Category: Memory
- Mouse hippocampal circuits separate experience details to support generalization ()
Published October 31, 2026. A mouse study published in Nature Neuroscience on October 27 examines how the hippocampus can distinguish individual experiences while carrying useful knowledge into new situations. Tang, Chang and colleagues analyzed the collective activity of hippocampal neurons during behavior. Although individual cells showed varied and changing responses, groups of cells organized information […]
- Human amygdala neurons predict which new images will be remembered ()
Published October 31, 2026. A human single-neuron study published in Nature Neuroscience on October 27 links activity in the amygdala to whether newly viewed pictures are subsequently remembered. Xiao and colleagues examined two memory-task datasets collected during intracranial monitoring for drug-resistant epilepsy. Neurons selective for particular image categories fired more strongly while participants viewed pictures […]
- Early cortical stroke shows no additional Alzheimer’s-model deficits at tested time point in mice ()
Published October 31, 2026. A study published today in Scientific Reports tested whether an early cortical stroke worsens Alzheimer’s-related changes in a mouse model. Under the conditions examined, researchers did not detect additional pathology or cognitive impairment in the transgenic animals. Permanent middle cerebral artery occlusion was induced at four months of age in wild-type […]
- REM sleep wave changes associated with Alzheimer’s pathology and overnight forgetting ()
Published October 31, 2026. A study published October 30 in Nature Communications links changes in REM sleep brain waves with aging, Alzheimer’s-related pathology and overnight forgetting. Across two independent cohorts, researchers observed a shift from faster sawtooth delta waves toward slower, NREM-like delta waves with age, particularly during phasic REM sleep. The shift was associated […]
- Aging changes memory-associated neuronal ensembles and gene expression in mice ()
Published October 31, 2026. A new study in Nature Communications examines how aging changes the neuronal ensembles involved in memory, often called engrams. Researchers compared contextual fear-memory encoding and recall in young and aged mice. Nuclear tagging and FOS-based activity mapping revealed age-related differences in the activation, distribution and relationships between memory-associated ensembles across brain […]
- Neuronal NLRP3 Linked to Memory and Synaptic Changes After Brain Injury in Mice ()
Published October 25, 2026. A study in Molecular Psychiatry suggests that neuronal NLRP3 can influence memory after traumatic brain injury through a mechanism involving synaptic signaling, beyond its better-known association with inflammation. Si-Wei Tan and colleagues selectively removed Nlrp3 from hippocampal neurons in mice. Four weeks after experimental injury, these animals showed better spatial-memory performance […]
- CD51 marks astrocyte subtypes with distinct roles in neural circuits and stroke repair ()
Published October 23, 2026. A study published October 21 in Nature identifies astrocyte populations with distinct roles in building and reshaping neural circuits in mice. Junsung Woo, Michael R. Williamson and colleagues developed genetic tools to compare astrocytes expressing the surface marker CD51 with those lacking it. The populations differed in cell shape, calcium activity […]
- Sleep-active hippocampal neurons help regulate memory consolidation in mice ()
Published October 22, 2026. A mouse study published online in Neuron on October 19 identifies hippocampal interneurons that help connect sleep state with memory consolidation. Yili Feng and colleagues targeted neurons expressing Chrm2, the gene encoding the M2 acetylcholine receptor. These inhibitory neurons were particularly active during non-REM sleep and quiet wakefulness. Their activity was […]
- Prefrontal Brain Pathway Controls Threat-Memory Specificity in Rats ()
Published October 20, 2026. Researchers at the University of Iowa have identified a brain pathway that helps distinguish a threatening context from a safe one. The study, published in Nature Communications on October 20, examined how aversive memories become generalized in male rats. The team used optogenetics to alter communication from the rostral prelimbic cortex […]
- Suppressing Stem-Cell PLA2G7 Improves Brain Circuit Function in Aging Mice ()
Published October 20, 2026. A study published in Nature Aging on October 14 identifies a way that neural stem cells influence aging brain circuits beyond producing new neurons. Fuling Wu and colleagues investigated PLA2G7, a secreted enzyme involved in lipid metabolism, in the hippocampal dentate gyrus. Deleting Pla2g7 specifically in neural stem cells increased inhibitory […]