scholarly journals Study of the physiological significance of the Ammon's horn (cornu Ammonis) by the method of loss of function

2020 ◽  
Vol VIII (4) ◽  
pp. 11-51
Author(s):  
V. P. Osipov
Keyword(s):  
Research Methods ◽  
Physiological Significance ◽  
Loss Of Function ◽  
Ammon's Horn ◽  
Cornu Ammonis ◽  
Ammon’S Horn

The study of the physiological significance of the Ammon's horn but the method of loss of function has been undertaken until now by only a few individuals; although the conclusions they made from their experiments on animals are partly identical with each other and even coincide, albeit incompletely, with the conclusions of other authors who worked on other research methods (Edinger, Zuckerkandl - comparative anatomical, embryological, anatomical) nevertheless, with the closest acquaintance with the works of these authors, one cannot but come to the conclusion that their conclusions were made on very shaky grounds.

Postnatal Development of the Hippocampus in Male Albino Rats: A Histomorphometric Study

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A A A Baraka ◽  
K A Hafez ◽  
A I A Othman ◽  
A M M Sadek
Keyword(s):  
Dentate Gyrus ◽  
Postnatal Development ◽  
Learning And Memory ◽  
Hippocampal Formation ◽  
Critical Role ◽  
Mammalian Brain ◽  
Albino Rats ◽  
Ammon's Horn ◽  
Hippocampus Proper ◽  
Ammon’S Horn

Abstract Introduction In recent year deterioration in cognitive, learning, and memory become one of the significant problems in human life. Hippocampus is a pivotal part of the brain’s limbic system which serves a critical role in memory, learning process and regulating the emotions. In most regions of the brain, neurons are generated only at specific periods of early development, and not born in the adulthood. In contrast, hippocampal neurons are generated throughout development and adult life. The hippocampal dentate gyrus was reported to be one of the few regions of the mammalian brain where neurogenesis continue to occur throughout adulthood. The neurogenesis in the dentate gyrus was thought to play an important role in hippocampus-dependent learning and memory. The hippocampal formation is composed of the hippocampus proper, the dentate gyrus and the subiculum. The hippocampus proper is the largest part and is subdivided into fields designated as Cornu Ammonis or Ammon’s horn (CA) from CA1 to CA4. Ammon's horn is continuous with the subiculum, which acts as the main output source of the hippocampal formation. Aim of the Study To study the postnatal development of the hippocampal formation. Materials and Methods Five male albino rats from the following postnatal ages day 1, week 1, week 2, week3 and week 4 were studied by histological, immunohistochemical, and morphometric methods. Results The general architecture of the hippocampus proper with its polymorphic, pyramidal, and molecular layers was present at day1, whereas the details of the adult structure appeared at week 2. In the dentate gyrus, distinct lamination appeared at week 1 and its maturation continued with the production of neurons at the interhilar zone that peaked at week 2. The number and density of pyramidal axons and dendrites increase by age. Astrocytes increased in size and staining affinity for glial filaments, and acquired a stellate shape with age. Furthermore, the number of granule cell layers increased concomitantly with the increase in thickness of the molecular and polymorphic layers of both the hippocampus proper and the dentate gyrus. Conclusion The important sequences of events in the growth and maturation of the hippocampal formation in male albino rat occurred in the first 2 postnatal weeks.

scholarly journals Corpora Amylacea and Heat Shock Protein 27 in Ammon's Horn Sclerosis

2000 ◽  
Vol 59 (8) ◽  
pp. 698-706 ◽  
Author(s):  
Sibel Erdamar ◽  
Zhen-Qing Zhu ◽  
Winifred J. Hamilton ◽  
Dawna L. Armstrong ◽  
Robert G. Grossman
Keyword(s):  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 27 ◽  
Corpora Amylacea ◽  
Ammon's Horn ◽  
Ammon's Horn Sclerosis ◽  
Ammon’S Horn ◽  
Ammon’S Horn Sclerosis

scholarly journals Neonatal Nonhandling andIn UteroPrenatal Stress Reduce the Density of NADPH-Diaphorase-Reactive Neurons in the Fascia Dentata and Ammon’s Horn of Rats

1997 ◽  
Vol 17 (14) ◽  
pp. 5599-5609 ◽  
Author(s):  
R. R. Vaid ◽  
B. K. Yee ◽  
U. Shalev ◽  
J. N. P. Rawlins ◽  
I. Weiner ◽  
...  
Keyword(s):  
Nadph Diaphorase ◽  
Ammon's Horn ◽  
Fascia Dentata ◽  
Ammon’S Horn
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