Relationships Among the Hippocampus,Dentate Gyrus,Mammillary Body,Fornix, and Anterior Commissure from a Viewpoint of Elements |
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Authors: | Yoshiyuki Tohno Setsuko Tohno Nutcharin Ongkana Patipath Suwannahoy Cho Azuma Takeshi Minami Apichat Sinthubua Pasuk Mahakkanukrauh |
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Institution: | (1) Department of Anatomy, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand;(2) Department of Anatomy, Nara Medical University School of Medicine, Kashihara Nara, 634-8521, Japan;(3) Laboratory of Environmental Biology, Department of Life Science, Faculty of Science and Engineering, Kinki University, Higashi-Osaka Osaka, 577-8502, Japan |
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Abstract: | To elucidate the relationships among the brain regions belonging to the limbic system, the authors investigated the relationships
among the hippocampus, dentate gyrus, mammillary body, and fornix, using the anterior commissure as a control, from a viewpoint
of elements. After ordinary dissections at Nara Medical University were finished, the hippocampi, dentate gyri, mammillary
bodies, fornices, and anterior commissures were resected from identical cerebra of the subjects. The subjects consisted of
23 men and 23 women, ranging in age from 70 to 101 years (average age = 83.5 ± 7.5 years). After ashing with nitric acid and
perchloric acid, element contents were determined by inductively coupled plasma-atomic emission spectrometry. With regard
to seven elements of Ca, P, S, Mg, Zn, Fe, and Na, it was examined whether there were significant correlations among the hippocampus,
dentate gyrus, mammillary body, fornix, and anterior commissure. It was found that there were extremely or very significant
direct correlations among all of the five brain regions of the hippocampus, dentate gyrus, mammillary body, fornix, and anterior
commissure in the P content. Likewise, with regard to the Fe content, there were significant direct correlations among the
four brain regions belonging to the limbic system, except for the anterior commissure. In both the Ca and Zn contents, there
were extremely or very significant direct correlations among the hippocampus, dentate gyrus, and mammillary body of the gray
matter. |
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