MentalHealthDaily

Autism vs. ADHD Connectome Study: Frontal-DMN Signal Tracks Autism Severity

by GLOOM

MHD featured image for autism, ADHD, and connectome-based symptom mapping.

A 166-child resting-state fMRI study found that clinician-observed autism severity, not ADHD severity, tracked connectivity strength between a left middle frontal gyrus node and the posterior cingulate/default mode network across children diagnosed with autism or ADHD without autism. The result is transdiagnostic, but asymmetrical: autism traits carried the connectome signal after ADHD ratings were controlled.1 …

Childhood Anxiety Linked to DNA Methylation and DMN-Limbic Development

by GLOOM

MHD featured image for childhood anxiety, DNA methylation, and DMN-limbic network development.

A 2026 Singapore birth-cohort preprint found a conditional childhood-anxiety signal: the cord-blood DNA methylation component predicted less age-13 anxiety only in boys in the low DMN-limbic trajectory group from ages 4.5 to 10.5 years. The paper is useful for mapping developmental risk biology, but it is not a screening test and it does not show …

PTSD Trauma Memories Are Encoded in Hippocampal Semantic Maps

by GLOOM

Photoreal illustration of the hippocampus with semantic encoding pathways highlighted, representing trauma memory processing in PTSD.

A 2026 fMRI study of 79 women with interpersonal-violence-related PTSD found that the hippocampus does encode the meaning of autobiographical trauma narratives, t(140) = 4.05, p < 0.001, even though average hippocampal encoding did not rise for trauma vs. neutral memories. Research Highlights Hippocampal semantic encoding was significant: Cisler et al. analyzed 3,928 narrative sentences …

fMRI Biotypes Predicted tDCS Anxiety Response in Older Adults

by GLOOM

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 …

Lisdexamfetamine (Vyvanse) Changes Brain Connectivity & Activation to Treat Binge Eating Disorder (2023 Study)

by GLOOM

Binge-eating disorder (BED), characterized by recurrent episodes of overeating without compensatory behaviors, is a significant global health concern. Lisdexamfetamine dimesylate (LDX), the only drug approved for moderate to severe BED, is showing promise not just in reducing episodes but also in altering brain function in ways previously not fully understood. Through a groundbreaking study, researchers …

Escitalopram (Lexapro) Normalizes Brain Connectivity in Major Depression (2024 Study)

by GLOOM

Major Depressive Disorder (MDD) significantly alters the brain’s network connectivity, with disturbances in the default mode network (DMN), salience network (SN), and dorsal attention network (DAN). A new study reveals how escitalopram, a common antidepressant, can partially reverse these abnormalities, offering insights into the biological underpinnings of its therapeutic effects. This research deepens our understanding …

Effects of Coffee & Caffeine on Brain Connectivity in Habitual Drinkers (2023 Study)

by GLOOM

Coffee, one of the world’s most consumed beverages, is often lauded for its ability to enhance alertness and cognitive performance. Recent studies utilizing advanced neuroimaging techniques like resting-state functional magnetic resonance imaging (fMRI) have begun to unravel the intricate ways in which coffee, and its key component caffeine, modulate brain activity. This exploration into the …