Journal ArticleDOI
The repeated sit-to-stand maneuver is a superior method for cardiac baroreflex assessment: a comparison with the modified Oxford method and Valsalva maneuver
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TLDR
Findings indicate the sit-to-stand method is a statistically reliable BRS assessment tool and suitable for the examination of baroreflex hysteresis.Abstract:
Baroreflex assessment has diagnostic and prognostic utility in the clinical and research environments, and there is a need for a reliable, simple, noninvasive method of assessment. The repeated sit...read more
Citations
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Journal ArticleDOI
Arterial Pressure, Heart Rate, and Cerebral Hemodynamics Across the Adult Life Span
Changyang Xing,Changyang Xing,Takashi Tarumi,Rutger L. Meijers,Rutger L. Meijers,Marcel Turner,Justin Repshas,Li Xiong,Kan Ding,Wanpen Vongpatanasin,Li Jun Yuan,Rong Zhang +11 more
TL;DR: Age-related alterations in beat-to-beat oscillations in arterial blood pressure, heart rate, cerebral blood flow, cardiac baroreflex sensitivity, and dynamic cerebral autoregulation across the adult life span are characterized.
Journal ArticleDOI
Dynamic Regulation of Cerebral Blood Flow in Patients With Alzheimer Disease
Rianne A.A. de Heus,Daan L.K. de Jong,Marit L. Sanders,Gerrita J. van Spijker,Madelijn H. Oudegeest-Sander,Maria T. E. Hopman,Brian A. Lawlor,Marcel G. M. Olde Rikkert,Jurgen A.H.R. Claassen +8 more
TL;DR: The key mechanisms to control blood pressure and cerebral blood flow are not reduced in 2 stages of Alzheimer disease compared with controls, both in rest and during orthostatic changes that reflect daily life challenges.
Journal ArticleDOI
Impaired cerebral blood flow regulation in chronic traumatic brain injury
Kan Ding,Takashi Tarumi,Tsubasa Tomoto,Max Mccolloster,Tran Le,Marisara Dieppa,Ramon Diaz-Arrastia,Kathleen R. Bell,Christopher J. Madden,C. Munro Cullum,Rong Zhang +10 more
TL;DR: Findings suggested that subjects with chronic TBI showed impaired dCA which may contribute to persistent cognitive impairment, and Cerebrovascular measures may provide a physiological measure to evaluate interventions for Chronic TBI and accompanying functional deficits.
Dissertation
Regulation of cerebral perfusion in Alzheimer’s disease: From seconds to months
TL;DR: Loss of signal in BP and loss in CBFV, affects interpretation of Transfer function analysis outcomes, and it is vital to validate signal quality to the defined standards before interpreting TFA outcomes.
Journal ArticleDOI
Effect of orthostasis on the regulation of skin blood flow in upper and lower extremities in human.
TL;DR: The research is aimed to investigate interactions between cardiovascular signals and to assess contributions of central and local mechanisms to skin blood flow regulation in upper and lower extremities at rest and under orthostasis.
References
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Journal ArticleDOI
Intraclass correlations: uses in assessing rater reliability.
TL;DR: In this article, the authors present guidelines for choosing among six different forms of the intraclass correlation for reliability studies in which n target are rated by k judges, and the confidence intervals for each of the forms are reviewed.
Journal ArticleDOI
Quantifying test-retest reliability using the intraclass correlation coefficient and the SEM.
TL;DR: In this review, the basics of classic reliability theory are addressed in the context of choosing and interpreting an ICC and how the SEM and its variants can be used to construct confidence intervals for individual scores and to determine the minimal difference needed to be exhibited for one to be confident that a true change in performance of an individual has occurred.
Journal ArticleDOI
Oscillation and Chaos in Physiological Control Systems
Michael C. Mackey,Leon Glass +1 more
TL;DR: First-order nonlinear differential-delay equations describing physiological control systems displaying a broad diversity of dynamical behavior including limit cycle oscillations, with a variety of wave forms, and apparently aperiodic or "chaotic" solutions are studied.
Journal ArticleDOI
Statistical Methods For Assessing Measurement Error (Reliability) in Variables Relevant to Sports Medicine
Greg Atkinson,Alan M. Nevill +1 more
TL;DR: It is recommended that sports clinicians and researchers should cite and interpret a number of statistical methods for assessing reliability and encourage the inclusion of the LOA method, especially the exploration of heteroscedasticity that is inherent in this analysis.
Book
Feedback Systems: An Introduction for Scientists and Engineers
TL;DR: Feedback Systems develops transfer functions through the exponential response of a system, and is accessible across a range of disciplines that utilize feedback in physical, biological, information, and economic systems.