A small, deep brain region helps mice hold a thought in mind
Researchers at the University of Geneva studied mice performing tasks that required remembering a sensory cue for a short while before acting on it. They found that neurons in the claustrum, a small and highly connected structure deep in the brain, stayed active while the cue had to be kept in mind, and quieting this region impaired performance across different senses without affecting basic sensation or movement. Because the work was done in mice, it points to a circuit worth studying further rather than a finding already shown in people.
Source: University of Geneva — https://www.unige.ch/medias/en/2026/comment-le-cerveau-garde-une-information-lesprit
Rats learned where danger was by watching another rat
In a study from the Social Brain Lab, researchers recorded single neurons in the hippocampus, a region central to spatial memory, while male rats watched another rat experience a shock in a particular location. The observer rats' place cells responded both to their own location and to the witnessed event, the activity patterns reappeared during later rest, and the observers later behaved more warily in that place. The authors describe this as a basic mechanism for how witnessed experiences can become part of our own spatial memory, not as a tested explanation for any human condition.
Source: MedicalXpress — https://medicalxpress.com/news/2026-10-danger-rat.html
People who walked more over many years scored better on focus and decision tests
Researchers at Baylor College of Medicine analysed Fitbit step records from 2009 to 2023 and a single later round of computerised cognitive tests for 3,093 adults aged 18 to 93 in the NIH All of Us Research Program. Groups averaging roughly 5,100, 8,900 and 14,200 steps a day were compared, and the two more active groups scored higher on sustained attention, filtering distractions and reward-related choices, with each additional 1,000 daily steps linked to small score gains. Blood pressure explained only a small part of the link, and emotion recognition showed no link. As an observational study with one cognitive assessment, it shows an association, not proof that walking by itself improves thinking.
Source: MedicalXpress — https://medicalxpress.com/news/2026-10-daily-period-linked-attention-decision.html