Dreams transform waking life rather than replaying it directly. In a 2026 Communications Psychology study of 3,366 reports, dreams were more visual, spatial, social, and bizarre than waking reports, while attitude toward dreaming, mind-wandering tendency, sleep quality, and COVID lockdown stress each left measurable fingerprints on dream content.1 Research Highlights Dreams were not random word …
A Nature Communications study found that old vertebrate brains lost almost 40% of cysteine protease deubiquitylase catalytic activity with age, despite relatively stable protein abundance.1 Antioxidant treatment with NACET restored DUB activity in aging brains, making the finding a reversible enzyme-mechanism result rather than a generic “antioxidants reverse brain aging” claim. Research Highlights DUB activity …
Restless legs syndrome (RLS) and opioid-withdrawal restlessness both produce night-worsening urges to move. A 2026 npj Parkinson’s Disease mouse study tied that overlap to hypersensitive striatal D1-mu-opioid receptor signaling in basal-ganglia motor circuits.1 Research Highlights 2 clinically similar states converged: restless legs syndrome and opioid-withdrawal restlessness both point toward a striatal D1-mu-opioid circuit that regulates …
A 2026 functional magnetic resonance imaging study involving 54 adults found that pairing a formerly threatening cue with positive images, a laboratory method called counterconditioning, strengthened later neural safety-memory signals in people with posttraumatic stress disorder. The experiment measured fear-learning biology, not PTSD symptom improvement after therapy.1 Research Highlights 54 adults were analyzed: Cooper et …
A 2026 medRxiv meta-analysis of 27 trials found that transcranial direct current stimulation added to cognitive training improved global cognition immediately after treatment by SMD 0.36 compared with cognitive training alone.1 The signal was small, short-term, and rated very low certainty, so it is not evidence that tDCS is a durable cognitive-rehabilitation shortcut. Research Highlights …
A longitudinal MIDUS analysis involving 840 adults found that loneliness scores higher than a person's objective social-isolation score were linked to later cognitive impairment mainly through chronic disease burden, while the allostatic-load pathway was weaker than the chronic-disease pathway and not statistically confirmed for the main cognitive outcomes.1 Research Highlights Loneliness was separated from isolation: …
A 2026 controlled study of 96 people found severe long-COVID fatigue across 3 validated fatigue scales, but the tested peripheral inflammation, cellular-stress, neuroprotection, and autoimmunity markers did not significantly differ by group or explain fatigue severity.1 The finding argues against a simple blood-marker story, not against the reality of long-COVID fatigue. Research Highlights Fatigue was …