Alterations in cerebral blood flow and cerebrovascular reactivity during 14 days at 5050 m
نویسندگان
چکیده
منابع مشابه
Alterations in cerebral blood flow and cerebrovascular reactivity during 14 days at 5050 m
Brain blood flow increases during the first week of living at high altitude. We do not understand completely what causes the increase or how the factors that regulate brain blood flow are affected by the high-altitude environment. Our results show that the balance of oxygen (O(2)) and carbon dioxide (CO(2)) pressures in arterial blood explains 40% of the change in brain blood flow upon arrival ...
متن کاملMRI measures of cerebral blood flow and cerebrovascular reactivity in the developing swine brain
J. D. Winter, S. Dorner, J. A. Fisher, K. St. Lawrence, and A. Kassner Physiology and Experimental Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada, Respiratory Therapy, University Health Network, Toronto, Ontario, Canada, Anaesthesiology, University Health Network, Toronto, Ontario, Canada, Physiology, University of Toronto, Toronto, Ontario, Canada, Imaging Division, Lawson ...
متن کاملCaffeine's effects on cerebrovascular reactivity and coupling between cerebral blood flow and oxygen metabolism
The blood-oxygenation-level-dependent (BOLD) signal is dependent on multiple physiological factors such as cerebral blood flow (CBF), local oxygen metabolism (CMRO(2)) and cerebral blood volume (CBV). Since caffeine affects both CBF and neural activity, its effects on BOLD remain controversial. The calibrated BOLD approach is an excellent tool to study caffeine because it combines CBF and BOLD ...
متن کاملCerebral blood flow in diabetes mellitus: evidence of abnormal cerebrovascular reactivity.
Cerebral blood flow (CBF) was studied at normocapnia and after a challenge with 5% CO2 in 59 diabetic patients and 28 controls. There was a significant age-related decline in CBF in both groups, which suggests that diabetes does not affect the rate of decrease of CBF with age. After CO2 challenge CBF increased in most of the controls; in the patients CBF increased in 23, decreased in 26, and re...
متن کاملAlterations in cerebral autoregulation and cerebral blood flow velocity during acute hypoxia: rest and exercise.
We examined the relationship between changes in cardiorespiratory and cerebrovascular function in 14 healthy volunteers with and without hypoxia [arterial O(2) saturation (Sa(O(2))) approximately 80%] at rest and during 60-70% maximal oxygen uptake steady-state cycling exercise. During all procedures, ventilation, end-tidal gases, heart rate (HR), arterial blood pressure (BP; Finometer) cardiac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2011
ISSN: 0022-3751
DOI: 10.1113/jphysiol.2010.192534