hit counter

Subthreshold Depression Linked to Inflammation and Altered Brain Connectivity

MHD card showing a side-view brain with a glowing crimson cingulate arc and a blood vessel releasing small red particles, illustrating a study in which university students with subthreshold depression had altered brain connectivity and slightly higher inflammatory proteins.

University students with subthreshold depression, meaning real depressive symptoms that fall short of a major depression diagnosis, had stronger connections in 3 cingulate brain circuits and slightly higher levels of 3 inflammatory proteins than healthy students, according to a 2026 brain-imaging study from China.1 Research Highlights Stronger cingulate connections: resting brain scans of 126 students …

Read more

Parcel-Guided rTMS for Treatment-Resistant Depression: 6 of 11 Remitted in Pilot

MHD card showing a dark violet mosaic of irregular brain-atlas parcels, with three highlighted parcels meeting at a glowing crosshair target beneath a figure-eight TMS coil, illustrating parcel-guided rTMS for treatment-resistant depression.

Researchers aimed repetitive transcranial magnetic stimulation (rTMS), which uses magnetic pulses to stimulate brain cells, at a spot chosen from each person’s own brain scan. In a small Columbia University pilot, 6 of 11 adults with treatment-resistant depression ended with low depression scores that met the trial’s remission threshold.1  Research Highlights Symptoms improved at the …

Read more

Substance Use Disorder Brain Connectivity in 53 Studies

MHD featured image for substance use disorder, resting-state fMRI, reward circuitry, and brain connectivity meta-analysis.

A 53-study resting-state functional magnetic resonance imaging (fMRI) meta-analysis found substance use disorder (SUD) linked to altered connectivity across prefrontal, striatal, thalamic, cingulate, and amygdala circuits. The most clinically relevant finding was an impulsivity correlation, not a diagnostic brain signature. Research Highlights Meta-analysis scale was meaningful: Zhang et al. pooled 53 whole-brain resting-state functional magnetic …

Read more

PMDD Imaging Shows Higher Glymphatic and Hypothalamus Signals

MHD featured image for PMDD glymphatic activity and hypothalamus connectivity.

A 2026 case-control imaging study found that 23 women with premenstrual dysphoric disorder had higher left DTI-ALPS glymphatic index than 27 healthy controls (p = 0.024), plus wider hypothalamus connectivity across emotion and subcortical networks.1 The result adds a brain-fluid-clearance and stress-network layer to PMDD biology, but the evidence is still small-sample imaging rather than …

Read more

Neonatal Brain MRI Shows Gyri Are Connectivity Hubs by 38-44 Weeks

MHD featured image for neonatal MRI, cortical gyri, sulci, and early brain connectivity.

A 2026 developing Human Connectome Project analysis of 438 full-term neonates found that the newborn cortex already had an adult-like folding hierarchy: gyri connected most strongly to other gyri, sulci connected most weakly to other sulci, and structure-function coupling shifted near 41 to 42 weeks postmenstrual age.1 Research Highlights Gyri were already high-connectivity hubs: across …

Read more

REDDI MEG Classifier Separated 4 Neurodegenerative Diseases at 0.81

MHD featured image for REDDI MEG differential diagnosis research.

A 2026 medRxiv preprint found that REDDI, a resting-state magnetoencephalography machine-learning pipeline, separated mild cognitive impairment, multiple sclerosis, Parkinson’s disease, and amyotrophic lateral sclerosis with 0.81 ± 0.04 balanced accuracy across 5 folds.1 That is a meaningful jump over the prior 67.1% MEG benchmark, but it is still research-stage decision support rather than a clinical …

Read more

Subcortical Connectivity Differs in Schizophrenia, Bipolar, Depression

MHD featured image for subcortical connectivity patterns across schizophrenia, bipolar disorder, and depression.

A 2026 resting-state fMRI study of 800 adults found intra-thalamic hypoconnectivity across schizophrenia, bipolar disorder, and major depression, but schizophrenia showed far broader subcortical dysconnectivity than bipolar disorder or depression.1 The calibrated read is that these diagnoses may share a thalamic vulnerability while diverging in striatal and limbic circuitry. Research Highlights Shared thalamic deficit: In …

Read more