Influences of Scent on Autonomic Nervous System and Current Perception Threshold

2.50
Hdl Handle:
http://hdl.handle.net/10755/151981
Type:
Presentation
Title:
Influences of Scent on Autonomic Nervous System and Current Perception Threshold
Abstract:
Influences of Scent on Autonomic Nervous System and Current Perception Threshold
Conference Sponsor:Sigma Theta Tau International
Conference Year:2011
Author:Saeki, Yuka, PhD
P.I. Institution Name:Tsukuba University
Title:Professor
Co-Authors:Ayako Tsunoda RN, Graduate Student
[22nd International Nursing Research Congress - Research Presentation] - Purpose: This study was designed to investigate whether good or uncomfortable scent influences autonomic nervous system and current perception threshold (CPT) in human.
Methods:  Healthy subjects with normal sense of smell (n=22, F; n=10, M; n=12, 23 + 3 yrs.) inhaled diluted bergamot oil as a good scent, diluted ammonia water as an uncomfortable odor and distilled water as a control for 5 min.  Electrocardiogram (ECG) as autonomic functions and CPT and Visual Analogue Scale (VAS) as subjective sensation were measured.  CPT was conducted by microelectrical stimulation of sine wave of 5 Hz or 250 Hz to epidermis of forearm.  Electrical stimulation at 5 Hz and 250 Hz has been known to activate unmyelinated sensory nerve fiber (C fiber) and small myelinated sensory nerve fiber (A-delta fiber), respectively.  Approval for the present study was obtained from University of Tsukuba Ethical Committee.
Results: Following inhalation of bergamot, R-R interval of ECG and high frequency component (HFC) of heart rate variability, which reflects parasympathetic nerve activity, increased significantly, while the ratio of low frequency component (LFC)and HFC (LFC//HFC), which reflects sympathetic nerve activity, decreased significantly.  These results suggest that inhaling comfortable scent like bergamot oil might bring out relaxation in autonomic nervous system.  Furthermore, subjective sensation measured by VAS showed significantly comfortable by inhaling bergamot compared with ammonia or water.  CPT did not change by inhaling any scent.  However, CPT showed significantly high value in male rather than that of female in either stimulation at 5 and 250 Hz during water.
Conclusion: It is suggested that inhaling good scent must cause relaxation in both physical and mental  condition, although not influences CPT.
Repository Posting Date:
26-Oct-2011
Date of Publication:
17-Oct-2011
Sponsors:
Sigma Theta Tau International

Full metadata record

DC FieldValue Language
dc.typePresentationen_GB
dc.titleInfluences of Scent on Autonomic Nervous System and Current Perception Thresholden_GB
dc.identifier.urihttp://hdl.handle.net/10755/151981-
dc.description.abstract<table><tr><td colspan="2" class="item-title">Influences of Scent on Autonomic Nervous System and Current Perception Threshold</td></tr><tr class="item-sponsor"><td class="label">Conference Sponsor:</td><td class="value">Sigma Theta Tau International</td></tr><tr class="item-year"><td class="label">Conference Year:</td><td class="value">2011</td></tr><tr class="item-author"><td class="label">Author:</td><td class="value">Saeki, Yuka, PhD</td></tr><tr class="item-institute"><td class="label">P.I. Institution Name:</td><td class="value">Tsukuba University</td></tr><tr class="item-author-title"><td class="label">Title:</td><td class="value">Professor</td></tr><tr class="item-email"><td class="label">Email:</td><td class="value">yukaS@md.tsukuba.ac.jp</td></tr><tr class="item-co-authors"><td class="label">Co-Authors:</td><td class="value">Ayako Tsunoda RN, Graduate Student</td></tr><tr><td colspan="2" class="item-abstract">[22nd International Nursing Research Congress - Research Presentation] - Purpose:&nbsp;This study was designed to investigate whether good or uncomfortable scent influences autonomic nervous system and current perception threshold (CPT) in human. <br/>Methods:&nbsp;&nbsp;Healthy subjects with normal sense of smell (n=22, F; n=10, M; n=12, 23 + 3 yrs.) inhaled diluted bergamot oil as a good scent, diluted ammonia water as an uncomfortable odor and distilled water as a control for 5 min.&nbsp; Electrocardiogram (ECG) as autonomic functions and CPT and Visual Analogue Scale (VAS) as subjective sensation were measured. &nbsp;CPT was conducted by microelectrical stimulation of sine wave of 5 Hz or 250 Hz to epidermis of forearm.&nbsp; Electrical stimulation at 5 Hz and 250 Hz has been known to activate unmyelinated sensory nerve fiber (C fiber) and small myelinated sensory nerve fiber (A-delta fiber), respectively. &nbsp;Approval for the present study was obtained from University of Tsukuba Ethical Committee. <br/>Results:&nbsp;Following inhalation of bergamot, R-R interval of ECG and high frequency component (HFC) of heart rate variability, which reflects parasympathetic nerve activity, increased significantly, while the ratio of low frequency component (LFC)and HFC (LFC//HFC), which reflects sympathetic nerve activity, decreased significantly. &nbsp;These results suggest that inhaling comfortable scent like bergamot oil might bring out relaxation in autonomic nervous system. &nbsp;Furthermore, subjective sensation measured by VAS showed significantly comfortable by inhaling bergamot compared with ammonia or water.&nbsp; CPT did not change by inhaling any scent.&nbsp; However, CPT showed significantly high value in male rather than that of female in either stimulation at 5 and 250 Hz during water. <br/>Conclusion:&nbsp;It is suggested that inhaling good scent must cause relaxation in both physical and mental&nbsp; condition, although not influences CPT.</td></tr></table>en_GB
dc.date.available2011-10-26T11:20:07Z-
dc.date.issued2011-10-17en_GB
dc.date.accessioned2011-10-26T11:20:07Z-
dc.description.sponsorshipSigma Theta Tau Internationalen_GB
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