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A multimodal neuroimaging study of cerebrovascular regulation: Protocols and insights of combining electroencephalography, functional near-infrared spectroscopy, transcranial Doppler ultrasound, and physiological parameters.
J Neural Eng
January 2025
University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, CANADA.
The current paper describes the creation of a simultaneous trimodal neuroimaging protocol. The authors detail their methodological design for a subsequent large-scale study, demonstrate the ability to obtain the expected physiologically induced responses across cerebrovascular domains, and describe the pitfalls experienced when developing this approach. Approach: Electroencephalography (EEG), functional near-infrared spectroscopy (fNIRS), and transcranial Doppler ultrasound (TCD) were combined to provide an assessment of neuronal activity, microvascular oxygenation, and upstream artery velocity, respectively.
View Article and Find Full Text PDFRelationship between the amplitudes of cerebral blood flow velocity and intracranial pressure using linear and non-linear approach.
J Clin Monit Comput
December 2024
Department of Biomedical Engineering, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wroclaw, Poland.
Intracranial pressure (ICP), cerebral blood flow and volume are affected by craniospinal elasticity and cerebrospinal fluid dynamics, interacting in complex, nonlinear ways. Traumatic brain injury (TBI) may significantly alter this relationship. This retrospective study investigated the relationship between the vascular and parenchymal intracranial compartments by analysing two amplitudes: cerebral blood flow velocity (AmpCBFV) and ICP (AMP) during hypocapnia manoeuvre in TBI patients.
View Article and Find Full Text PDFOrthostatic intolerance with tachycardia (postural tachycardia syndrome) and without (hypocapnic cerebral hypoperfusion) represent a spectrum of the same disorder.
Front Neurol
October 2024
Department of Neurology, Brigham and Women's Hospital, Boston, MA, United States.
Background: Spectrum of chronic orthostatic intolerance without orthostatic hypotension includes postural tachycardia syndrome (POTS), with orthostatic tachycardia and hypocapnic cerebral hypoperfusion (HYCH), without orthostatic tachycardia. This study compared autonomic, cerebrovascular, and neuropathic features of POTS and HYCH.
Methods: This retrospective study evaluated patients with orthostatic intolerance referred for autonomic testing.
Hypocapnia in women with fibromyalgia.
Scand J Pain
January 2024
Department of Public Health and Caring Sciences, Section of Family Medicine, Uppsala University, Box 564, SE-751 22, Uppsala, Sweden.
Objectives: The purpose of this study was to investigate whether people with fibromyalgia (FM) have dysfunctional breathing by examining acid-base balance and comparing it with healthy controls.
Methods: Thirty-six women diagnosed with FM and 36 healthy controls matched for age and gender participated in this cross-sectional study. To evaluate acid-base balance, arterial blood was sampled from the radial artery.
Mild hypocapnia and outcomes in mechanically ventilated acute brain-injured patients: another piece in the puzzle.
Intensive Care Med
May 2024
Department of Surgery, University of Valencia, Valencia, Spain.
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