Psychology

Household Pesticide Exposure Was Associated With Depression Risk

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Household Pesticide Exposure Was Associated With Depression Risk

TL;DR: A 2026 cross-sectional NHANES analysis in Depression and Anxiety found that urinary pyrethroid metabolite 3-PBA showed a dose-dependent association with depression, while female participants showed stronger associations for 3-PBA and 4F-3-PBA, while males showed sensitivity to DCBA in mixture models. Key Findings Study type: a survey-weighted analysis using self-reported pesticide exposure and urinary pesticide …

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Home DBS Recordings Tracked Depression Recovery Biomarkers

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Home DBS Recordings Tracked Depression Recovery Biomarkers

TL;DR: A 2026 preprint deep brain stimulation biomarker study in medRxiv found that home-recorded electrophysiology biomarkers tracked stable depression recovery during SCC DBS, while the biomarkers helped distinguish recovery from nonspecific symptom fluctuations and external distress. Key Findings Study type: a home-recording study using bidirectional deep brain stimulation devices to monitor electrophysiology during depression recovery. …

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Hippocampus Encoded Trauma Memory Meaning in PTSD

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Hippocampus Encoded Trauma Memory Meaning in PTSD

TL;DR: A 2026 PTSD neuroimaging and language-analysis study in Neuropsychopharmacology found that hippocampal activity encoded specific semantic content of traumatic and neutral autobiographical memories, while greater hippocampal sensitivity to autobiographical semantic content related to higher PTSD symptom severity. Key Findings Study type: a study combining natural-language semantic quantification with brain activity during traumatic and neutral …

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Hippocampal CA3 Connectivity Transformed From Dense-Random to Sparse-Structured Across Postnatal Development

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Hippocampal CA3 Connectivity Transformed From Dense-Random to Sparse-Structured Across Postnatal Development

TL;DR: A 2026 Nature Communications study found that mouse hippocampal CA3 connectivity shifts from dense-random early wiring to sparse-structured adult wiring, with weaker single synapses that make memory-network output depend on coordinated input rather than one strong connection. Key Findings CA3 connectivity transforms from random to structured during postnatal development: Early in life (P7-8 mice) …

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Gender Friendship Gap Was Driven Mainly by White Men in NLSY97

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Gender Friendship Gap Was Driven Mainly by White Men in NLSY97

TL;DR: A 2026 Sex Roles study using NLSY97 data found that the gender friendship gap in best-friend closeness was driven mainly by white men, while Black men, Latino men, and women across groups reported more similar closeness after controls. Key Findings NLSY97 cohort: The study analyzed 1,765 young adults from the National Longitudinal Survey of …

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New-Onset Loneliness Accelerated Cognitive Decline in 635 Older Adults: ELSA Longitudinal Analysis

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New-Onset Loneliness Accelerated Cognitive Decline in 635 Older Adults: ELSA Longitudinal Analysis

TL;DR: A 2026 longitudinal analysis in the Journal of Affective Disorders tracked 635 older adults with new-onset loneliness and found that cognitive decline matched controls before loneliness began, then accelerated after onset, especially when loneliness persisted. Key Findings Pre-loneliness cognitive trajectories were identical: Before the first reported episode of loneliness, cognitive scores in 635 future-lonely …

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GABA and Dopamine Interacted During Human Speech Control

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GABA and Dopamine Interacted During Human Speech Control

TL;DR: A 2026 Human Brain Mapping study combined PET receptor imaging with speech functional MRI, or fMRI, in healthy adults and found that GABA signaling and striatal dopamine release interacted with brain activity during human speech control. Key Findings PET-fMRI sample: The study included 17 right-handed volunteers, with mean age about 53 years. Receptor tracers …

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Parkinson’s Patients Had a Prominent Mood-Sleep Cluster

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Parkinson's Patients Had a Prominent Mood-Sleep Cluster

TL;DR: A 2026 preprint on medRxiv using the Harvard Biomarkers Study found that 43% of Parkinson’s disease patients had depression, anxiety, sleep apnea, or restless legs syndrome, compared with 21% of controls. Key Findings 1,224-person cohort: Researchers analyzed 933 Parkinson’s disease cases and 291 controls in the Harvard Biomarkers Study. 43% mood-sleep burden: At least …

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Psilocybin Increased 6-Month Smoking Abstinence to 40% vs 10% on Nicotine Patch

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Psilocybin Increased 6-Month Smoking Abstinence to 40% vs 10% on Nicotine Patch

TL;DR: A 2026 randomized clinical trial in JAMA Network Open found that one supervised 30 mg/70 kg psilocybin dose plus cognitive behavioral therapy produced 40.5% six-month smoking abstinence versus 10.0% with a nicotine patch plus the same therapy. Key Findings 40.5% vs. 10% prolonged abstinence at 6 months: 17 of 42 psilocybin participants stayed biochemically …

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