| Project/Area Number |
21792265
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Lifelong developmental nursing
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| Research Institution | Nagasaki University |
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Principal Investigator |
INOUE Takao Nagasaki University, 大学院・医学系研究科, 学術研究員 (80513225)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 聴覚 / 乳汁分泌 / NIRS / Hypersonic Effect / 超音波 / 泣き声 / オキシトシン |
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| Research Abstract |
In this study, we used noninvasive physiological measurement of blood flow responses to provide evidence that infant crying sounds containing high-frequency components (HFCs) above the audible range significantly affect the breast blood flow of lactating mothers. None of the subjects recognized the HFC as sound when it was presented alone. Nevertheless, the values of oxy-hemoglobin concentration using NIRS (near-infrared stereoscopy) recorded from the both breasts significantly increased when the subjects were exposed to full-range sound compared with an otherwise identical sound from which the HFC was removed. Physiological evaluation indicates that the subjects felt the infant crying sounds containing an HFC below the level of consciousness. It might be important for normal biological communication between mother and child during the period when lactation is establishing.
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