A novel method of combining blood oxygenation and blood flow sensitive magnetic resonance imaging techniques to measure the cerebral blood flow and oxygen metabolism responses to an unknown neural stimulus. [PDF]
, 2013 Simultaneous implementation of magnetic resonance imaging methods for Arterial Spin Labeling (ASL) and Blood Oxygenation Level Dependent (BOLD) imaging makes it possible to quantitatively measure the changes in cerebral blood flow (CBF) and cerebral ...
Buxton, Richard B +3 more
core +3 more sources
Hemodynamic response magnetic resonance imaging: application for renal hemodynamic characterization [PDF]
Nephrology Dialysis Transplantation, 2013 The clinical use of iodinated radiocontrast agents or gadolinium for renal perfusion imaging is limited in the presence of renal dysfunction. We have previously demonstrated the feasibility of hemodynamic response imaging (HRI), a functional magnetic resonance imaging (MRI) method combined with hypercapnia and hypercapnic-hyperoxia, for monitoring ...
Zohar, Milman +7 more
openaire +2 more sources
Functional Brain Imaging of Young, Nondemented, and Demented Older Adults [PDF]
, 2010 Brain imaging based on functional MRI (fMRI) provides a powerful tool for characterizing age-related changes in functional anatomy. However, between-population comparisons confront potential differences in measurement properties.
Buckner, Randy Lee +4 more
core +1 more source
Scandinavian Journal of Work, Environment & Health, 2018 OBJECTIVES: The present study examined hemodynamic responses of normotensive and untreated hypertensive participants under simulated long working hours (LWH) – 13 hours – in an experimental laboratory study.
Hiroki Ikeda +4 more
doaj +1 more source
Task-Specific Stimulation Duration for fNIRS Brain-Computer Interface
IEEE Access, 2020 In this paper, the most effective stimulation durations in the visual, somatosensory, and motor cortices are investigated. To evoke hemodynamic responses (HRs) for the purpose of brain-computer interface (BCI) with functional near-infrared spectroscopy ...
M. N. Afzal Khan +2 more
doaj +1 more source
Comparing the effect of dexmedetomidine with magnesium sulfate on hemodynamic changes in patients undergoing laparoscopic cholecystectomy [PDF]
مجله علوم پزشکی فیض (پیوسته), 2023 Background: Evolution of laparoscopic surgery has been enormous help to both patient and surgeon, although incidence of pneumoperitoneum as consequence of laparoscopic surgery would cause hemodynamic instability.
Mehdi Rajabi +3 more
doaj +2 more sources
Regularized brain reading with shrinkage and smoothing [PDF]
, 2016 Functional neuroimaging measures how the brain responds to complex stimuli. However, sample sizes are modest, noise is substantial, and stimuli are high dimensional. Hence, direct estimates are inherently imprecise and call for regularization. We compare
Ramdas, Aaditya +3 more
core +1 more source
Exercise intolerance and fatigue in chronic heart failure: is there a role for group III/IV afferent feedback? [PDF]
, 2020 Exercise intolerance and early fatiguability are hallmark symptoms of chronic heart failure. While the malfunction of the heart is certainly the leading cause of chronic heart failure, the patho-physiological mechanisms of exercise intolerance in these ...
Angius, Luca, Crisafulli, Antonio
core +2 more sources
Delayed hemodynamic responses in schizophrenia
NeuroImage, 2005 While there are many reports of reduced amplitude of hemodynamic responses in schizophrenia, there are no reports of delayed hemodynamic responses, in spite of event-related brain potential (ERP) evidence of slowed neural responses. Recently, Henson et al. (2002) [Henson, R., Price, C., Rugg, M., Turner, R., Friston, K., 2002.
Judith M, Ford +4 more
openaire +2 more sources
Multiscale adaptive smoothing models for the hemodynamic response function in fMRI [PDF]
, 2013 In the event-related functional magnetic resonance imaging (fMRI) data analysis, there is an extensive interest in accurately and robustly estimating the hemodynamic response function (HRF) and its associated statistics (e.g., the magnitude and duration ...
Fan, Jianqing +4 more
core +4 more sources