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

Beasts of Science is like a collection of stories. Beautiful stories that tell the living in all its freshness. But also in all its complexity. A bracket to marvel at the treasures of the world. For this new installment, let’s revisit what has become our best friend: the dog.

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When it sniffs the poop, it’s a little annoying. We have to admit it. But when you have a cold. Different drugs and their effects
Some drugs are euphoric, others hallucinogenic; some may decrease alertness or cause…” data-image=”https://cdn.futura-sciences.com/buildsv6/images/midioriginal/b/8/0/b808f0a115_89618_shutterstock-anton-jankovoy.jpg ” 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 long been known that the dog has an olfactory function
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”>Odor exceptionally.

On closer inspection, this is not very surprising. That mucous membrane hiding in it dog truffle has a surface area 50 times larger than our nose and airways
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 space, a star tracker is an optoelectronic device used to point 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 Odor. For comparison, our nose counts no more than 5 million!

adrenal function
The brain is located in the cranial box and is the seat of higher (cognitive functions, senses, nerve reactions) 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”>Brain, same conclusion. The dog’s olfactory bulb – understand the region of the brain that processes messages sent by smell sensors – is up to 30 times larger than that of humans. With about 40 times more cells for odor analysis.

And all without mentioning the surprising organ that the vets call the vomeronasal organ. It is placed in the dog’s upper palate. Connected to the nose by two small canals. Thanks to him, the dog can analyze smells with incredible finesse. Even if the so-called simple 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

The extraordinary power of the dog already seems to have no more secrets for scientists. But that would mean forgetting her boundless curiosity. Because despite everything, they remained amazed by a dog whoseOdor seems a million times more efficient than ours. So they used an advanced neuroimaging technique to try to pinpoint the pathways that the white substance in the dog’s brain. The white matter is the one that carries information between brain areas. Millions of cables surrounded by organic matter, nitrogenous matter, etc.
There are different families like:

organic matter representing living beings (animal or plant) 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 that myelin.

Twenty dogs took part in the experiment. Dogs are all pretty good sniffers, let’s face it. And what the researchers have observed, first of all, are connections between the olfactory bulb – which is behind the olfactory bulb Eyes of the dog – and the limbic system and the piriform lobe. This is where the brain processes memories and emotions. Connections like at home. The same compounds that plunge us back into our childhood with the simple smell of hot chocolate. No wonder so far. However, the researchers also discovered connections that they had not expected at all. Because such connections have not been observed in any other animal species. Not even in humans. Links to spinal cord function
The spinal cord forms the extension of the brain to the cranial cavity, starting from the rachidian tuber and doing so along the entire vertebral column in which it is contained. Its job is to…” 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 through the brain. Some scientists assumed so. But this time it’s proven. This also explains why dogs that have become blind are able to orientate themselves so well in their surroundings. Much better than us. Good news for people who share the life of a dog. And one more sign that our best friend is not so stupid!

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