Differential projections of the densocellular and intermediate parts of the hyperpallium in the pigeon (Columba livia).

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dc.contributor.author Atoji, Yasuro en
dc.contributor.author Sarkar, Sonjoy en
dc.contributor.author Wild, John en
dc.date.accessioned 2019-09-22T21:58:24Z en
dc.date.issued 2018-01 en
dc.identifier.issn 0021-9967 en
dc.identifier.uri http://hdl.handle.net/2292/47884 en
dc.description.abstract The visual Wulst in birds shows a four-layered structure: apical part of the hyperpallium (HA), interstitial part of HA (IHA), intercalated part of hyperpallium (HI), and densocellular part of hyperpallium (HD). HD also connects with the hippocampus and olfactory system. Because HD is subjacent to HI, the two have been treated as one structure in many studies, and the fiber connections of HD have been examined by afferents and efferents originating outside HD. However, to clarify the difference between these two layers, they need to be treated separately. In the present study, the fiber connections of HD and HI were analyzed with tract-tracing techniques using a combination of injections of cholera toxin subunit B (CTB) for retrograde tracing and biotinylated dextran amine (BDA) for anterograde tracing. When the two tracers were bilaterally injected in HD, a major reciprocal connection was seen with the dorsolateral subdivision (DL) of the hippocampal formation. When CTB and BDA were bilaterally injected in HI, strong reciprocal connections were found between HI and HA. Next, projection neurons in HD and HI were examined by double staining for CTB combined with vesicular glutamate transporter 2 (vGluT2) mRNA in situ hybridization. After CTB was injected in DL or HA, many neurons revealed CTB+/vGluT2+ in HD or HI, respectively. Furthermore, in situ hybridization showed that DL and HA contained neurons expressing various subunits of ionotropic glutamate receptors: AMPA, kainate, and NMDA types. These results suggest that glutamatergic neurons in HD and HI project primarily to DL and HA, respectively. en
dc.format.medium Print-Electronic en
dc.language eng en
dc.relation.ispartofseries The Journal of comparative neurology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.subject Hippocampus en
dc.subject Olfactory Bulb en
dc.subject Afferent Pathways en
dc.subject Efferent Pathways en
dc.subject Animals en
dc.subject Columbidae en
dc.subject Biotin en
dc.subject Dextrans en
dc.subject Cholera Toxin en
dc.subject RNA, Messenger en
dc.subject Female en
dc.subject Male en
dc.subject Vesicular Glutamate Transport Protein 2 en
dc.title Differential projections of the densocellular and intermediate parts of the hyperpallium in the pigeon (Columba livia). en
dc.type Journal Article en
dc.identifier.doi 10.1002/cne.24328 en
pubs.issue 1 en
pubs.begin-page 146 en
pubs.volume 526 en
dc.rights.holder Copyright: The author en
dc.identifier.pmid 28891049 en
pubs.end-page 165 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Journal Article en
pubs.elements-id 668634 en
dc.identifier.eissn 1096-9861 en
pubs.record-created-at-source-date 2017-09-12 en
pubs.dimensions-id 28891049 en

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