| Project/Area Number |
24700611
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical education
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| Research Institution | Sapporo International University |
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Principal Investigator |
KIYOTA TAKEO 札幌国際大学, 人文学部, 准教授 (40434956)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 姿勢 / 発達 / 筋厚 / 筋電図 / 超音波 / 幼児 |
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| Research Abstract |
We investigated developmental changes in activation patterns of postural muscles during arm flexion and the thickness of lower-limb muscles. A total of 176 children participated. In response to a visual stimulus, subjects initiated arm flexion. Electromyogram activity of the focal and postural muscles were recorded. Time differences between the onset in focal and the postural muscles were calculated. The muscle thickness of the soleus (SOL) and gastrocnemius medialis (GcM) was measured using an ultrasound scanner.
The results were as follows: (1) Developmental changes in the postural muscle activation during arm flexion in the childhood is earlier in the trunk than in the thigh and lower-limb, and even in the latter half of the childhood, the postural control accompanied by the muscle activation in the thigh and lower-limb has not attained the adult-like postural control yet. (2) Thickness of SOL and GcM was increased with age, especially the GcM greatly increased over 7-8 years old.
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