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News
Confidence shapes how the brain explains success and failure
1+ week, 1+ day ago (1184+ words) Confidence builds a sense of control, and two brain circuits turn that estimate into how much you learn from a win or a loss. When a job application disappears into silence, you have to decide whether the resume was weak…...
Tiny sounds can make fluid waves larger in the sleeping brain
2+ day, 9+ hour ago (1003+ words) Carefully timed sounds can make fluid waves larger in the sleeping brain, giving researchers a new way to study how brain activity and CSF flow are connected. Sleep is often treated as a time when the brain simply shuts down....
Researchers map the full brain wiring that dictates how animals process taste and decide what to eat
3+ day, 4+ hour ago (1442+ words) A fruit fly can taste food all over its body. New research shows how those signals travel through the brain to control eating. A fruit fly lands on something sweet and its mouthparts unfold toward it. The obvious way to…...
Scientists identify brain cells that control how badly the body needs sleep
4+ day, 16+ hour ago (1126+ words) Two groups of brainstem cells build sleep drive in mice, and damping them cut sleep by nearly 70% without the usual damage. Push through a long enough day and the urge to sleep stops being a choice. That pressure builds the…...
This electric fish show how brains separate useful signals from noise
1+ week, 3+ day ago (1228+ words) To find buried prey, the elephantnose fish senses tiny electric fields while firing its own pulses. A brain map shows how neurons filter them out. In muddy African rivers, an elephantnose fish hunts with sensors in its skin that pick…...
Half the brain’s synapses disappeared, but the memories survived
1+ week, 6+ day ago (1017+ words) Artificial hibernation caused mice to lose more than half of their hippocampal synapses, yet their memories survived, challenging ideas about long-term memory. A memory from years ago is still there when you go looking for it. Many of the connections…...
Tiny microscope can watch and control brain cells in moving animals
2+ week, 2+ day ago (1114+ words) A tiny head-mounted microscope lets researchers watch and activate individual brain cells while mice move freely. Watching individual brain cells fire in fine detail inside a living animal has often meant holding the animal’s head in place. But a mouse…...
An octopus’s arms contain more neurons than its central brain, and scientists have learned how they are organized
3+ week, 1+ day ago (1047+ words) Octopus arms have an axial nerve cord built in repeating segments, the first case of nervous system segmentation documented in any mollusk. An octopus feeling its way into a rock crevice is not waiting on orders from its brain. Most…...
Vivid dreams may drain the brain’s energy during sleep
3+ week, 3+ day ago (955+ words) During REM sleep, blood flow increases while energy inside neurons drops, revealing a surprising paradox linked to vivid dreams. Some mornings you wake from a vivid dream more tired than when you fell asleep. Sleep is supposed to leave you…...