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Russian neuroscientists have discovered a new type of «brain waves»

A scientist from Kazan Federal University, together with colleagues from Finland and Great Britain, has discovered spontaneous wave-like changes in the oxygen level in the blood of rats under anesthesia. The intensity of the changes, it turned out, depends on the activity of various types of adrenaline receptors, and they occur because of the activity of neuroglia (auxiliary cells of nervous tissue), and not because of the electrical signals neurons carry. A scientific article is published in the Journal of Cerebral Blood Flow & Metabolism.
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The researchers used fMRI to study the brains of rats under anesthesia induced by medetomidine. The results showed that wave-like oscillations of blood oxygen saturation occur spontaneously under the effect of medetomidine in the area of the cortex of the large hemispheres, thalamuses, and hippocampi of a male rat’s brain. The researchers argue that the waves are the result of interaction of the blood vessels in the brain and the cells of the neuroglia. Researchers believe that the «waves» of the level of oxygen saturation of the blood can reveal certain features of the work of brain-feeding vessels.

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