Prior studies have demonstrated decreasing cerebral blood flow (CBF) in normal aging, but
the full spatial pattern and potential mechanism of changes in CBF remain to be elucidated. …

The effect of carbon dioxide (CO 2 ) on cerebral metabolism is of tremendous interest to
functional imaging. In particular, mild-to-moderate hypercapnia is routinely used in calibrated …

To understand and predict the blood‐oxygenation level‐dependent (BOLD) fMRI signal, an
accurate knowledge of the relationship between cerebral blood flow (ΔCBF) and volume (…

It is widely assumed in fMRI that the relationship between cerebral blood flow (CBF) and
volume (CBV) changes observed during end-tidal CO 2 (PETCO 2 ) perturbations is equivalent …

The blood oxygenation level dependent (BOLD) signal measures brain function indirectly
through physiological processes and hence is susceptible to global physiological changes. …

Introduction The long-term impact of COVID-19 on brain function remains poorly understood,
despite growing concern surrounding post-acute COVID-19 syndrome (PACS). The goal of …

The resting-state fMRI (rs-fMRI) signal is affected by a variety of low-frequency physiological
phenomena, including variations in cardiac-rate (CRV), respiratory-volume (RVT), and end-…

This paper develops a preliminary study to explore the determinants of capital structure of
Chinese-listed companies using firm-level panel data. The findings reflect the transitional …

A wide range of disorders are thought to arise from dysfunction in brain circuitry (Bonelli and
Cummings, 2007). These pathological circuits are not directly appreciated on routinely …

The purpose of this study was to examine the hypothesis that functional appliances enhance
mandibular growth in the treatment of skeletal Class II malocclusions. We systematically …