Results 41 to 50 of about 23,457 (242)

Transcranial doppler ultrasonography in neurocysticercosis

Arquivos de Neuro-Psiquiatria
Hinpetch Daungsupawong, Viroj Wiwanitkit
doaj   +4 more sources

All Is Relative—A Call for Considering “Physiologically Informed” Control Conditions to Improve the Mechanistic Understanding of the Effects of Physical Exercise on Cognition

Scandinavian Journal of Psychology, EarlyView.
ABSTRACT There is a growing interest in elucidating the mechanisms that drive the benefits of physical exercise on cognitive performance. A key element for a better understanding of a particular phenomenon (e.g., the mediators of the exercise‐cognition interaction) is the selection of an appropriate control condition/group as the basis for causal ...
Fabian Herold, Benjamin Tari, Sylwester Kujach, Olivier Dupuy, C. Shawn Green, Thomas Gronwald, Matthew Heath   +6 more
wiley   +1 more source

Análise da capacidade reactiva da circulação intracerebral pelo efeito do CO2. Um método de fácil execução.

Acta Médica Portuguesa, 1998
Maintenance of cerebral perfusion pressure is a prerequisite for the prevention of cerebral ischaemia. Physiological fluctuations in systemic perfusion pressure are compensated by cerebrovascular autoregulation.
A Baptista, J Ribeiro
doaj   +1 more source

Confined spaces in space: Cerebral implications of chronic elevations of inspired carbon dioxide and implications for long‐duration space travel

Experimental Physiology, EarlyView.
Abstract Cerebrovascular regulation is critically dependent upon the arterial partial pressure of carbon dioxide (PaCO2${P_{{\mathrm{aC}}{{\mathrm{O}}_{\mathrm{2}}}}}$), owing to its effect on cerebral blood flow, tissue PCO2${P_{{\mathrm{C}}{{\mathrm{O}}_{\mathrm{2}}}}}$, tissue proton concentration, cerebral metabolism and cognitive and neuronal ...
Jay M. J. R. Carr, Philip N. Ainslie, Trevor Day   +2 more
wiley   +1 more source

Transcranial doppler sonography and the application in critical care and anesthesia

, 2021
This thesis discusses the application of Transcranial Doppler Sonography in the fields of critical care and anesthesiology. It highlights the mechanism of cerebrovascular hemostasis.
Larinde, Samson
core  

Effects of the angle of head‐down tilt on dynamic cerebral autoregulation during combined exposure to cephalad fluid shift and mild hypercapnia

Experimental Physiology, EarlyView.
Abstract Astronauts experience combined exposure to a cephalad fluid shift and mild hypercapnia during space missions, potentially contributing to health problems. Such combined exposure may weaken dynamic cerebral autoregulation. The magnitude of cephalad fluid shift varies between individuals, and dynamic cerebral autoregulation may be affected more ...
Tomokazu Kato, Yojiro Ogawa, Ken‐ichi Iwasaki   +2 more
wiley   +1 more source

Mechanisms of Cough Syncope as Evaluated by the Valsalva Maneuver

Kaohsiung Journal of Medical Sciences, 2007
Transcranial Doppler is often employed for the assessment of cerebral hemodynamics. The study by Chao et al in the February 2007 issue of the journal raises some important issues regarding the understanding of the mechanisms involved in cough syncope. We
Vijay K. Sharma, Bernard P.L. Chan
doaj   +1 more source

Regional changes in cerebral blood flow between the upright and supine posture and over 3 days of bed rest

Experimental Physiology, EarlyView.
Abstract A reduction in cerebral blood flow (CBF) has been observed during spaceflight and bed rest. We aimed to examine the magnitude and regional heterogeneity of the decrease in CBF during bed rest compared to posture changes on Earth. Seventeen participants (age, 29 ± 9 years, 7 females) were studied in the upright and supine posture and over 3 ...
Carmen Possnig, Kyohei Marume, Gautam Babu, Sylvan L. J. E. Janssen, Christopher M. Hearon Jr, Katrin A. Dias, Satyam Sarma, Justin S. Lawley, Benjamin D. Levine   +8 more
wiley   +1 more source

Transcranial Doppler-guided deairing of a pediatric ventricular assist device: experience with twins

, 2015
We report the intraoperative courses of 2 consecutive Berlin Heart Excor® Pediatric Ventricular Assist Device implantations, in which transcranial Doppler ultrasonography helped to detect macroscopically undetected residual air bubbles captured in the ...
Eberle, Balthasar, Erdös, Gabor, Hutter, Damian Marco, Kadner, Alexander   +3 more
core   +1 more source

Measuring resting cerebral haemodynamics using MRI arterial spin labelling and transcranial Doppler ultrasound: comparison in younger and older adults

, 2021
Introduction: Resting cerebral blood flow (CBF) and perfusion measures have been used to determine brain health. Studies showing variation in resting CBF with age and fitness level using different imaging approaches have produced mixed findings.
Mullinger, Karen J., Lucas, Samuel J E, Susan T. Francis, Claire V. Burley, Francis, Susan T, Mullinger, Karen; id_orcid, Whittaker, Anna; id_orcid, Anna C. Whittaker, Francis, Susan T., Samuel J.E. Lucas, Burley, Claire, Francis, Susan, Karen J. Mullinger, Burley, Claire V, Lucas, Samuel J.E., Mullinger, Karen J, Burley, Claire V., Whittaker, Anna C, Lucas, Sam; id_orcid, Whittaker, Anna C.   +19 more
core   +2 more sources