P-25 Changes in cerebral blood flow caused by smelling the odor of wood

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  • BAMBA,Ikuko
    Department of Environmental Medicine and Behavioral Science, Kinki University Faculty of Medicine
  • AZUMA,Kenichi
    Department of Environmental Medicine and Behavioral Science, Kinki University Faculty of Medicine

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  • P-25 木材等のにおい刺激による脳血流量の経時変化(ポスターセッションII)

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Abstract

It has been recently recognized that wood will be used more commonly in public and living spaces in Japan. This study was conducted to clarify the psychological and physiological effects of the odor of wood. We used functional near infrared spectroscopy (fNIRS) to investigate the changes in cerebral blood flow (oxyHb) in 42 channels of the frontal lobes of subjects who smelled samples. In this experiment, 13 healthy university students smelled samples of cedar, hinoki, plywood, or rubber, or smelled no sample. Subjects reported the smell of samples other than for "no sample," and they reported an unpleasant smell only for rubber. Using the results from fNIRS measurements, we calculated z-score using the change in oxyHb before and after sample presentation. The cerebral blood flow increased significantly only when the subjects smelled poplar plywood. Since it was determined by analysis that the poplar plywood released more formaldehyde than other samples, an association between cerebral blood flow and release of formaldehyde from wood was inferred. However, an association between cerebral blood flow and the subjects' evaluation of the odor was not affirmed.

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