Validity of pulse oximetry during maximal exercise in normoxia, hypoxia, and hyperoxia

Yoshiki YAMAYA, Harm Jan Bogaard, Peter D. Wagner, +2

Journal of Applied Physiology

Estimation of Melanin and Hemoglobin Using Spectral Reflectance Images Reconstructed from a Digital RGB Image by the Wiener Estimation Method

Izumi Nishidate, Takaaki Maeda, Kyuichi Niizeki, +1

Sensors

EngineeringColor CorrectionOxygen SaturationDermatologyWiener Estimation Method +14

Noninvasive imaging of human skin hemodynamics using a digital red-green-blue camera

Izumi Nishidate, Noriyuki Тanaka, Tatsuya Kawase, +5

Journal of Biomedical Optics

EngineeringSkin TissueBiomedical EngineeringDermatologyBlood Flow +22

Interaction among cardiac, respiratory, and locomotor rhythms during cardiolocomotor synchronization

Kyuichi Niizeki, Koichi Kawahara, Yuri Miyamoto

Journal of Applied Physiology

Cardiac MuscleMotor ControlCardiovascular FunctionSocial SciencesMovement Analysis +16

Unconstrained cardiorespiratory and body movement monitoring system for home care

Kyuichi Niizeki, Izumi Nishidate, Kazuyuki Uchida, +1

Medical & Biological Engineering & Computing

KinesiologyAssistive TechnologyEngineeringRemote Patient MonitoringDigital Health +10

β‐Adrenergic or parasympathetic inhibition, heart rate and cardiac output during normoxic and acute hypoxic exercise in humans

Susan R. Hopkins, Harm Jan Bogaard, Kyuichi Niizeki, +3

The Journal of Physiology

Physical ActivityHealthy SubjectsAcute HypoxiaSympathetic ActivationKinesiology +16

Incoherent oscillations of respiratory sinus arrhythmia during acute mental stress in humans

Kyuichi Niizeki, Tadashi Saitoh

American Journal of Physiology-Heart and Circulatory Physiology

BiofeedbackNeuropsychologyAffective NeuroscienceRespiratory Sinus ArrhythmiaIncoherent Oscillations +26

Visualizing of skin chromophore concentrations by use of RGB images

Izumi Nishidate, Kiyohiro Sasaoka, Testuya Yuasa, +3

Optics Letters

EngineeringSkin TissueDigital Rgb ImagesBiomedical EngineeringDermatology +16

Visualizing depth and thickness of a local blood region in skin tissue using diffuse reflectance images

Izumi Nishidate, Takaaki Maeda, Yoshihisa Aizu, +1

Journal of Biomedical Optics

Medical UltrasoundEngineeringSkin TissueBiomedical EngineeringDermatology +17

Role of the autonomic nervous system in the reduced maximal cardiac output at altitude

Harm Jan Bogaard, Susan R. Hopkins, Yoshiki YAMAYA, +3

Journal of Applied Physiology