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. 2016 Jun 10;5:e14592. doi: 10.7554/eLife.14592

Figure 6. Morphological and electrophysiological properties of L2 and L3 PreS neurons.

(A) Morphological reconstruction of a representative L2 (blue, left) and L3 (black, right) neuron, recorded during passive rotation. Scale bar = 50 μm. (B) Representative high-magnification pictures of a dendritic segment of a L2 (top) and L3 (bottom) neuron. Note the presence of spines in high density in both dendrites. Scale bars = 10 μm. (C) HD indices for all identified L2 (n = 11) and L3 neurons (n = 22). Three L3 neurons were silent, and hence not included in the analysis. Horizontal red lines represent medians and the p value is indicated (Mann-Whitney U test). (D) Representative spike-autocorrelogram for an identified L2 (top) and L3 neuron (bottom). Note the theta-rhythmicity of spiking for the L2 neuron. (E) Theta indices for all identified L2 (n = 10) and L3 neurons (n = 22) which met inclusion criteria for the theta analysis (see Materials and methods). Horizontal red lines represent medians and the p value is indicated (Mann-Whitney U test). (F) Average spike waveforms for L2 (blue, n = 11) and L3 (black, n = 22) neurons. Three L3 neurons were not included in the analysis since they were silent. Horizontal and vertical double-arrowheads indicate spike half-widths and spike negativity amplitudes, respectively. Scale bar = 1 ms. (G) Spike half-widths (left) and spike negativity amplitudes (right) for L2 (n = 11) and L3 (n = 22) neurons. Horizontal red lines represent medians and the p value is indicated (Mann-Whitney U test).

DOI: http://dx.doi.org/10.7554/eLife.14592.012

Figure 6—source data 1. Electrophysiological properties of identified L2 and L3 PreS neurons.
The table summarizes the main electrophysiological properties of L2 and L3 neurons (source data for Figure 6A (C and D). The numbers of neurons and the p values are indicated. All p values are from Mann-Whitney U test, except for ‘% of HD cells’ (Fisher’s exact test).
DOI: 10.7554/eLife.14592.013

Figure 6.

Figure 6—figure supplement 1. Schematic representation of structure-function relationships within the superficial layers of PreS.

Figure 6—figure supplement 1.

Schematic diagram showing the main principal cell types within PreS L2 and L3 (L2 calbindin-positive and calbindin-negative neurons, L3 pyramidal neurons), their corresponding long-range projection targets (MEC, contralateral Pres and contralateral RS29) and electrophysiological properties (e.g. HD versus non-HD modulated firing). Average spike waveforms and representative polar plots showing spiking activity as a function of HD for L2 and L3 neurons are also indicated.