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Friday, March 29, 2024
Electrodes reveal a look of memories emerging in a brain

Electrodes reveal a look of memories emerging in a brain

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Seconds before a memory pops up, certain nerve cells jolt into collective action. The discovery of this signal, described in the Aug. 16 Science, sheds light on the mysterious brain processes that store and recall information. Electrodes implanted in the brains of epilepsy patients picked up neural signals in the hippocampus, a key memory center,…
Both fish and human beings have REM-like sleep

Both fish and human beings have REM-like sleep

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No one should have to sleep with the fishes, but new research on zebrafish suggests that we sleep like them. Sleeping zebrafish have brain activity similar to both deep slow-wave sleep and rapid eye movement, or REM, sleep that’s found in mammals, researchers report July 10 in Nature. And the team may have tracked down…
Alzheimer’s targets brain cells that assist individuals remain awake

Alzheimer’s targets brain cells that assist individuals remain awake

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Alzheimer’s disease destroys command centers in the brain that keep people awake. That finding could explain why the disease often brings daytime drowsiness. Sleep problems can precede dementias, including Alzheimer’s, sometimes by decades. But the new result, described online August 12 in Alzheimer’s & Dementia, suggests that disordered sleeping isn’t just an early harbinger of…
How your brain resembles a movie editor

How your brain resembles a movie editor

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The brain’s hippocampi may be the film editors of our lives, slicing our continuous experiences into discrete cuts that can be stored away as memories. That’s the idea raised by a new study that analyzed brain scan data from people watching films such as “Forrest Gump.” “Research like this helps us identify ‘What is an…
How singing mice belt out duets

How singing mice belt out duets

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In the understory of Central American cloud forests, musical mice trill songs to one another. Now a study of the charismatic creatures reveals how their brains orchestrate these rapid-fire duets. The results, published in the March 1 Science, show that the brains of singing mice split up the musical work. One brain system directs the…
Brain scans translate an evasive signature of awareness

Brain scans translate an evasive signature of awareness

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A conscious brain hums with elaborate, interwoven signals, a study finds. Scientists uncovered that new signature of consciousness by analyzing brain activity of healthy people and of people who were not aware of their surroundings. The result, published online February 6 in Science Advances, makes headway on a tough problem: how to accurately measure awareness…
Tinkering fruit flies’ gut germs turns them into speed walkers

Tinkering fruit flies’ gut germs turns them into speed walkers

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Researchers have found a new link between gut and brain. By signaling to nerve cells in the brain, certain microbes in the gut slow a fruit fly’s walking pace, scientists report. Fruit flies missing those microbes — and that signal — turn into hyperactive speed walkers. With the normal suite of gut microbes, Drosophila melanogaster…
Individuals who have a common sense of odor are likewise excellent navigators

Individuals who have a common sense of odor are likewise excellent...

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We may truly be led by our noses. A sense of smell and a sense of navigation are linked in our brains, scientists propose. Neuroscientist Louisa Dahmani and colleagues asked 57 young people to navigate through a virtual town on a computer screen before being tested on how well they could get from one spot…
Female rats deal with sex predisposition too

Female rats deal with sex predisposition too

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When researchers release a new finding about the brain, it’s often mice or rats who have run the mazes and taken the tests for science. People might wonder: Are rodents good substitutes for humans? Maybe for men, but what about women? That’s less likely, because most neuroscience experiments don’t use female rodents — a fact…
Promoting the spine assists 3 more paralyzed individuals stroll

Promoting the spine assists 3 more paralyzed individuals stroll

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Paralysis is becoming less permanent — at least for some. There’s now more evidence that stimulating the spinal cord can restore voluntary movement in paralyzed patients who haven’t recovered after other treatments. After five months of training coupled with targeted stimulation of nerve cells in the spinal cord, three people who had a severe spinal…

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