| Reaction time to peripheral visual stimuli during exercise under hypoxia. | |
| | |
MedLine Citation:
|
PMID: 20167674 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The purpose of this study was to test the hypothesis that decrease in cerebral oxygenation compromises an individual's ability to respond to peripheral visual stimuli during exercise. We measured the simple reaction time (RT) to peripheral visual stimuli at rest and during and after cycling at three different workloads [40%, 60%, and 80% peak oxygen uptake (VO2)] under either normoxia [inspired fraction of oxygen (FIO2)=0.21] or normobaric hypoxia (FIO2=0.16). Peripheral visual stimuli were presented at 10 degrees to either the right or the left of the midpoint of the eyes. Cerebral oxygenation was monitored during the RT measurement over the right frontal cortex with near-infrared spectroscopy. We used the premotor component of RT (premotor time) to assess effects of exercise on the central process. The premotor time was significantly longer during exercise at 80% peak VO2 (normoxia: 214.2+/-33.0 ms, hypoxia: 221.5+/-30.1 ms) relative to that at rest (normoxia: 201.0+/-27.2 ms, hypoxia: 202.9+/-29.7 ms) (P<0.01). Under normoxia, cerebral oxygenation gradually increased up to 60% peak VO2 and then decreased to the resting level at 80% peak VO2. Under hypoxia, cerebral oxygenation progressively decreased as exercise workload increased. We found a strong correlation between increase in premotor time and decrease in cerebral oxygenation (r2=0.89, P<0.01), suggesting that increase in premotor time during exercise is associated with decrease in cerebral oxygenation. Accordingly, exercise at high altitude may compromise visual perceptual performance. |
| | |
Authors:
|
Soichi Ando; Yosuke Yamada; Masahiro Kokubu |
Related Documents
:
|
3588054 - Effects of adenosine and xanthine derivatives on breathing during acute hypoxia in the ... 8190754 - Effect of hypoxia and exercise on the distribution of 65zn in rat muscles. 7775304 - Alterations in respiratory control during 8 h of isocapnic and poikilocapnic hypoxia in... 8960704 - Unilateral cooling in the region of locus coeruleus blocks the fall in respiratory outp... 21613554 - Effects of weight loss on serum vitamin d in postmenopausal women. 3588054 - Effects of adenosine and xanthine derivatives on breathing during acute hypoxia in the ... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-18 |
Journal Detail:
|
Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 108 ISSN: 1522-1601 ISO Abbreviation: J. Appl. Physiol. Publication Date: 2010 May |
Date Detail:
|
Created Date: 2010-05-05 Completed Date: 2010-08-12 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: United States |
Other Details:
|
Languages: eng Pagination: 1210-6 Citation Subset: IM |
Affiliation:
|
Osaka University of Health and Sport Sciences, Osaka, Japan. soichi.ando@gmail.com |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Anoxia / metabolism, physiopathology* Bicycling Cerebrovascular Circulation* Electromyography Electrooculography Exercise* Frontal Lobe / blood supply*, metabolism, physiopathology* Humans Male Muscle Contraction Muscle, Skeletal / metabolism Oxygen / blood* Oxygen Consumption Photic Stimulation Psychomotor Performance* Pulmonary Ventilation Reaction Time Spectroscopy, Near-Infrared Time Factors Visual Perception* Young Adult |
| Chemical | |
Reg. No./Substance:
|
7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: High-intensity exercise training in mice with cardiomyocyte-specific disruption of Serca2.
Next Document: Activations of TRPA1 and P2X receptors are important in ROS-mediated stimulation of capsaicin-sensit...