## Chapter 9/Figure 6.jpg Back | Home | Next | 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).