Connectivity of the Claustrum–Endopiriform Complex with the Presubiculum and Hippocampal Regions in the Common Marmoset (Callithrix jacchus)

Author:

Honda Yoshiko12ORCID,Moriya‐Ito Keiko2,Shimokawa Tetsuya3,Kobayashi Yasushi4

Affiliation:

1. Department of Anatomy and Neurobiology, School of Medicine Tokyo Women's Medical University Tokyo Japan

2. Department of Brain and Neuroscience Tokyo Metropolitan Institute of Medical Science Tokyo Japan

3. Division of Anatomy and Embryology, Department of Developmental Biology and Functional Genomics Ehime University Toon Japan

4. Department of Anatomy and Neurobiology National Defense Medical College Tokorozawa Japan

Abstract

ABSTRACTWe have investigated the hippocampal connectivity of the marmoset presubiculum (PreS) and reported that major connections of PreS in the rat were conserved in the marmoset. Moreover, our results indicated the presence of several additional projections that were almost absent in the rat brain, but abundant in the marmoset, such as direct projections from CA1 to PreS. However, little is known about the connectivity between the frontal brain regions and PreS or hippocampal formation. Therefore, we investigated the distribution of cells of the origins and terminals of the presubicular and hippocampal projections in the marmoset frontal brain regions using the retrograde and anterograde tracer cholera toxin B subunit. In cases of tracer injections into all layers of PreS, many neurons and terminals were labeled in the claustrum–endopiriform (Cl–En) complex almost entirely along the rostrocaudal axis. Even in cases where the injection site involved the superficial (not deep) layers of PreS, labeled neurons and terminals were distributed over a wide rostrocaudal range of the Cl–En complex, but their number and density were significantly lower than the whole‐layer injection cases. In cases where the injection site was confined to the hippocampal formation, labeled cells and terminals were localized at a restricted portion of the Cl–En complex. Here, we demonstrate for what we believe to be the first time the strong, reciprocal connections of the Cl–En complex with PreS and projections from the Cl–En complex to the hippocampal regions (CA1 and the subiculum) in the marmoset. Our findings indicate that the Cl–En complex may exert a strong influence on the cortical and subcortical outputs from PreS and, in turn, the entire memory circuitry in the marmoset brain.

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3