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Research article summary:
Dynamic changes in the cerebral metabolic rate of O2 and oxygen extraction ratio in event-related functional MRI.
Abstract Extract:
Dynamic changes in the cerebral metabolic rate of oxygen (CMRO(2)) and oxygen extraction ratio (OER) in an event-related functional MRI (ER-fMRI) were measured in this study. Six subjects participated in this study at a magnetic field of 1.9 T. Cerebral ... (Full abstract text below) Published 2003Feb
in Journal: Neuroimage
(Language : eng)
Full Pubmed Extract
This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:
1. Neuroimage.
2003 Feb;18(2):257-62
Dynamic changes in the cerebral metabolic rate of O2 and oxygen extraction ratio in event-related functional MRI.
Feng CM, Liu HL, Fox PT, Gao JH
Research Imaging Center, University of Texas Health Science Center, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA.
Dynamic changes in the cerebral metabolic rate of oxygen (CMRO(2)) and oxygen extraction ratio (OER) in an event-related functional MRI (ER-fMRI) were measured in this study. Six subjects participated in this study at a magnetic field of 1.9 T. Cerebral blood flow (CBF) and blood oxygenation level-dependent (BOLD) changes were acquired during the brief visual stimulation, and the corresponding changes in CMRO(2) and OER were then determined. The results showed that the maximum relative changes in CMRO(2) and OER were about 10.36 +/- 0.85 and -6.54 +/- 0.55%, respectively, while the maximum changes in CBF and BOLD were approximately 17.35 +/- 1.37 and 1.03 +/- 0.06%, respectively. The CBF, CMRO(2), and OER changes reach their maximum approximately 1 s earlier than the BOLD signal change (4.15 +/- 0.21, 4.16 +/- 0.21, and 4.17 +/- 0.21 s vs 5.12 +/- 0.24 s after stimulation, P < 0.05).
PMID : 12595180 [PubMed - Indexed for MEDLINE]
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Full Author Information
| First Name | LastName | Initials |
| Ching-Mei | Feng | CM |
| Ho-Ling | Liu | HL |
| Peter T | Fox | PT |
| Jia-Hong | Gao | JH |
Affiliation: Research Imaging Center, University of Texas Health Science Center, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA.
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MESH categories and related page links
This article was linked to the MESH categories shown on the left below. The links on the right are related Memletics pages.
Category links from this article:- Arousal - physiology
- Brain - blood supply
- Energy Metabolism - physiology
- Evoked Potentials - physiology
- Evoked Potentials, Visual - physiology
- Humans
- Image Processing, Computer-Assisted
- Magnetic Resonance Imaging - methods
- Mathematical Computing
- Oxygen Consumption - physiology
- Pattern Recognition, Visual - physiology
- Regional Blood Flow - physiology
- Visual Cortex - blood supply
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