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J Occup Health year 2000 volume 42 number 2 page 60 - 65
Classification Original
Title Change in Blood Volume in the Brain during a Simulated Aircraft Landing Task
Author Yoshinori TAKEUCHI
Organization Department of Public Health, Kyorin University School of Medicine
Keywords Brain blood volume, Hemoglobin, Near Infra-red Spectroscopy (NIRS), Mental Stress, Pilot
Correspondence Y. Takeuchi, Aeromedical Laboratory, 1-2-10 Sakae, Tachikawa, Tokyo 190-8585, Japan
Abstract Change in Blood Volume in the Brain during a Simulated Aircraft Landing Task: Yoshinori TAKEUCHI. Department of Public Health, Kyorin University School of Medicine-The change in brain blood volume during a stressful task was measured by using Near Infra-Red Spectroscopy (NIRS) which monitors concentration changes in oxygenated hemoglobin (HbO2) and deoxygenated hemoglobin (Hb) levels in the brain. To operate a flight simulator is a complex task and well-reflected real world, which is different from the task in a laboratory. Nine pilots landed a flight simulator in a crosswind of which the velocity was varied as four conditions from the light to strong. HbO2 obtained from left forehead was increased as a function of wind velocity. Few or no changes were seen in HbO2 from right forehead or Hb from both the left and right forehead. The results of this study showed that the brain blood volume was affected by mental stress which depended on the difficulty of the task. An assessment of mental stress may be able to monitor an increase in HbO2 in the left forehead by NIRS in the field.