Too much salt slows blood flow in the brain

[EN VIDÉO] 3D brain made with 3D MR imaging Using the new 3D MRI software, a 3D animation can be created from an MRI image. The vivid detail of these animated amplified movements can help identify abnormalities, such as those caused by blockages of spinal fluids, including blood and cerebrospinal fluid in the brain.

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When the structures of neurons
Each neuron is made up of:
of a cell body or pericaryon comprising the nucleus, many ramifications of dendritic type (hence … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/4 /8/4/4845b46c32_50034180_neurone-dr.jpg “data-url =” https://www.futura-sciences.com/sante/definitions/biologie-neurone-209/ “data-more =” Read more “>neurones are active in our brain, they need glucose, the fuel for our cells, and oxygen. Both are transported by the blood and to ensure a supply equal to the neurons’ demand, a set of biological mechanisms is put in place and increases the speed of an ADSL line can be 1024 kbps, for example in reception. In reception, this value is … “data-url =” https://www.futura-sciences.com/tech/definitions/internet-debit-1849/ “data-more =” Read more “>debit blood. The phenomenon has been observed in the cerebral cortex, the outermost layer of the brain also called organic matter, nitrogenous matter, etc.
There are different families like:

organic matter, which constitutes living beings (animals or plants) or … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/e/7/0/e70ccaaf4a_91935_matiere. jpg “data-url =” https://www.futura-sciences.com/sciences/definitions/matiere-matiere-15841/ “data-more =” Read more “>matter grey. Researchers at the University of Georgia (United States) are interested in the same phenomenon, but in a deeper structure, the hypothalamus. And what they observed is rather surprising.

In the hypothalamus, salt reduces blood flow

Let’s look into the supraoptic nucleus of the hypothalamus. This brain region harbors neurons whose main activity is the secretion vasopressin, a Peptide, lipid and steroid hormones
Hormones are used to transmit a chemical signal: they exert an action at … “data-image =” https://cdn.futura-sciences.com/buildsv6/images/midioriginal/f/8/b/f8bca49d5d_98004_ths-hormone -menopause.jpg “data-url =” https://www.futura-sciences.com/sante/definitions/medecine-hormone-751/ “data-more =” Read more “>hormone antidiuretic important in the control of blood salt concentration. If the increased blood flow around neurons promotes their activity, then an excess of blood salt should be linked to the increased blood flow to nourish the neurons which activate to eliminate this anomaly.

Scientists have observed the opposite phenomenon. In the supraoptic nucleus of the hypothalamus, too much salt in the blood causes vasodilation and significantly decreases its flow, to such an extent that locally, the cells are deprived of oxygen (hypoxia). « When we eat very salty, the levels of sodium in the body remain high for a long time. We believe that hypoxia is a mechanism that enhances the ability of neurons to respond to a stimulation continuous saline, allowing them to remain active for a long time », Explains Javier E. Stern, neuroscientist and director of this research. These results raise interesting questions about l’hypertension which, in a significant number of cases, is due to a diet too high in salt.