Øystein Sørensen

This study identifies how different environmental factors affect cortical architecture in twins, showing persistent early life effects and training-induced changes in adulthood.

The paper identifies a subset of older adults with stable memory performance over time, linking this stability to brain structure and showing it is often transient rather than consistent.

This study examines how brain volume differences in adults are stable from young adulthood or change with age, using MRI data from 8,311 individuals.

The paper shows cortical thickness changes occur years before high amyloid levels in Alzheimer's disease, challenging the view that amyloid is the first imaging marker.

This study investigates the relationship between brain atrophy and memory decline in aging using longitudinal data, finding a nonlinear association that intensifies with age and is influenced by APOE ε4 carriership.

The paper examines how brain network segregation relates to episodic memory performance across age, finding age-invariant associations between functional connectivity and memory.

This study assesses the reliability of structural brain change in cognitively healthy adults over time, finding that longer follow-up periods significantly improve reliability compared to increasing observation frequency.

The paper identifies subtypes of brain structural changes in aging and links them to cognitive decline and Alzheimer's disease biomarkers using MRI data.

The study investigates whether superior memory in older adults (SuperAgers) is linked to unique brain features, finding stable correlates of memory function across age without evidence of aging-specific differences.

The paper shows that higher genetic risk for Alzheimer's disease is linked to faster brain volume loss and memory decline in healthy adults.

This study identifies stable and task-specific hippocampal-cortical connectivity patterns during memory encoding and retrieval using fMRI data from two large-scale studies.

The paper investigates the effects of short sleep on brain structure and cognitive function, finding that short sleepers without daytime tiredness have larger brain volumes but slightly lower cognitive scores.

This study shows that birth weight consistently correlates with cortical surface area and volume across the lifespan, suggesting prenatal growth influences brain structure through brain reserve rather than maintenance.

The paper investigates how general cognitive ability relates to cortical brain volume changes over time, finding associations with both brain reserve and maintenance mechanisms.

This study examines the relationship between sleep duration and brain structure using MRI data, finding that 6.8 hours of sleep is associated with the most favorable brain outcomes, with genetic analyses suggesting homeostatic regulation of sleep duration.

This study finds that adult brain age is more influenced by early life factors like birth weight and polygenic scores than by longitudinal brain decline.

The paper examines how education and income relate to brain and cognitive differences across European and US cohorts, finding heterogeneous effects and stronger associations in US samples.

This paper compares two whole-brain segmentation methods, ASEG and SAMSEG, in FreeSurfer, finding SAMSEG provides more reliable and sensitive measurements for detecting longitudinal changes and Alzheimer's disease-related atrophy.

This study finds that worse self-reported sleep relates to faster hippocampal microstructural decline in β-amyloid positive adults, independent of genetic risk.

The paper identifies asymmetric thinning of the cerebral cortex across aging and Alzheimer's Disease, showing that the initially thicker hemisphere thins faster, with this pattern replicated across multiple cohorts.

The paper links cortical thinning across the lifespan to gene expression profiles of specific cell types using gene expression data and MRI datasets.

This study investigates whether the functional foundations of episodic memory encoding remain consistent across the lifespan, finding continuity rather than late-life specificity.

This study shows genetic risk for Alzheimer's disease affects hippocampal volume throughout life in a healthy population.

This paper identifies stable developmental clusters of subcortical volumetric change across the lifespan and shows genetic organization within these clusters.

The paper examines the relationship between self-reported sleep parameters and cortical thinning in aging, finding associations with specific brain regions but not with memory decline or amyloid-β accumulation.

The paper examines how self-reported sleep relates to hippocampal atrophy across adulthood using data from the Lifebrain consortium and UK Biobank, finding that worse sleep is linked to faster hippocampal volume loss over time.

The paper examines developmental changes in extended delay memory and links them to structural hippocampal features in children and adolescents.