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Resistance Exercise Linked to Lower Depression and Anxiety in Korean Adults

A 2026 nationwide Korean analysis found that resistance exercise was associated with lower depression and anxiety scores after propensity score matching, while aerobic exercise alone was not significantly associated with either outcome. The result favors adding weights, bands, machines, or body-weight strength work to mental-health exercise advice without assuming that lifting caused the lower symptom …

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Anxious Depression fMRI Meta-Analysis Finds Left Temporal Activation

Editorial brain-map card for anxious depression with highlighted limbic and prefrontal regions from an earlier draft framing.

A 2026 fMRI meta-analysis of 11 studies found a narrow anxious-depression signal: 829 anxious-depression patients differed from 681 non-anxious MDD patients in left middle temporal gyrus activation (SDM-Z = 2.046, p = 0.020), while healthy-control contrasts centered on the anterior commissure and right middle frontal gyrus. The calibrated interpretation is not “amygdala and insula hyperactivity …

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Astrocyte Calcium Signals Shape Amygdala Fear Memory and Extinction in Mice

Photoreal illustration of astrocytes interacting with neurons in the amygdala, conveying glial role in fear circuit dynamics.

A 2026 Nature mouse study found that basolateral amygdala astrocyte Ca2+ signals tracked fear retrieval and extinction, then showed causality: 3 mg/kg CNO manipulations of astrocyte DREADDs pushed early-extinction freezing in opposite directions while both disrupting later extinction retrieval.1 Research Highlights Astrocytes tracked fear state: after 3 tone-shock pairings and 2 days of 25 cue-only …

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Teen Anxiety and Anhedonia Split Reward-Uncertainty fMRI

Photoreal illustration of adolescent brain regions with overlapping reward and default-mode network glow, conveying uncertainty processing.

A 2026 fMRI study of 84 medication-free adolescents found that reward uncertainty had its own phase-specific brain pattern: anxiety, depression, and anhedonia separated across different task phases and brain systems.1 The clearest clinical split was narrow but useful: anxiety tracked blunted striatum/thalamus activation during uncertain non-reward expectancy, while depression and anhedonia tracked higher visual/default-network activation …

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fMRI Biotypes Predicted tDCS Anxiety Response in Older Adults

Photoreal illustration of a clinician fitting a tDCS device on an older adult, with brain network biotype overlays.

A 2026 BETA analysis of 199 older adults found that resting-state fMRI could separate 4 anxiety-related tDCS response patterns, but the result was narrower than “brain scan predicts treatment”: only the Robust tDCS Responder subtype showed a statistically reliable Active vs. Sham anxiety advantage across all participants.1 Research Highlights Only 1 subtype cleared the Active …

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Iceland Psychiatric Data: 21% Diagnosed, 34% on Psychotropics (2026)

MHD featured image for Iceland Psychiatric Health: 21% Diagnosed, 34% on Psychotropics.

Iceland is a registry-rich country with a small enough population that genuinely nationwide health data is feasible — not the survey-based approximations that anchor most psychiatric epidemiology elsewhere. A 2026 PLOS One study used the Iceland Screens, Treats, or Prevents Multiple Myeloma (iStopMM) cohort — 80,759 adults aged 40+, representing 54% of all eligible Icelanders …

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