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ScienceDaily: Mind & Brain News |
| Farmers spread Transeurasian languages Posted: 29 Nov 2021 09:27 AM PST New research provides interdisciplinary support for the 'Farming Hypothesis' of language dispersal, tracing Transeurasian languages back to the first farmers moving across Northeast Asia beginning in the Early Neolithic -- roughly between 8-10 thousand years ago. |
| How can our brain still perceive familiar objects even when they become indistinct? Posted: 26 Nov 2021 10:44 PM PST Researchers have explored the brain neuronal mechanism that allows the perception of familiar images even if they are indistinct. They found that the number of neurons responding to low-contrast rather than high-contrast visual stimuli increased in rats performing a visual orientation discrimination task after repeated experiences. These neurons showed stronger activities in correct-choice than incorrect-choice trials. These neurons efficiently represented low-contrast stimulations. Thus, the low-contrast preference in V1 activity may contribute to improved low-contrast visual. discrimination. |
| Optoelectrode changes reduce injuries to brain tissue, improve nerve research Posted: 23 Nov 2021 10:13 AM PST Researchers have developed a technique for assembling optoelectrodes that looks to offer the best of silicon-based electrodes and polymer-based electrodes. The scientists demonstrated it is possible to efficiently create a semiflexible light-emitting electrode by removing the stiff silicon material from underneath the tip of the probe. The resulting device can study deep brain tissues with high resolution to record signals from individual nerve cells and stimulate small groups of neurons with state-of-the-art techniques such as optical waveguides. |
| Poor sleep linked to feeling older and worse outlook on aging, which can impact health Posted: 22 Nov 2021 10:55 AM PST Poor sleep in the over 50s is linked to more negative perceptions of aging, which in turn can impact physical, mental and cognitive health, new research has revealed. A study found that people who rated their sleep the worst also felt older, and perceived their own physical and mental aging more negatively. |
| Ranked lists skew decision-makers' choices toward top option Posted: 22 Nov 2021 10:54 AM PST In an age of online restaurant reviews and product ratings, landing in first place on a 'top 10' list can confer great benefits on the top-ranked option, magnifying the differences between it and all other choices and blinding people to important details that might otherwise affect their decision-making, according to new research. |
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