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Archive for the ‘neuroscience’ category: Page 387

Sep 8, 2022

Structural brain alterations associated with suicidal thoughts and behaviors in young people: results from 21 international studies from the ENIGMA Suicidal Thoughts and Behaviours consortium

Posted by in categories: biotech/medical, neuroscience

Suicide is the second leading cause of death for young people aged between 15 and 29 [1]. Suicidal thoughts and behaviors (STBs) typically emerge during adolescence [2]. It has been estimated that between 11 and 29% of adolescents report suicidal ideation (suicidal thoughts), and 2–10% of adolescents attempted suicide in the past year [3]. Unfortunately, the number of suicide attempts among children and adolescents has continued to increase sharply despite national and international prevention efforts [4].

To improve targeting of prevention and intervention efforts and thereby reduce the number of deaths by suicide in this age group, we must increase our understanding of the mechanisms underlying both suicidal thoughts and suicidal behaviors (including suicide attempts) in young people. Neuroimaging, including Magnetic Resonance Imaging (MRI), is a useful tool with which to identify biological risk markers for STBs in vivo and non-invasively. Many neuroimaging studies have been published examining the neural substrates of STBs in the past 20 years, but few have focused on STBs in youth (for a review, see [5]). Although several of these studies support lower regional brain volumes, particularly in ventral and dorsal prefrontal and also in temporal regions [6,7,8,9] in suicide attempters with mood disorders, negative findings have also been reported [10, 11].

Sep 8, 2022

How does nature nurture the brain?

Posted by in category: neuroscience

After a 60-minute walk in nature, activity in brain regions involved in stress processing decreases. This is the finding of a recent study by the Lise Meitner Group for Environmental Neuroscience at the Max Planck Institute for Human Development, published in Molecular Psychiatry.

Living in a city is a well-known risk factor for developing a , while living close to nature is largely beneficial for mental health and the brain. A central brain region involved in stress processing, the amygdala, has been shown to be less activated during stress in people who live in , compared to those who live in cities, hinting at the potential benefits of nature. “But so far the hen-and-egg problem could not be disentangled, namely whether nature actually caused the effects in the brain or whether the particular individuals chose to live in rural or urban regions,” says Sonja Sudimac, predoctoral fellow in the Lise Meitner Group for Environmental Neuroscience and lead author of the study.

To achieve causal evidence, the researchers from the Lise Meitner Group for Environmental Neuroscience examined in regions involved in stress processing in 63 healthy volunteers before and after a one-hour walk in Grunewald forest or a shopping street with traffic in Berlin using functional magnetic resonance imaging (fMRI). The results of the study revealed that activity in the amygdala decreased after the walk in nature, suggesting that nature elicits beneficial effects on related to stress.

Sep 8, 2022

New study identifies how memory of personal interactions declines with age

Posted by in categories: biotech/medical, life extension, neuroscience

One of the most upsetting aspects of age-related memory decline is not being able to remember the face that accompanies the name of a person you just talked with hours earlier. While researchers don’t understand why this dysfunction occurs, a new study conducted at University of Maryland School of Medicine (UMSOM) has provided some important new clues. The study was published on September 8 in Aging Cell.

Using aging , researchers have identified a new mechanism in neurons that causes memories associated with these social interactions to decline with age. In addition, they were able to reverse this in the lab.

The researchers report that their findings identified a specific target in the brain that may one day be used to develop therapies that could prevent or reverse loss due to typical aging. Aging memory problems are distinct from those caused by diseases like Alzheimer’s or dementia. At this time, there are no medications that can prevent or reverse cognitive decline due to typical aging.

Sep 8, 2022

Elon Musk’s NEURALINK vs Bryan Johnson’s KERNEL (No Surgery)

Posted by in categories: biotech/medical, Elon Musk, life extension, neuroscience, robotics/AI, wearables

00:00 Intro.
02:44 Kernel Flow brain interface.
08:03 Seeing my brain activity.
12:42 Reversing aging-Project Blueprint.
18:18 Overcoming depression.
26:42 Starting Kernel.
34:40 Why non-invasive?
36:43 Comparison to Tesla/ Neuralink.
43:52 Elon considered joining Kernel?
44:52 Kernel hiring.
46:17 Participate in the studies.

