Physiological responses to repeated inhalations of tree odors in infants

возрастная физиология inhalations ингаляции tree odors odors запахи infants младенцы дети раннего возраста coniferous trees хвойные деревья heart rates trees деревья частота сердечных сокращений odorous components сердечные сокращения пахучие компоненты

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136 Section PHYSIOLOGICAL ANTHROPOLOGY PHYSIOLOGICAL RESPONSES TO REPEATED INHALATIONS OF TREE ODORS IN INFANTS Tsunetsugu Yuko1 , Yamashita Yasuko2 1Forestry and Forest Products Research Institute, Tsukuba, Japan 2Central Research Center, Pigeon Corporation, Tsukubamirai, Japan We investigated the physiological responses to inhalations of odorous components of coniferous trees in infants. <...> Each infant was exposed for two or three minutes to three different odors of α-pinene, limonene and a control (air). <...> During this rest-inhalation-rest course, cerebral activity (NIRO200, Hamamatsu Photonics KK.) and an electrocardiogram (Polymate II AP-216, TEAC) were continuously measured. <...> Heart rate and heart rate variability were calculated from the electrocardiogram. <...> The cerebral activity was enhanced in response to all three odors including the control. <...> The heart rate signifi cantly decreased in response to α-pinene (p<0.05), but not to limonene and the control. <...> The heart rate during the inhalations of the odors decreased as the number of repetition increased (p<0.01). <...> The sympathetic and parasympathetic nervous activities, which were assessed by heart rate variability analysis, did not show signifi cant changes. <...> Key words: near infrared spectroscopy, heart rate, heart rate variability, olfactory stimulation Contact information: Tsunetsugu Yuko, e-mail: yukot@ffpri.affrc.go.jp. <...> EFFECT OF SINUSOIDAL LOWER-BODY NEGATIVE PRESSURE ON CEREBRAL BLOOD FLOW AND EVENT-RELATED POTENSIALS Yoshida Hisao, Ootaka Masaki, Ishibashi Keita, Iwanaga Koichi Graduate School of Engineering, Chiba University, Chiba, Japan A decrease in central venous pressure caused by orthostatic stress reduces the cerebral blood fl ow. <...> Lower-body negative pressure is used as a perturbation to the cardiovascular system and has been applied to simulate the gravitational stress of orthostatic blood shift in humans. <...> However, little is known about how dynamic changes in the cerebral blood fl ow affect brain activity. <...> Using sinusoidal lower-body negative pressure (SLBNP) as a postural blood shift simulation and event-related potentials (ERPs) extracted from electroencephalograms (EEGs) of subjects engaged in an oddball task, we assessed whether mild blood pressure fl uctuations disturbed brain activity. <...> The middle cerebral arterial blood fl ow velocity (MCAv) and cerebral blood oxygenation (OxyHb) were measured <...>

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