhibited regular-spiking ones with fast adaptation (D), when a long depolarizing current pulse was injected. Modified with permission from Figures 2–4 of Cho et al. (2004b) and Figures 4 and 5 of Cho et al. (2004a).