All articles tagged with #brain
New imaging studies reveal that fatherhood dramatically reshapes the brain: as men become dads, neural circuits tied to caregiving, emotion processing, reward, and threat detection reorganize to support bonding and responsive parenting, with changes persisting beyond early fatherhood and potentially influencing behavior and mental health.
In this Nature book review, Romain Brette argues that treating the brain as a programmable computer misleads our understanding of cognition. He critiques neuro-computationalism and the idea that the brain merely processes information, proposing instead an embodied, ecological view in which cognition emerges from the body’s interactions with its environment and anticipation guides action. Brains are dynamic, self‑organizing systems shaped by life, not static machinery.
A small study of 25 fathers scanned up to 24 weeks after birth finds rapid, dynamic brain restructuring: initial widespread gray-matter reductions followed by regional swelling, particularly in areas tied to attention, reward, and emotional processing, suggesting a 'parental brain network' tailored for caregiving. Changes resemble some maternal brain shifts but are preliminary, with unclear longevity and potential variation between first and later children.
Neuroplasticity shows the adult brain continually reorganizes itself based on what we practice and attend to, meaning personality is not fixed. By treating anxious patterns as habits rather than identities, the author shifts from a maintenance mindset toward managing a living system in progress, where deliberate attention and repetition can reshape behavior and self-understanding.
A 19-year Swedish cohort of 20,811 adults found that mentally passive sedentary activities (like watching TV) are linked to higher dementia risk, while mentally active sedentary activities (reading, office work) are linked to lower risk; replacing passive time with active sedentary time reduces risk; results suggest not all sitting is equally harmful and that keeping the brain engaged during sedentary periods may help protect cognition, though causality cannot be established and trials are needed.
A review published in Science argues that sleep drives a brain-cleaning process via the glymphatic system that clears waste such as amyloid-beta and tau. This flow is coordinated by shifts in neuromodulators and heart-rate variability, potentially detectable with smartwatches, and could signal brain health risks. The work reinforces sleep as essential for preventing dementia, though more human studies are needed to confirm how sleep disruption contributes to disease and to explore future therapies.
A seven-day water-only fast drives broad molecular shifts that become most evident after about three days, including changes in hundreds of circulating proteins linked to the extracellular matrix and brain support, alongside a switch from glucose to fat and about 5.7 kg of weight loss. Refeeding largely reverses lean-tissue loss while fat loss persists. These findings could inform therapies that mimic fasting’s benefits for metabolism, aging, and neurological health, though prolonged fasting carries risks and should be medically supervised.
Yale scientists used full-head EEG to monitor patients under propofol anesthesia and found the brain can enter states that resemble both sleep and coma, challenging the idea that anesthesia is simply deep sleep. The findings could guide better, individualized anesthesia care to minimize postoperative cognitive effects and push toward a sleep-like brain state during procedures.
A seven-Tesla fMRI study shows that time perception is not a single clock but a three-stage cortical process: early visual areas encode physical durations, parietal and premotor regions map durations across a topographic layout, and frontal regions translate this into a subjective boundary, revealing a distributed, hierarchical network for how the brain experiences the passage of time.
A Yale-led study using full-head EEG recordings shows anesthesia does not simply put the brain to sleep; instead, anesthetized brains can exhibit sleep-like and coma-like patterns in different regions, challenging the sleep-vs-coma dichotomy and highlighting the potential for real-time brain monitoring to tailor anesthesia and reduce post-surgical cognitive effects.
A new line of chronic-pain research points to a brain region, the caudal granular insular cortex, and the vagus nerve as key players in whether pain fades after an injury or becomes long-lasting; blocking the pathway early in animals prevents chronic pain, while later intervention can ease established pain. The work emphasizes that pain is not just tissue damage but an active nervous-system state influenced by brain circuits, inflammation, and interoceptive signaling, with taVNS emerging as a potential tool in specific clinical contexts—but findings are preliminary and condition-specific.
Creatine dosing is being reconsidered: while 5 g/day remains a reliable baseline for muscle gains, higher doses may offer brain and bone benefits in certain populations, though the evidence is limited and not universally applicable. Safety appears acceptable up to about 10 g/day long-term, with some researchers personally using 10 g/day or splitting doses to cover muscle, bone, and cognitive effects. If you tolerate it well, trying 10 g/day (split into two doses) is reasonable; otherwise, 5 g/day remains a solid choice while science continues to evolve.
A BrainHealth study links brain microplastics to everyday ultra-processed foods (UPFs), noting UPFs account for about 60% of Americans’ calories and may carry plastic fragments into the brain; observational data associate higher brain microplastics with dementia and worsened brain health, while UPF consumption correlates with a higher risk of heart attack, stroke, or death (about fourfold for the combined risk). Preliminary work on therapeutic apheresis to remove plastics from plasma exists, but its effectiveness and scalability are unclear.
A UIUC study shows decision-making signals arise in early brain regions such as the primary somatosensory cortex and are shaped by rapid top-down feedback, challenging the traditional bottom-up view and suggesting future AI that uses bidirectional processing could be more efficient and intelligent.
Scientists at Penn State report in Nature Neuroscience that mild abdominal contractions during everyday movement can pressurize vessels linking the abdomen to the spinal cord and brain, nudging the brain within the skull and driving cerebrospinal fluid flow to wash away waste. Using mice, two-photon microscopy, and computer models, the team shows that abdominal pressure acts like a tiny hydraulic pump, with the brain moving and fluid circulating even with small motions. While demonstrated in mice, the study suggests ordinary movement could support brain health by clearing waste, though more research is needed to confirm relevance to humans.