## Chapter 9/Figure 1.jpg Back | Home | Next | (A) 3D wireframe diagram showing the distribution of cholinergic neurons in the basal forebrain. Cholinergic cells (dots) were mapped from 12 sections, approximately 300 microns apart. The contours of the corpus callosum and the section outlines are marked. (B) Composite map illustrating the dendritic architecture of the basal forebrain cholinergic system. The location of panel (B) corresponds to the enclosed box in (A). Dendrites of approximately 1,300 cholinergic neurons were traced from 7 coronal sections. Diagonal white lines delineate the approximate location of the corresponding major forebrain areas. HDB= horizontal limb of the diagonal band; ic= internal capsule; MS/VDB= medial septum/vertical limb of the diagonal band; SI= substantia innominata. Scale bar: 1 mm (applies only to B).