| Project/Area Number |
15590163
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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 |
General anatomy (including Histology/Embryology)
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| Research Institution | Kagoshima University |
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Principal Investigator |
OGATA Shigemitsu Kagoshima University, Faculty of Medicine, Professor, 医学部, 教授 (40305173)
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| Co-Investigator(Kenkyū-buntansha) |
TAMATSU Yuichi Kagoshima University, Graduate School of Medical and Dental Sciences, Associate Professor, 大学院・医歯学総合研究科, 助教授 (80266569)
MINE Kazuharu Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (50209839)
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| Project Period (FY) |
2003 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2005: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2004: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 2003: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Hypoglossal nerve / Lingual nerve / Hypoglossal-Lingual-communication / 3D-reconstruction / Silver-iron stain method / Motor nerve / Sensory nerve / Micro-CT |
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| Research Abstract |
As a part of the work to accomplish the precise topography of the intralingual nerves, the peripheral distribution of the hypoglossal and lingual nerves in the human tongue was studied with special attention to the communication between those. The average courses of each nerve were summarized as follows : 1)The main trunk of the hypoglossal nerve (HN) rounds the anterior border of the hyoglossus muscle (HGM), bends medially with an acute angle, and enters the muscular fibers of the genioglossus muscle (GGM). Near the median plane, the HN changes direction anterosuperiorly, and runs for the dorsum of the tongue. On reaching the layer of the longitudinalis superior muscle, the HN comes close to the deep lingual artery. The HN ramifies, radiates parallel to the dorsum of the tongue, and terminates within the intrinsic muscular fibers at the lateral border and apex of the tongue. 2)The lingual nerve (LN) forms a plexiform extralingual connection with the HN near the anterior border of the HGM. There the LN furcatets a branch to the mucosa of the central margin of the tongue. Turning the anterosuperior border of the HGM medially, the LN gives off a branch that is distributed to the medial mucosa of the body of the tongue. The main trunk of the LN passes anterosuperiorly through the space between the longitudinalis inferior muscle and the GGM, branches off the sensory twigs to the anterior third of the tongue, and reach the apex. 3)The communications between the HN and LN are formed at the extralingual site lateral to the HGM, at the intralingual site around the GGM, and near the apex of the tongue.
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