Le chien. Il partage notre quotidien depuis des millénaires maintenant. Mais il ne nous a pas encore révélé tous ses secrets. Celui, par exemple, qui fait de lui un renifleur exceptionnel. Il se cacherait au fond de son cerveau. Faisant la preuve une fois de plus que le chien n’est pas si bête. © Karoline Thalhofer, Adobe Stock

A Unique Connection in the Dog Brain

“Beasts of Science” is like a collection of short stories. Beautiful stories told by the living in all their freshness. But also in all its complexity. A parenthesis to marvel at the world’s treasures. For this new episode, once again, let’s go back to what has become our best friend: the dog.

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When you smell the droppings, it’s a bit annoying. We have to admit it. But when it comes to inhaling different drugs and their effects
Some drugs are euphoric, others hallucinogenic; some may reduce vigilance or cause…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/b/8/0/b808f0a115_89618_shutterstock-anton-jankovoy.jpg ” data- url=”https://news.google.com/health/definitions/medicine-drug-15687/” data-more=”Read more”>drugs, bombs, victims of disasters or even diseases, it is immediately much more interesting. And it has been known for a long time, the dog has a function of smell
The sense of smell relies on chemoreceptors in the nose that detect volatile chemicals in the air. In some…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/b/1/6/b162e724ee_71939_odorat.jpg” data-url=”https://news. google.com/sante/definitions/human-body-smell-14735/” data-more=”Read more”>smell exceptional.

When you look closer, it’s not very surprising. the mucous membrane who hides in it dog truffle it has 50 times more surface area than that found in our nose and respiratory system
In humans, the nose is the only part of the respiratory system…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/a/e/7/ae7b9928e8_71945_nose.jpg ” data-url=”https://news.google.com/health/definitions/human-body-nose-14731/” data-more=”Read More”>nose. It consists of 200 million to 1 billion In the space field, a star tracker is an optoelectronic device used to orient satellites.” data-image=”https://cdn.futura-sciences.com/buildsv6/ images/ midioriginal/6 /3/4/6349c4ee96_50036247_capteurrecopesca-image-node-full.jpg” data-url=”https://news.google.com/tech/definitions/technologie-senseur-8460/” data-more= “Read the definition” >sensors smell. In comparison, ours, always on the nose, does not count more than 5 million!

lateral brain function
Located in the braincase, the brain is the seat of higher functions (cognitive functions, senses, nerve responses) and vegetative functions. It is therefore an essential organ that regulates everything…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/5/c/b/5cb474dd85_121782_cerveau-3d .jpg” data- url=”https://news.google.com/health/definitions/biology-brain-3125/” data-more=”Read more”>brainsame conclusion. The dog’s olfactory bulb, that is, the region of the brain that processes the messages sent by scent sensors, is up to 30 times larger than that of humans. With approximately 40 times more cells dedicated to odor analysis.

And all that without mentioning the amazing organ that the veterinarians called the vomeronasal organ. It is placed on the upper palate of the dog. Connected to the nose by two small canals. Thanks to it, the dog can analyze odors with incredible delicacy. Even when the so-called single covalent bond…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/d/0/e/d0e3dc7e1e_76472_molecule.jpg” data-url= ” https ://news.google.com/sciences/definitions/chemistry-molecule-783/” data-more=”Read more”>molecules fragrant are not legion.

Smell and sight are connected to each other

The extraordinary power of the dog might already seem to hold no more secrets to scientists. But that would be forgetting his boundless curiosity. Because despite everything, they were baffled by a dog whosesmell It seems a million times more efficient than ours. So they used an advanced neuroimaging technique to try to locate the paths taken by the white matter in the dog’s brain. White matter is what transports information between areas of the brain. Millions of cables surrounded by 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://news.google.com/sciences/definitions/matiere-matiere-15841/” data-more=”Read more”>matter fat, the myelin.

Twenty dogs participated in the experiment. All dogs are very good sniffers, let’s face it. And what the researchers have observed are, firstly, connections between the olfactory bulb, which is located behind the eyes of the dog – and the limbic system and the piriform lobe. This is where the brain processes memory and emotions. Connections similar to those found at home. Those same connections that immerse us in our childhood with the simple smell of hot chocolate. Not surprising, until now. But the researchers also discovered connections they didn’t expect at all. Because such connections have never been observed in any other animal species. Not even in humans. Links to Spinal Cord Function
The spinal cord constitutes the extension of the brain from the cranial box, starting from the medulla oblongata and this along the vertebral column in which it is contained. Its function is…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/7/9/f/79f489d9e1_71125_moelleepiniere.jpg” data-url=”https:// news .google.com/sante/definitions/biology-spinal-marrow-2330/” data-more=”Read more”>spinal cord and with the occipital lobe.

The occipital lobe is the region of the brain that processes… visual information! Yes, you read it right. In dogs, smell and sight are connected by the brain. Some scientists guessed so. But this time, it’s proven. This also explains how dogs that have gone blind manage to orient themselves so well in their surroundings. Much better than us. Good news for humans who share the life of a dog. And one more sign that our best friend not so stupid!

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