scholarly journals Influence of a Discrimination Task during Movement on Cerebral Blood Flow Measured by fNIRS

2008 ◽  
Vol 23 (2) ◽  
pp. 261-265 ◽  
Author(s):  
Minoru YAMADA ◽  
Shu MORIOKA ◽  
Shuheii SUGIMURA
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Discrimination Task

Regional cerebral blood flow in male schizophrenic patients performing an auditory discrimination task

2000 ◽  
Vol 42 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Masato Higashima ◽  
Yasuhiro Kawasaki ◽  
Katsumi Urata ◽  
Naoto Sakai ◽  
Tatsuya Nagasawa ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Regional Cerebral Blood Flow ◽  
Discrimination Task ◽  
Auditory Discrimination ◽  
Regional Cerebral Blood ◽  
Schizophrenic Patients

Alterations in regional decreased cerebral blood flow in patients with irritable bowel syndrome-A PET imaging study

2001 ◽  
Vol 120 (5) ◽  
pp. A637-A637
Author(s):  
Y RINGEL ◽  
D DROSSMAN ◽  
T TURKINGTON ◽  
B BRADSHAW ◽  
R COLEMAN ◽  
...  
Keyword(s):  
Blood Flow ◽  
Irritable Bowel Syndrome ◽  
Cerebral Blood Flow ◽  
Pet Imaging ◽  
Imaging Study ◽  
Irritable Bowel

Patterns of Cerebral Blood Flow and Systemic Hemodynamics During Arithmetic Processing

2008 ◽  
Vol 22 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Natalie Werner ◽  
Neval Kapan ◽  
Gustavo A. Reyes del Paso
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Time Course ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Systemic Hemodynamics ◽  
Heart Period ◽  
Blood Flow Velocities ◽  
Flow Velocities

The present study explored modulations in cerebral blood flow and systemic hemodynamics during the execution of a mental calculation task in 41 healthy subjects. Time course and lateralization of blood flow velocities in the medial cerebral arteries of both hemispheres were assessed using functional transcranial Doppler sonography. Indices of systemic hemodynamics were obtained using continuous blood pressure recordings. Doppler sonography revealed a biphasic left dominant rise in cerebral blood flow velocities during task execution. Systemic blood pressure increased, whereas heart period, heart period variability, and baroreflex sensitivity declined. Blood pressure and heart period proved predictive of the magnitude of the cerebral blood flow response, particularly of its initial component. Various physiological mechanisms may be assumed to be involved in cardiovascular adjustment to cognitive demands. While specific contributions of the sympathetic and parasympathetic systems may account for the observed pattern of systemic hemodynamics, flow metabolism coupling, fast neurogenic vasodilation, and cerebral autoregulation may be involved in mediating cerebral blood flow modulations. Furthermore, during conditions of high cardiovascular reactivity, systemic hemodynamic changes exert a marked influence on cerebral blood perfusion.

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