| Project/Area Number |
61570030
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
神経解剖学
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| Research Institution | Mie University (1987)
Kagoshima University (1986) |
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Principal Investigator |
NAKANO KATSUMA Mie University, 医学部, 教授 (30024623)
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| Co-Investigator(Kenkyū-buntansha) |
KAYAHARA TETSURO Mie University School of Medicine, Assistant, 医学部, 助手 (20024705)
SAKASHITA SAKAE Mie University School of Medicine, Assistant, 医学部, 助手 (00024638)
TOKUSHIGE AKINORI Kagoshima University School of Medicine, Assistant, 医学部, 助手 (20128440)
HASEGAWA YASUO Kagoshima University School of Medicine, Assistant, 医学部, 助手 (20156326)
NAKAGAWA SHIRO Kagoshima University School of Medicine, Associate Professor, 医学部, 助教授 (70073666)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1987: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Motor cortex / Premotor cortex / Supplementary motor cortex / VA-VL complex / Basal ganglia / Substantia nigra / Cerebellar nuclei / 視床 / 基底核 / 大脳皮質運動前野 / 前頭連合野 |
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| Research Abstract |
Fiber connections of the motor thalamic nuclei were studied in the monkey, using axonal transport techniques (autoradiographic and HRP methods). The following major findings were obtained: The topographic organization seems to exist between the subdivisions of motor and premotor areas and the motor thalamic relay nuclei. The lateral part of the rostral VApc(pars principalis) is reciprocally connected with areas 6DC (dorsal part of caudal area 6) and 6DR (dorsal part of rostral area 6). The dorsal to lateral parts of the caudal VApc and the dorsolateral VLc are connected reciprocally with are 6DC, and the dorsalto medial parts of the caudal VApc and dorsomedial VLc with area 6DR. The ventromedial part of VApc is interconnected with the ventral part of area 6. The VLo is interconnected with the rostral part of area 4, and the VPLo with the caudal part of area 4. The VLc is reciprocally connected with the dorsal part of area 6 and the rostral area 4. No connections were observed between the VLc and the ventral area 6. The VLo and VApc receive afferent fibers mainly from the central or ventrolateral part of the medial pallidal segment.
The present studies also indicated the topographic relationship between the striatum and the thalamus. The medial part of the head of caudate nucleus (CN) recives afferent fibers from the VAmc, ventromedial part of parafascicular nucleus (Pf) and the medial part of the subthalamic nucleus (STN). The lateral part of the head CN receives afferent fibers from the VApc, dorsolateral Pf and medial STN. The putamen (Put) receives afferent fibers from the centromediane nucleus (CM), Vlo and lateral STN. In the latter connections, the dorsomedial CM projects to the dorsal Put, corresponding leg area of Kunzle, the ventral CM to the ventral Put corresponding to the face area, and the lateral CM to the intermediate Put corresponding to the arm area.
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