Participate & experience Kernel Flow: https://www.kernel.com/participate.
Information: Kernel Flow: https://www.kernel.com/flow.
Kernel Careers: https://jobs.lever.co/kernel-2
Neura Pod Episode about Kernel & Bryan Johnson: https://youtu.be/c0VFiEhDg6I
Bryan Johnson LinkedIn: https://www.linkedin.com/in/bryanrjohnson/
Bryan Johnson Personal Page: https://www.bryanjohnson.co/
Blueprint Website: https://blueprint.bryanjohnson.co/

Continue reading “Elon Musk’s NEURALINK vs Bryan Johnson’s KERNEL (No Surgery)” »

Sep 8, 2022

New Device Can Detect Alzheimer’s 17 Years in Advance

Posted by in categories: biotech/medical, neuroscience

Before the first clinical symptoms appear, Alzheimer’s.

Alzheimer’s disease is a disease that attacks the brain, causing a decline in mental ability that worsens over time. It is the most common form of dementia and accounts for 60 to 80 percent of dementia cases. There is no current cure for Alzheimer’s disease, but there are medications that can help ease the symptoms.

Sep 8, 2022

‘Jumping’ genes yield new clues to origins of neurodegenerative disease

Posted by in categories: biotech/medical, neuroscience

The findings also point to possible directions for treatment of the disease.

The results are published Sept. 6 in the journal Neuron.

Almost half the human genome is comprised of transposable elements, long and short stretches of DNA called “jumping genes” for their ability to move from one location of the genome to others. Once called “junk” DNA, these transposable sequences have been shown to play crucial regulatory roles in many biological functions. Once they fulfill these myriad roles, molecular regulators usually silence their expression.

Sep 8, 2022

A memory prosthesis could restore memory in people with damaged brains

Posted by in categories: cyborgs, neuroscience

It works by copying what happens in the hippocampus—a seahorse-shaped region deep in the brain that plays a crucial role in memory. The brain structure not only helps us form short-term memories but also appears to direct memories to other regions for long-term storage.

For more than 10 years, Theodore Berger and Dong Song at the University of Southern California and their colleagues have been developing a way to mimic this process. Their idea is to use brain electrodes to understand the electrical patterns of activity that occur when memories are encoded, and then use those same electrodes to fire similar patterns of activity.

Sep 8, 2022

Martin Ciupa — AI Superintelligence, The Singularity & Neuralink

Posted by in categories: Elon Musk, existential risks, neuroscience, Ray Kurzweil, robotics/AI, singularity

https://www.timventura.com — Martin Ciupa discusses the existential risks and unintended consequences of AI superintelligence and the Singularity, along with concerns about AI augmentation through Neuralink. We also explore the philosophical underpinnings of The Singularity and how it fulfills a long-standing human need for transcendence in a technologically advanced society.

Martin Ciupa is a subject matter expert on artificial intelligence. Martin is the CEO of Remoscope Inc, an AI-based Telehealth startup, and an advisor & consultant to Mindmaze, a Unicorn Neurotech company focuses on applying advanced neuroscience to everyday life. Martin has decades of experience in computing and artificial intelligence, PhD studies in AI, and a Master’s Degree in Cybernetics. He joins us today to discuss AI Superintelligence and the Singularity.

Continue reading “Martin Ciupa — AI Superintelligence, The Singularity & Neuralink” »

Sep 8, 2022

David Pearce and Andrés Gómez Emilsson Chat About the Nature of Reality

Posted by in categories: biotech/medical, neuroscience, robotics/AI, transhumanism

Along the way, they discuss the early days of David’s HedWeb, the Abolitionist Project, the Three Supers of Transhumanism (Superhappiness, Superintelligence, and Superlongevity), philosophy and history of science, the nature of intelligence, field theories of consciousness, anesthesia, empathogens, anti-tolerance drugs, and much more.

Some of the key essays discussed:

Continue reading “David Pearce and Andrés Gómez Emilsson Chat About the Nature of Reality” »

Sep 8, 2022

How a single protein could unlock age-related vision loss

Posted by in categories: biotech/medical, life extension, neuroscience

Research led by Sanford Burnham Prebys professor Francesca Marassi, Ph.D., is helping to reveal the molecular secrets of macular degeneration, which causes almost 90% of all age-related vision loss.

The study, published recently in the Biophysical Journal, describes the flexible structure of a key blood protein involved in macular degeneration and other age-related diseases, such as Alzheimer’s and atherosclerosis.

“Proteins in the blood are under constant and changing pressure because of the different ways blood flows throughout the body,” says Marassi. “For example, blood flows more slowly through small blood vessels in the eyes compared to larger arteries around the heart. Blood proteins need to be able to respond to these changes, and this study gives us fundamental truths about how they adapt to their environment, which is critical to targeting those proteins for future treatments.”