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Esketamine Can Trigger Trauma Re-Experiencing in PTSD

Photoreal illustration of a patient receiving nasal spray with overlay of trauma memory imagery, conveying esketamine + PTSD interaction.

A 2026 retrospective case series of 22 adults with treatment-resistant depression and comorbid PTSD found that trauma re-experiencing during intranasal esketamine disappeared over later sessions in 72.7% of patients, while 27.3% stopped esketamine because the flashbacks persisted.1 Research Highlights Flashbacks usually faded, but not always: In 16 of 22 patients (72.7%), esketamine-related trauma re-experiencing disappeared …

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Prior Cocaine Use Disrupts Orbitofrontal Hidden-State Coding

MHD featured image for Prior Cocaine Use Disrupts Orbitofrontal Hidden-State Coding.

A 2026 eLife study recorded 3,881 lateral orbitofrontal cortex units in rats and found that prior cocaine use made the OFC over-distinguish task positions that controls treated as functionally equivalent. The headline result was not gross task failure: cocaine-experienced rats still performed the odor task, but their OFC ensembles showed higher S1-vs.-S2 decoding than sucrose …

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1 mg Guanfacine for Self-Harm Thoughts in ADHD-PTSD-BPD Case

MHD featured image for 1 mg guanfacine and self-harm thoughts in complex ADHD, PTSD, BPD, and ASD comorbidity.

A 2026 case report linked 1 mg nightly guanfacine modified-release to first-ever cessation of intrusive deliberate self-harm thoughts in a 16-year-old with attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD) traits, borderline personality disorder (BPD) traits, and post-traumatic stress disorder (PTSD). The same case became more interesting after the patient stopped taking guanfacine and the self-harm …

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Friedreich Ataxia MRI Study Finds 3 Progression Subtypes

Photoreal illustration of brain regions affected in Friedreich ataxia with overlay of MRI imaging modalities, conveying multi-pattern subtypes.

A 2026 longitudinal MRI preprint involving 54 people with Friedreich ataxia and 57 controls found 3 biologically interpretable progression subtypes: microstructure-dominant, macrostructure-dominant, and minimal/no progression.1 The clusters make biomarker heterogeneity visible at the research level, while the classifier remains too early to assign individual patients to treatment paths. Research Highlights 3 MRI progression subtypes emerged: …

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Migrant Stroke Patients Had 1.90x Higher Late-Arrival Odds

Photoreal illustration of a stroke patient in an emergency room with overlay of treatment-eligibility imagery, conveying disparities in acute-stroke care.

A 2026 Dutch stroke-center cohort found the opposite of the damaged draft’s claim: patients with a migration background were more likely to reach the hospital outside the therapeutic window for acute reperfusion therapy, and they had sharply lower odds of receiving endovascular thrombectomy.1 Research Highlights Late arrival was the clearest disparity: 53.2% of migrant-background patients …

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