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neurons

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a worm superimposed with lines and nodes representing neural networks
neural networks

Researchers Discover a More Flexible Approach to Machine Learning

By Steve Nadis
February 7, 2023
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“Liquid” neural nets, based on a worm’s nervous system, can transform their underlying algorithms on the fly, giving them unprecedented speed and adaptability.

Quantized Columns

When Does the Brain Operate at Peak Performance?

By John M. Beggs
January 31, 2023
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The critical brain hypothesis suggests that neural networks do their best work when connections are not too weak or too strong.

A sad woman stands under an umbrella that is decorated with images of brains, molecules and DNA. Rain falls on her under the umbrella but the day is otherwise clear.
neuroscience

The Cause of Depression Is Probably Not What You Think

By Joanna Thompson
January 26, 2023
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Depression has often been blamed on low levels of serotonin in the brain. That answer is insufficient, but alternatives are coming into view and changing our understanding of the disease.

2022 in Review

The Year in Biology

By John Rennie
December 21, 2022
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Momentum for new ideas in Alzheimer’s research joined advances in neuroscience, developmental biology and origin-of-life studies to make 2022 a memorable year of biological insights.

neuroscience

What Causes Alzheimer’s? Scientists Are Rethinking the Answer.

By Yasemin Saplakoglu
December 8, 2022
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After decades in the shadow of the reigning model for Alzheimer’s disease, alternative explanations are finally getting the attention they deserve.

Illustration of electrified brain embedded within a computer chip.
artificial intelligence

New Chip Expands the Possibilities for AI

By Allison Whitten
November 10, 2022
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An energy-efficient chip called NeuRRAM fixes an old design flaw to run large-scale AI algorithms on smaller devices, reaching the same accuracy as wasteful digital computers.

Green cross section of a brain with a large bright area in its left hemisphere.
neuroscience

Lab-Grown Human Cells Form Working Circuits in Rat Brains

By Allison Whitten
October 12, 2022
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Letting human brain organoids grow in animal brains could be an ethical new option for experimental studies of neurological disorders.

A human figure in a brain landscape stands at a fork in a road. One way goes to pleasant surroundings, the other to an unpleasant place.
memory

A Good Memory or a Bad One? One Brain Molecule Decides.

By Yasemin Saplakoglu
September 7, 2022
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When the brain encodes memories as positive or negative, one molecule determines which way they will go.

Orange netlike structures surround the neurons in our brains.
Quantized Columns

Neuronal Scaffolding Plays Unexpected Role in Pain

By R. Douglas Fields
July 28, 2022
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Perineuronal nets, rigid structures that hold certain neurons in place, affect a surprising amount of brain activity, including some associated with chronic pain.


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