All articles tagged with #memory
A systematic review of 27 rodent studies finds that switching from unhealthy high-fat, high-sugar diets to healthier foods can improve hippocampus-dependent memory, but recovery is incomplete and sugar may limit full restoration compared with never-exposed controls.
A new study shows the hippocampal CA3 memory circuit begins with an excess, randomly connected network after birth and prunes itself into a sparse, structured network by adulthood. This pruning shortens some axons while dendrites grow more receptor sites, shifting memory signaling from single strong connections to distributed, multi-neighbor integration. Computer simulations suggest the sparse network enhances memory storage and retrieval. While informative about brain maturation and infantile amnesia, the work was done in mice on brain slices, and the exact biological triggers remain to be identified.
Acute stress impairs the brain’s ability to link memories from separate days, reducing inference skills; brain imaging points to disruption in hippocampal memory integration after a mock job interview.
Former Army general Mark Hertling reflects on Memorial Day as more than a long weekend, describing the laminated memorial cards he keeps listing fallen comrades, the true meaning of sacrifice, and the imperative for Americans to honor the fallen not with empty rhetoric but by living with integrity, serving their communities, and making the sacrifices of others matter in daily life.
A six-year observational study of over 1,200 older Australians found that higher salt intake was associated with a decline in episodic memory among men (not women). While not proving causation, researchers note that sodium-related vascular and inflammatory changes, including higher blood pressure and reduced brain blood flow, could contribute to memory aging. The study reinforces guidance to limit sodium (WHO recommends under 2000 mg/day) as part of a brain-healthy lifestyle, especially for older men.
People returning to childhood games aren’t just seeking fun; psychology suggests they’re trying to reclaim a version of themselves displaced by time. Nostalgia blends restorative and reflective longing, while episodic memory and the reminiscence bump make adolescence-era memories unusually vivid. Adults’ flow state is harder to achieve due to responsibilities and evolved cognitive patterns, so the recalled experience often feels brighter and more cohesive than the real game. In short, retro gaming serves as a reconstructive retrieval cue for identity, not a simple replay.
Researchers document representational drift: over days to weeks, individual neurons change how they respond to stimuli, even as behavior remains stable; this challenges the idea of fixed neuronal roles and suggests that memory and perception may rely on population dynamics rather than single-cell codes. Drift rates vary by brain region and may help timestamp memories or integrate new information, with implications for memory disorders and brain–computer interfaces. The exact function is still debated and likely involves multiple mechanisms, including synaptic turnover and plasticity.
Stocks fell as memory and semiconductor names led a tech-driven slide, with information technology the day’s worst sector and five of the Magnificent 7 dropping; Seagate’s capacity warnings pulled memory peers lower while energy outperformed. Hedge fund activity around AI infrastructure names sparked big moves in Lumentum and Coherent after exits; T1 Energy surged on a disclosed 3.6% stake, LiveRamp jumped on a $2.17 billion all‑cash buyout by Publicis, and Berkshire Hathaway rotated out of UnitedHealth while adding Macy’s and Delta. Bitcoin and Ethereum wobbled as ETFs faced outflows, underscoring caution amid AI spending and supply dynamics.
A mouse-model study shows dopamine levels in the entorhinal cortex drop to under 20% in Alzheimer's, crippling associative memory encoding. Restoring dopamine signaling—either by optogenetic stimulation or with Levodopa (L-DOPA)—rejuvenates neural activity and fully reverses cognitive deficits, suggesting a new therapeutic avenue that targets memory circuitry beyond traditional amyloid/tau approaches.
BuzzFeed Health compiles 31 viral facts about the human body, offering quick explanations and sources—from how memories and songs are stored in different brain regions to astonishing quirks like enteral ventilation (butt breathing) and fetal stem cell migration—delivering a playful, educational tour of our body's surprises.
Scientists are making strides in memory editing, from animal studies that erase fear memories by targeting brain cells to noninvasive human approaches (CBT, EMDR, and a Tetris-based trick) that lessen flashbacks. Although these methods show promise, permanent memory erasure remains unproven and ethically fraught, with experts arguing for modulation over deletion to avoid impacts on identity, justice, and personal growth.
An investor known as Millennial Dividends sees Micron (MU) riding an AI-driven memory demand boom into 2027, with strong near‑term upside but a potential peak by 2028 as capacity expands. MU is sold out through 2027 and supply‑constrained, yet its forward P/E (~12.9x) remains below long‑run averages, suggesting more upside, though price targets imply downside from the rally. The article notes a Strong Buy stance from the investor alongside a bullish Street consensus that could understate risk of overcapacity.
Micron Technology is benefiting from surging AI-related memory demand, guiding for about $33.5 billion in quarterly revenue with an ~81% gross margin as demand outpaces supply. Top investor Keithen Drury is bullish, noting Micron has only two-thirds of demand covered by current capacity and that data-center memory demand could grow from $35 billion in 2025 to $100 billion by 2028, suggesting the shortage may persist for years. The stock enjoys a strong buy consensus on Wall Street, though 12-month targets still trail the current price.
Micron Technology has surged about 154% year-to-date on AI-driven memory demand, but analysts are divided on how much further MU can rise. Bulls like D.A. Davidson’s Gil Luria with a Buy and a $1,000 target and Bank of America’s Vivek Arya with a $950 target point to strong mid-term demand and pricing support, while Bernstein’s Mark Li ($510) and TD Cowen’s Krish Sankar ($660) warn of downside risk after a powerful rally. Overall, the street shows a Strong Buy with an average target around $608 (about 16% below current levels), suggesting the upside is increasingly priced in as investors weigh AI-driven memory demand against potential margin headwinds.
Scientists developed a tool to temporarily boost mitochondrial activity in the brain, and in mouse models of neurodegenerative disease this restored memory performance, suggesting energy failure in neurons may drive cognitive decline and could become a new therapeutic target—though the approach is still far from human use and requires extensive safety and efficacy studies.