| Project/Area Number |
12671776
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Morphological basic dentistry
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| Research Institution | Kagoshima University |
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Principal Investigator |
UEMURA Masanori Kagoshima University, Dental School, Professor, 歯学部, 教授 (00034215)
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| Co-Investigator(Kenkyū-buntansha) |
KAJI Takao Kagoshima University, Dental School, Research Associate, 歯学部, 助手
YAMANAKA Atsushi Kagoshima University, Dental School, Research Associate, 歯学部, 助手
TABATA Makoto Kagoshima University, Dental School, Associate Professor, 歯学部, 助教授 (20243248)
尾木 秀直 鹿児島大学, 歯学部, 助手 (10315426)
中嶋 充生 鹿児島大学, 歯学部, 助手 (90217711)
安井 金也 鹿児島大学, 歯学部, 助教授 (70191111)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2001: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2000: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | thalamus / VPMpc / insulacortex / taste / rat / parabrachial nucleus / insular cortex |
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| Research Abstract |
Projections from the thalamic gustatory nucleus, i.e. the parvicellular part of the posteromedial ventral thalamic nucleus (VPMpc) to the forebrain regions were studied in the rat by the tract-tracing methods with anterograde tracer (biotinylated dextran amine: BDA) and anterogfade/retrograde tracer (wheat-germ aggluti ni n-horseradish peroxidase: WGA-HRP). After BDA injection into the VPMpc, terminal labeling was observed in the insular cortex, amygdaloid complex, and fundus striati. The terminal labeling in the amygdaloid complex was distributed in dorsolateral area of the rostral part of the lateral amygdaloid nucleus and the rostral part of the lateral subdivision of the central amygdaloid nucleus. The terminal labeling in the central amygdaloid nucleus extended to the fundus striati. The retrograde tracing study with WGA-HRP revealed that the projection fibers from the VPMpc to the amygdaloid complex originated from the medial part of the VPMpc and also from the thalamic area medial to the VPMpc. In the rats injected with Fluoro-Gold and WGA-HRP respectively into the insular cortex and amygdaloid complex, no double-labeled neuronal cell bodies were found in the VPMpc, although neurons labeled singly with Fluoro-Gold were intermingled with those singly labeled with WGA-HRP in the- medial part of the VPMpc. The results indicated that VPMpc neurons projecting to the amygdaloid complex constituted a population different from VPMpc neurons projecting to the insular cortex.
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