| Project/Area Number |
09640840
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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 |
人類学(含生理人類学)
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| Research Institution | SAITAMA MEDICAL SCHOOL JUNIOR COLLEGE |
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Principal Investigator |
KOJIMA Ryuhei Saitama Medical School Junior College, Department of Physical Therapy, Associate Professor, 理学・療法学科, 助教授 (20241804)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | Japanese macaque / Macaca fuscata / epaxial muscles / muscle fiber types / muscle architecture / functional morphology / histochemistry / locomotion |
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| Research Abstract |
Muscle fiber type composition and muscle architecture of the thoracic and lumbar epaxial muscles were investigated in Japanese macaque (Macaca fuscata). Muscle fiber type composition was determined in whole sections of the muscles composing the epaxial musculature at upper, middle and lower thoracic and upper, middle and lower lumbar levels and muscle architecture was examined in the thoracic epaxial muscles, i.e. the iliocostalis thoracis, longissimus thoracis and spinalis thoracis muscles. Histochemical and architectural properties varied among and within the muscles. In the lumbar region the sacrospinalis muscle lying laterally had many type II (fast twitch) fibers. In the spinalis-transversospinalis system lying medially the superficial portion had many type II fibers and the central portion had more type I (slow twitch) fibers. The medial deep portion of the sacrospinalis muscle had extremely large number of type I fibers (70-90%). This muscle portion on the sections corresponded with the short muscle bundles connecting between vertebrae lying nearly each other. In the thoracic region the iliocostalis thoracis muscle lying laterally was composed of many short bundles and had more type I fibers than the longissimus thoracis muscle which was lying in the middle of the thoracic epaxial muscles and composed of long muscle bundles. The middle and lower thoracic portion of the longissimus thoracis muscle had large muscle volume. These data suggest functional differentiation among and within the muscles composing the thoracic and lumbar epaxial musculature.
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