Fig. 4: Fiber dissection from the dorsal aspect.

a Exposure of the corpus callosum (CC) and the supracommissural hippocampus with its medial longitudinal stria (MLS), lateral longitudinal stria (LLS) and the indusium griseum (IG). b Removal of the fibers of the body of the corpus callosum (BCC) until the lateral ventricle (LV), the crus fornicis (CF), and the septum pellucidum (SP) were shining through (right). Further dissection of the remaining callosal fibers and removal of the choroid plexus and lamina affixa revealed the taenia fornicis (TF), thalamus (Th), lamina terminalis (LT) and the caudate nucleus (CN) (left). c Elevation of the psalterium (Ps) without identification of commissural fibers between the crura fornicis (CF) revealed the velum interpositum (VI). The choroid plexus (CP) is fixed to the crus fornicis via the taenia fornicis (TF) and to the lamina affixa (LA) through the taenia choroidea (TC). The thalamus (Th) is shining through the choroid plexus and the lamina affixa. d Different specimen, where the SP and Ps was left intact on the left side, but on the right the CP and LA were removed to expose the Th and the choroidal fissure (FC). Dissection of the right CN revealed the underlying fibers of the internal capsule (IC). Stripping of the ependyma in the atrium (A) exposed the fibers of the forceps major (FM). The calcar avis (CA) is formed by the underlying sulcus calcarinus. Starting from the SCC and running over the atrium are the fibers of the tapetum (Ta). e Anterior oblique view on the same specimen (before dissection of the CN). The fibers of the FM create the bulb of the posterior horn (B). Dissections: NK (A-C) and CS (D-E).