Fig. 3: Fiber dissection from the ventral aspect.

Stepwise fiber dissection of the subsplenial region from the ventral towards the dorsal surface of the cerebrum after brain preparation following a modified Klingler technique. a Exposure of the inferior longitudinal fasciculus (ILF) and the fibers of the parahippocampal gyrus (fPHG) after removal of the entorhinal cortex (EC), cortex of the parahippocampal (cPHG) and fusiform (lateral to the PHG, not shown) gyri and the underlying arcuate fibers (AF). CA cerebral aqueduct, CC crus cerebri, Cing cingulum, Isth isthmus, LPS lateral perforated substance, MB mammillary body, MGB medial geniculate body, OT optic tract, PG pineal gland, PPS posterior perforated substance, Pu pulvinar, SCC splenium of the corpus callosum, SN substantia nigra, TC tuber cinereum, Tec tectum mesencephali, Teg tegmentum mesencephali. b View on the roof of the lateral ventricles (RLV), crus (crF), body (bF) and column (coF) of the fornix, and the psalterium (Ps) after removal of the mesencephalon, thalamus, and parts of the hypothalamus and the caudate nucleus. c Exposure of the dentate gyrus (DG), fimbria (Fi), gyrus fasciolaris (GF), the subcallosal trigone (SCT), inferior surface of the uncal apex (iUA), band of Giacomini (BG), and the external digitations of the hippocampal head (ED) after removal of the fibers of the parahippocampal gyrus, inferior longitudinal fasciculus, part of the cornu ammonis (CA) and the ependyma of the floor of the atrium (A) and the temporal horn (TH). d, e Dissection of the fornix from the dorsal end of the fimbria (Fi) along the crus (crF) towards the body of the fornix (bF). Dissection of the body of the fornix (bF) reveals the septum pellucidum (SP). No commissural fibers between the fornicis were identified. Removal of the ependymal layer of the roof of the lateral ventricle (RLV) exposed the fibers of the body of the corpus callosum (BCC). Dissections: NK.