Document Detail


Cerebral oxygenation in the frontal lobe cortex during incremental exercise tests: the regional changes influenced by volitional exhaustion.
MedLine Citation:
PMID:  20204801     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present study examined the regional differences of cortical oxygenation in the frontal lobe by near-infrared spectroscopy (NIRS) during incremental exercise tests and the precise location of NIRS was examined by brain magnetic resonance imaging (MRI). Pulmonary gas exchange and NIRS measurement during incremental cycling ergometry tests were investigated in 14 men. In 7 of these subjects, the right middle cerebral artery mean velocity (MCA Vmean) was simultaneously measured by transcranial Doppler (TCD). In the right medial of the frontal lobe cortex, Tissue Oxygenation Index (TOI) increased by 8.8% with its peak value at respiratory compensation threshold (RCT) and Normalized Tissue Hemoglobin Index (nTHI) increased until endpoint by 16.2%. During incremental exercise tests, the changing pattern of TOI was different according to the distribution of the probes. Volitional exhaustion by exercise induced the deteriorated TOI and MCA Vmean, whereas nTHI increased.
Authors:
Mikio Hiura; Tetsuya Mizuno; Tsukasa Fujimoto
Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Advances in experimental medicine and biology     Volume:  662     ISSN:  0065-2598     ISO Abbreviation:  Adv. Exp. Med. Biol.     Publication Date:  2010  
Date Detail:
Created Date:  2010-03-05     Completed Date:  2010-03-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0121103     Medline TA:  Adv Exp Med Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  257-63     Citation Subset:  IM    
Affiliation:
Hosei University, Tokyo, Japan. phmikmd@hosei.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Anaerobiosis
Cerebral Arteries / physiology
Exercise Test*
Fatigue / physiopathology*
Frontal Lobe / blood supply,  physiology*
Humans
Magnetic Resonance Imaging
Male
Oxygen / metabolism*
Respiration
Spectroscopy, Near-Infrared
Volition / physiology*
Young Adult
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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