%0 Journal Article
%T Effect of preceding exercise on cerebral and splanchnic vascular responses to mental task
%A Nami Someya
%A Tsukasa Ikemura
%A Naoyuki Hayashi
%J Journal of Physiological Anthropology
%D 2012
%I BioMed Central
%R 10.1186/1880-6805-31-17
%X In the exercise trial, 11 males exercised for 30£żmin on a cycle ergometer with a workload set at 70% of the age-predicted maximal heart rate for each individual. After a 15-min recovery period, the subjects rested for 5£żmin for pre-task baseline measurement and then performed mental arithmetic for 5£żmin followed by 5£żmin of post-task measurement. In the resting trial, they rested for 45£żmin and pre-task baseline data was obtained for 5£żmin. Then mental arithmetic was performed for 5£żmin followed by post-task measurement. We measured the mean blood velocity in the middle cerebral artery and superior mesenteric artery and the mean arterial pressure.Mean arterial pressure and mean blood velocity in the middle cerebral artery were significantly higher than the baseline during mental arithmetic in both exercise and resting trials. Mean blood velocity in the middle cerebral artery during mental arithmetic was greater in the control trial than the exercise trial. Mean blood velocity in the superior mesenteric artery showed no significant change during mental arithmetic from baseline in both trials.These results suggest that acute exercise can moderate the increase in cerebral blood flow induced by a mental task.
%K Mental stress
%K Acute exercise
%K Superior mesenteric artery
%K Middle cerebral artery
%U http://www.jphysiolanthropol.com/content/31/1/17/abstract