Chapter 9/Figure 6.jpg
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Comparison of the dendritic orientation derived from polar histograms with
the orientation vectors. (A) Part of the septal area from Fig. 5A as viewed
from the sagittal direction. C, D, E with arrows point to regions that may
correspond to the same cell populations as selected for the polar histograms
from sagittal sections of a different brain as shown in (B). (B) 137 cholinergic
cells (filled circles) were selected from a stack of sagittal sections comprising
the septal region (n= 2,266 cholinergic cells, dots) for dendritic tracing.
Letters C, D, E and F mark boxes that were used to select dendrites for
the orientation analysis. In both figures ac indicates the location of the
anterior commissure. Despite slightly different orientation of the sagittal
sections, one can recognize the same cell groups as seen in the 3D rendering.
(C) - (F) Polar histograms representing dendritic orientation from indicated
areas. Numbers at upper right indicate the number of dendritic segments
in the sample. Numbers along the circles within the polar histograms mark
distances in microns from the origin (see APPENDIX of chapter 9 for explanation).
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