Hippocampal Formation

Studies of Histology, Histochemistry and Micrometry of Hippocampus in Surti Buffalo (Bubalus bubalis)

“…The histological and histochemical study of the hippocampus were almost similar to that of Hart (1998); Stephan and Manolescu (1980) in the primates; Singh et al, (2013); Kumaravel et al, (2015) in buffalo; Cappaert et al, (2015) in human beings;…”

Topography of Place Maps along the CA3-to-CA2 Axis of the Hippocampus

“…All tetrodes were identified, and the tip of each electrode was found. Subregions of the hippocampal proper were defined according to standard definitions (Lorente de Nó , 1934;Boccara et al, 2015;Cappaert et al, 2015;see Supplemental Experimental Procedures). For CA3 and CA2 tetrodes, distance from the proximal end of CA3 was measured manually and scaled by the total length of CA3.…”

“…Such variations, with functional consequences, were first demonstrated in CA1. In CA1, the sharpest place fields are found near CA3, in the proximal region (Henriksen et al, 2010), which is the part of CA1 that has the strongest connectivity with the spatially modulated grid cells and border cells of the medial entorhinal cortex (MEC) (Naber et al, 2001;Hafting et al, 2005;Solstad et al, 2008;Zhang et al, 2013;Cappaert et al, 2015). In more distal regions of CA1, where more of the cortical input comes from the lateral entorhinal cortex (LEC), place fields are more dispersed and cells respond more strongly to nonspatial stimuli, such as discrete objects and odor signals (Henriksen et al, 2010;Burke et al, 2011;Nakamura et al, 2013;Igarashi et al, 2014), much like neurons in the LEC itself (Hargreaves et al, 2005;Deshmukh and Knierim, 2011;Tsao et al, 2013).…”

On the Value of Reptilian Brains to Map the Evolution of the Hippocampal Formation

“…The allocortex comprises a large number of different regions, such as the piriform cortex and the hippocampal formation. The hippocampal formation consists of two major parts: a core region (dentate gyrus, mossy cells, CA fields, and subiculum) and a surrounding belt or parahippocampal region (pre-and parasubiculum, medial and lateral entorhinal cortex, post-and perirhinal cortex, and parts of retrosplenial and cingulate cortex) [Lorente de Nó, 1933;1934;Filimonoff, 1947;Blackstad, 1956;Köhler, 1986;Slomianka and Geneser, 1991;Amaral and Lavenex, 2009;Cappaert et al, 2015]. In reptiles, a more elementary terminology is used for cortical regions, medial, dorsal, and lateral cortex, each with only a single layer of principal cells.…”