A new study shows how neurochemicals affect fMRI readings
The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
15 hours ago
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The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
15 hours ago
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39
Elon Musk's company called Neuralink, launched in 2016, aims to implant a piece of technology in people's brains that would allow them to control a computer or phone by thought alone. This is otherwise known as a brain-computer ...
16 hours ago
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A new research paper was published in Aging entitled "Genome-wide transcriptome profiling and development of age prediction models in the human brain."
Mar 15, 2024
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A team of neuroscientists at the University of Pennsylvania has, for the first time, observed how social behavior is encoded in the brain when monkeys are doing normal, everyday things rather than sitting in a laboratory ...
For the first time, researchers at the University of Minnesota Twin Cities showed that non-invasive brain stimulation can change a specific brain mechanism that is directly related to human behavior. This is a major step ...
Mar 15, 2024
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The mammalian brain is a web of densely interconnected neurons, yet one of the mysteries in neuroscience is how tools that capture relatively few components of brain activity have allowed scientists to predict behavior in ...
Mar 6, 2024
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The fact that smoking is a risk factor for several diseases, including cancer, stroke, and diabetes, has been known for approximately half a century. However, over the past few decades, scientists have brought to light many ...
Mar 5, 2024
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When listening to music, the human brain appears to be biased toward hearing and producing rhythms composed of simple integer ratios—for example, a series of four beats separated by equal time intervals (forming a 1:1:1 ...
Mar 4, 2024
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A study led by Ryan W. Logan, Ph.D., professor of psychiatry and neurobiology, has found mutations in key brain cells among individuals with chronic opioid use that could shift how we think about treatment strategies for ...
Mar 1, 2024
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With advances in neuroscience and the development of new technologies, new ethical considerations have emerged. This is particularly true for human brain organoids, which are three-dimensional tissues grown from stem cells ...
Feb 28, 2024
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The human brain is the center of the human nervous system and is a highly complex organ. Enclosed in the cranium, it has the same general structure as the brains of other mammals, but is over three times as large as the brain of a mammal with an equivalent body size. Most of the expansion comes from the cerebral cortex, a convoluted layer of neural tissue that covers the surface of the forebrain. Especially expanded are the frontal lobes, which are involved in executive functions such as self-control, planning, reasoning, and abstract thought. The portion of the brain devoted to vision is also greatly enlarged in humans.
Brain evolution, from the earliest shrewlike mammals through primates to hominids, is marked by a steady increase in encephalization, or the ratio of brain to body size. The human brain has been estimated to contain 50–100 billion (1011) neurons[citation needed], of which about 10 billion (1010) are cortical pyramidal cells.[citation needed] These cells pass signals to each other via approximately 100 trillion (1014)[citation needed] synaptic connections.
In spite of the fact that it is protected by the thick bones of the skull, suspended in cerebrospinal fluid, and isolated from the bloodstream by the blood-brain barrier, the delicate nature of the human brain makes it susceptible to many types of damage and disease. The most common forms of physical damage are closed head injuries such as a blow to the head, a stroke, or poisoning by a wide variety of chemicals that can act as neurotoxins. Infection of the brain is rare because of the barriers that protect it, but is very serious when it occurs. More common are genetically based diseases[citation needed], such as Parkinson's disease, multiple sclerosis, and many others. A number of psychiatric conditions, such as schizophrenia and depression, are widely thought to be caused at least partially by brain dysfunctions, although the nature of such brain anomalies is not well understood.
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