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Category: neuroscience – Page 87

The default mode network (DMN) is a set of interconnected brain regions known to be most active when humans are awake but not engaged in physical activities, such as relaxing, resting or daydreaming. This brain network has been found to support a variety of mental functions, including introspection, memories of past experiences and the ability to understand others (i.e., social cognitions).

The DMN includes four main brain regions: the (mPFC), the (PCC), the angular gyrus and the hippocampus. While several studies have explored the function of this network, its anatomical structure and contribution to information processing are not fully understood.

Researchers at McGill University, Forschungszentrum Jülich and other institutes recently carried out a study aimed at better understanding the anatomy of the DMN, specifically examining the organization of neurons in the tissue of its connected brain regions, which is known as cytoarchitecture. Their findings, published in Nature Neuroscience, offer new indications that the DMN has a widespread influence on the human brain and its associated cognitive (i.e., mental) functions.

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Source: Ben-Gurion University of the Negev.

Chronic stress changes the way our brain processes sounds, according to new research conducted on mice at Ben-Gurion University of the Negev. For instance, sounds need to be louder during chronic stress to trigger similar responses.

Chronic stress is known to impact learning and decision-making, but could it also affect how we hear?

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Crossing the blood–brain barrier in primates is a major obstacle to gene delivery in the brain. Here an adeno-associated virus variant (AAV.CAP-Mac) is identified and demonstrated for crossing the blood–brain barrier and delivering gene sequences to the brain of different non-human primates species.

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Can our thoughts, our very essence of being, be explained by the enigmatic laws governing the subatomic world? The Quantum Mind theory proposes just that — a radical idea suggesting that consciousness isn’t just a product of neurons firing, but intricately woven into the fabric of quantum physics. This isn’t the plot of a science fiction novel, but a burgeoning field of study captivating scientists and philosophers alike.

While seemingly disparate, the realms of quantum physics and human consciousness share a curious connection. Quantum mechanics, the study of the universe’s tiniest constituents, reveals a reality vastly different from our everyday experience, a world of probabilities and interconnectedness. Could this be the missing piece in understanding our own inner world, the subjective experience of being conscious?

This essay explores the fascinating intersection of these two fields, examining how the peculiar characteristics of the quantum realm might hold the key to unlocking the secrets of consciousness.

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01:06 How much is a Tesla Cybercab?
11:22 How have the features and upgrades of the Tesla Cybercab been enhanced?
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What do you think of a car that can drive itself from the factory straight to your home? A car that will automatically head to the police station if someone tries to steal it or take you to the hospital if you lose consciousness while driving. Or simply, it allows you to enjoy a deep, restful sleep after work and wake up right at your doorstep.
Recently, Elon Musk and his team confidently announced that this vehicle would be available to consumers at just one-fifth the ticket price of Waymo, an incredible deal for two passengers! And you can rest assured about safety, as it has been verified to be 8.5 times safer than a traditional human-driven car.
In today’s episode, we’ll compile all the latest updates on its performance, impressive specifications, final pricing, and a detailed breakdown of its production process, all packed into this 19 minutes. Welcome to Tesla Car World!
As Tesla said the new Cybercab could cost Tesla only half as much to manufacture as a Model Y. This means ticket prices could be significantly lower compared to Waymo, which charges nearly five times the price of a Robotaxi and incurs much higher operating costs due to extensive mapping requirements. This presents a massive profit opportunity for Tesla while offering an incredibly affordable fare for up to two passengers!
Moreover, for the price of a bus ticket—which isn’t always the most pleasant experience—you get a private space, your own cabin. You can relax, sleep, work, entertain yourself, watch a great movie, and travel in the most comfortable and efficient way possible aboard Tesla’s Cybercab.
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#888999evs #teslacarworld #teslacar #888999 #teslarobotaxi #cybercab #teslacybercab.
subcribe: https://bit.ly/3i7gILj

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A recent study in an animal model provides direct evidence for the role of the vagus nerve in gut microbiome-brain communication, addressing a critical gap in the field.

The research—led by Kelly G. Jameson, as a Ph.D. student in the Hsiao Lab at UCLA—demonstrates a clear causal relationship between and vagal nerve activity. The work is published in the journal iScience.

While the has long been thought to facilitate communication between the gut microbiome—the community of microorganisms living in the intestines—and the brain, direct evidence for this process has been limited. Researchers led by Jameson observed that mice raised without any gut bacteria, known as , exhibited significantly lower activity in their vagus nerve compared to mice with a normal gut microbiome. Notably, when these germ-free mice were introduced to gut bacteria from normal mice, their vagal nerve activity increased to normal levels.

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Using the latest brain preservation techniques, could we ever abolish death? And if so, should we?

Watch the Q&A here (exclusively for our Science Supporters): https://youtu.be/iSIIDJS2a2U
Buy Ariel’s book here: https://geni.us/xvi1Ivf.

This lecture was recorded at the Ri on 2 December 2024.

Just as surgeons once believed pain was good for their patients, some argue today that death brings meaning to life. But given humans rarely live beyond a century – even while certain whales can thrive for over two hundred years – it’s hard not to see our biological limits as profoundly unfair.

Yet, with ever-advancing science, will the ends of our lives always loom so close? For from ventilators to brain implants, modern medicine has been blurring what it means to die. In a lucid synthesis of current neuroscientific thinking, Ariel Zeleznikow-Johnston explains that death is no longer the loss of heartbeat or breath, but of personal identity – that the core of our identities is our minds, and that our minds are encoded in the structure of our brains. On this basis, he explores how recently invented brain preservation techniques may offer us all the chance of preserving our minds to enable our future revival, alongside the ethical implications this technology could create.

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Continue reading “Could science abolish death? — with Ariel Zeleznikow-Johnston” | >