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BRAIN WORK AND BRAIN IMAGING

BRAIN WORK AND BRAIN IMAGING Abstract Functional brain imaging with positron emission tomography and magnetic resonance imaging has been used extensively to map regional changes in brain activity. The signal used by both techniques is based on changes in local circulation and metabolism (brain work). Our understanding of the cell biology of these changes has progressed greatly in the past decade. New insights have emerged on the role of astrocytes in signal transduction as has an appreciation of the unique contribution of aerobic glycolysis to brain energy metabolism. Likewise our understanding of the neurophysiologic processes responsible for imaging signals has progressed from an assumption that spiking activity (output) of neurons is most relevant to one focused on their input. Finally, neuroimaging, with its unique metabolic perspective, has alerted us to the ongoing and costly intrinsic activity within brain systems that most likely represents the largest fraction of the brain's functional activity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Neuroscience Annual Reviews

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References (161)

Publisher
Annual Reviews
Copyright
Copyright © 2006 by Annual Reviews. All rights reserved
ISSN
0147-006X
eISSN
1545-4126
DOI
10.1146/annurev.neuro.29.051605.112819
pmid
16776593
Publisher site
See Article on Publisher Site

Abstract

Abstract Functional brain imaging with positron emission tomography and magnetic resonance imaging has been used extensively to map regional changes in brain activity. The signal used by both techniques is based on changes in local circulation and metabolism (brain work). Our understanding of the cell biology of these changes has progressed greatly in the past decade. New insights have emerged on the role of astrocytes in signal transduction as has an appreciation of the unique contribution of aerobic glycolysis to brain energy metabolism. Likewise our understanding of the neurophysiologic processes responsible for imaging signals has progressed from an assumption that spiking activity (output) of neurons is most relevant to one focused on their input. Finally, neuroimaging, with its unique metabolic perspective, has alerted us to the ongoing and costly intrinsic activity within brain systems that most likely represents the largest fraction of the brain's functional activity.

Journal

Annual Review of NeuroscienceAnnual Reviews

Published: Jul 21, 2006

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