alexa Energetic basis of brain activity: implications for neuroimaging.
Oncology

Oncology

OMICS Journal of Radiology

Author(s): Shulman RG, Rothman DL, Behar KL, Hyder F

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Abstract The complex activities of the brain need not distract us from the certainty that it uses energy and performs work very efficiently. The human brain, which claims approximately 2\% of our body mass, is responsible for approximately 20\% of our body oxygen consumption. In vivo magnetic resonance spectroscopy (MRS) follows the metabolic pathways of energy production (as glucose oxidation) and work (as monitored by the cycling of glutamate and GABA neurotransmitters). In the resting awake state, approximately 80\% of energy used by the brain supports events associated with neuronal firing and cycling of GABA and glutamate neurotransmitters. Small differences in neuronal activity between stimulation and control conditions can be measured and localized using functional magnetic resonance imaging (fMRI). MRS and fMRI experiments show that the majority of cerebral activity, which is often disregarded in imaging experiments, is ongoing even when the brain appears to be doing nothing. This article was published in Trends Neurosci and referenced in OMICS Journal of Radiology

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