Search Results - "Sawada, Yukihiro"

How carryover has an effect on recovery measures related to the area under the curve: theoretical and experimental investigations using cardiovascular parameters by Sawada, Yukihiro, Kato, Yuichi

“…This study examines cardiovascular recovery from mental stress. Investigating the absence or presence of carryover effect, the effect of the final reactivity…”
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Stability analysis of a single-species logistic model with time delay and constant inflow by Sawada, Yukihiro, Takeuchi, Yasuhiro, Dong, Yueping

“…In this paper, we consider a single-species logistic model with Gamma type continuous time delay and constant inflow. By the linear chain trick, the system of…”
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Cardiovascular responses during two kinds of mental arithmetic tasks by Matsumura, Kenta, Sawada, Yukihiro

“…Eighteen young females performed two kinds of mental tasks, an Internally-Generated Mental Arithmetic task (IGMA: serial subtraction) and an…”
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Examination of normalized pulse volume–blood volume relationship: toward a more valid estimation of the finger sympathetic tone by Tanaka, Gohichi, Sawada, Yukihiro

“…The pulsatile ac component (Δ I) superimposed on the transmitted dc components ( I: tissue plus blood) are obtained from a near-infrared finger…”
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Finger arterial compliance as determined by transmission of light during mental stress and reactive hyperaemia by Tanaka, Gohichi, Sawada, Yukihiro, Matsumura, Kenta, Nagano, Yuichiro, Yamakoshi, Ken-Ichi

“…A near-infrared finger photoplethysmogram adopting a wavelength of 810 nm provides data pertaining to the pulsatile a.c. component of finger blood flow (delta…”
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Assessment of baroreceptor reflex function during mental stress and relaxation by Steptoe, A, Sawada, Y

“…This paper describes a method of measuring baroreceptor cardiac reflex sensitivity noninvasively from spontaneous patterns of blood pressure and interbeat…”
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Mirror Tracing and the Provocation of Vascular-Dominant Reaction Pattern Through Heightened Attention by Sawada, Yukihiro, Nagano, Yuichiro, Tanaka, Gohichi

“…After a hint from Lang et al.'s (1997) defence cascade, researchers considered cognitive process experienced when encountering mental stress to be composed of…”
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Reproducible increases in blood pressure during intermittent noise exposure: underlying haemodynamic mechanisms specific to passive coping by Sawada, Y

“…The purpose of the present study was to investigate the reproducibility of the increases in blood pressure found in our recent study on exposure to…”
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A novel photoplethysmography technique to derive normalized arterial stiffness as a blood pressure independent measure in the finger vascular bed by Tanaka, Gohichi, Yamakoshi, Ken-ichi, Sawada, Yukihiro, Matsumura, Kenta, Maeda, Kimihito, Kato, Yuichi, Horiguchi, Masami, Ohguro, Hiroshi

“…Stiffening of the small artery may be the earliest sign of arteriosclerosis. However, there is no adequate method for directly assessing small arterial…”
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Application of finger arterial compliance-blood pressure function for an evaluation of the sympathetically mediated vascular tone by Tanaka, Gohichi, Sawada, Yukihiro, Matsumura, Kenta, Nagano, Yuichiro, Yamakoshi, Ken-ichi

“…Normalized pulse volume (NPV, Sawada, Tanaka, & Yamakoshi, 2001) was calculated on a beat-to-beat basis by dividing the ac component by the dc component in…”
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Normalized pulse volume (NPV) derived photo-plethysmographically as a more valid measure of the finger vascular tone by Sawada, Yukihiro, Tanaka, Gohichi, Yamakoshi, Ken-ichi

“…Normalized pulse volume (NPV) was advocated as a more valid measure for the assessment of finger vascular tone. Based on the optical model in the finger tip…”
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Cardiac vagal withdrawal during stressful tasks estimated by the baroreflex sensitivity and respiratory sinus arrhythmia by Tanaka, G, Sawada, Y, Fujii, R

“…The primary purpose of this study was to compare the changes in baroreflex sensitivity (BRS) with those in respiratory sinus arrhythmia (RSA) during mental…”
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HEMODYNAMIC EFFECTS OF SHORT-TERM NOISE EXPOSURE : Comparison of Steady State and Intermittent Noise at Several Sound Pressure Levels by SAWADA, YUKIHIRO

“…The purpose of the present study was to investigate the extent of blood pressure elevation during noise exposure, to elucidate the underlying hemodynamic…”
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A hemodynamic comparison of cardiovascular stress responses during mental arithmetic and reaction time tasks by Tanaka, G, Sawada, Y, Fujii, R

“…The primary purpose of this study was to examine the covariation between preload (PL) and other cardiovascular stress responses during mental arithmetic (MA)…”
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Vascular unloading method for noninvasive measurement of instantaneous arterial pressure: applicability in psychophysiological research by Sawada, Y, Yamakoshi, K, Shimazu, H

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Beat-by-beat double-normalized pulse volume derived photoplethysmographically as a new quantitative index of finger vascular tone in humans by Tanaka, G, Sawada, Y, Yamakoshi, K

“…Near-infrared finger photoplethysmograms were recorded and double-normalized pulse volumes (DNPV = DeltaV(b)/V(b); V(b) = total blood volume in the fingertip,…”
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A correlation analysis between pulse transit time and instantaneous blood pressure measured indirectly by the vascular unloading method by Sawada, Y, Yamakoshi, K

“…Linear correlation coefficients (r) between pulse transit time (PTT) and blood pressure (BP) were evaluated on within-subject by within-condition level…”
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Effects of lead acetate on guinea pig—Cochear microphonics, action potential, and motor nerve conduction velocity by Yamamura, Kohtaroh, Maehara, Naoki, Terayama, Kazuyuki, Ueno, Nobumasa, Kohyama, Akio, Sawada, Yukihiro, Kishi, Reiko

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Vascular-volume compensation method for noninvasive measurement of instantaneous arterial blood pressure: its usefulness in psychological research by Sawada, Y, Yamakoshi, K, Shimazu, H

“…A new method of measuring blood pressure proposed previously by us (1980) was examined to evaluate its usefulness and applicability for psychological research…”
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Degree of correlation between pulse transit time (PTT) and arterial blood pressure: a question to its utility in blood pressure biofeedback (author's transl) by Sawada, Y

“…PTT and systolic blood pressure were measured 20 times at rest and 10 times with Valsalva's Maneuvre from each of five subjects. Linear correlation…”
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