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

Histological, histochemical, and immunohistochemical studies of hippocampus in male New Zealand rabbits

“…The present investigation revealed that the dentate gyrus appeared as a trilayered cortex forming a cap‐like around the free edge of Cornu Ammonis. The same results were recorded by Hjorth‐Simonsen and Laurberg (1977), Wyss, Swanson, and Cowan (1979), and Gori et al (2018). Wyss et al (1979) added that the anatomicalization of dentate gyrus around the free end of the hippocampus proper facilitates the repeated circuit of information through nerve fibers between the entorhinal cortex, hippocampus proper, dentate gyrus, and subiculum.…”

“…It is generally accepted that the hippocampus proper represented by the C-shaped structure resembles the horns of Ammon (Cornu Ammonis) (Amaral, 1978). The present study showed that the Cornu Ammonis could be divided into four parts, CA1, CA2, CA3 & CA4, regarding to the density and size of the pyramidal cells as stated by Heath & Harper (1974), Andersen, Soleng, and Raastad (2000), Amaral andLavenex (2006), andGori, Dubal, Patel, andPanchal (2018). In fact, the CA4 is the deep polymorphic layer of the dentate gyrus as stated by Blackstad (1956) and Amaral (1978).…”

“…In CA3, the neurons are larger and arranged in 2–5 layers with thick axon hillock (Paxinos & Watson, 1996). The CA4 lies in the concavity of the dentate gyrus (Bayer, 1985; Gori et al, 2018).…”

“…In CA1, the stratum pyramidale consists of large-sized neurons arranged in 4-6 layers (Martina et al, 2000) while in CA2, the pyramidal neurons are smaller and arranged in 3-4 layers (Johensen, 1993;Swanson, 1981). On the contrary, Gori et al (2018) mentioned that the CA1 contained small pyramidal cells and the CA2 had a narrow, dense band of large pyramidal cells. In CA3, the neurons are larger and arranged in 2-5 layers with thick axon hillock (Paxinos & Watson, 1996).…”

“…Wyss et al (1979) added that the anatomicalization of dentate gyrus around the free end of the hippocampus proper facilitates the repeated circuit of information through nerve fibers between the entorhinal cortex, hippocampus proper, dentate gyrus, and subiculum. Although, Gori et al (2018) added that the molecular layer of dentate gyrus appeared in contact with the molecular layer of the hippocampus.…”