title: Correlation between cognitive ability measured by response time of 1-back task and changes of SpO2 by supplying three different levels of oxygen in the elderly.
abstract: OBJECTIVE
  This study investigated the correlation between response time of the 1-back task and changes of blood oxygen saturation (SpO2 ) by supplying three different levels of oxygen (21%, 1 L/min; 93%, 1 L/min; 93%, 5 L/min) in the elderly.
  
  
  METHODS
  A total of 17 older adults (mean age 72.9 ± 4.7 years) participated in the experiment. A 1-back task was used as a cognitive task. The experiment consisted of three phases, which included the adaptation phase (3 min) after oxygen administration, the control phase (2 min) that maintained a stable condition before the task, and the task phase (2 min) where the 1-back task was carried out. SpO2 was measured during each phase.
  
  
  RESULTS
  As concentration level and supply of oxygen increased, SpO2 increased and response time of the 1-back task decreased.
  
  
  CONCLUSIONS
  Highly concentrated oxygen administration can increase SpO2 in the elderly and an increase in cognitive performance, such as a decrease in response time, can be observed.
authors: Department of Biomedical Engineering, Research Institute of Biomedical Engineering, College of Biomedical & Health Science, Konkuk University, Chungju, Chungbuk 380-701, South Korea.
authors: Mi-Hyun
authors: MH
authors: Choi
authors: Hyun-Joo
authors: HJ
authors: Kim
authors: Ji-Hye
authors: JH
authors: Kim
authors: Hyung-Sik
authors: HS
authors: Kim
authors: Jin-Seung
authors: JS
authors: Choi
authors: Jeong-Han
authors: JH
authors: Yi
authors: Gye-Rae
authors: GR
authors: Tack
authors: Young-Sun
authors: YS
authors: Chung
authors: Ina
authors: I
authors: Son
authors: Soon-Cheol
authors: SC
authors: Chung
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D000368:Aged; D003071:Cognition / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology; D010092:Oximetry / Q000295:instrumentation; D010100:Oxygen / Q000008:administration & dosage / Q000097:blood*; D010102:Oxygen Inhalation Therapy / Q000379:methods*; D011930:Reaction Time / Q000502:physiology*
chemical_list: D010100:Oxygen