Oliver Speck

Field-Correcting GRAPPA (FCG): a technique to correctspatiotemporal-varying phase errors in Echo Planar Imaging

This paper introduces FCG, a technique that corrects spatiotemporal-varying phase errors in EPI using an MLP, improving image quality on high-performance systems.

Different dopaminergic circuits defined by D2/D3 receptor availablity patterns show structure-specific links to memory in ageing

This study links dopamine receptor availability in specific brain regions to memory performance in older adults, identifying distinct dopaminergic circuits associated with different memory outcomes.

Individualized Phenotyping of Functional ALS Pathology in Sensorimotor Cortex

This study uses 7T-fMRI to identify functional connectivity patterns in ALS patients that predict disease onset and progression, showing that disease-defining regions are not always the first behaviorally affected areas.

Decoding Salience: A Functional Magnetic Resonance Imaging Investigation of Reward and Contextual Unexpectedness in Memory Encoding and Retrieval

This study investigates how reward and contextual unexpectedness affect memory encoding and retrieval using fMRI, identifying distinct brain regions and pathways involved.

VesselBoost: A Python Toolbox for Small Blood Vessel Segmentation in Human Magnetic Resonance Angiography Data

VesselBoost is a Python tool for segmenting small blood vessels in human MRA data using deep learning and data augmentation to overcome labeling challenges.

Cortical sensory aging is layer-specific

This study investigates age-related changes in cortical layer architecture and sensory function across species, finding layer-specific alterations in myelination and neuronal activity.

Reduced dimension stimulus decoding and column-based modeling reveal architectural differences of primary somatosensory finger maps between younger and older adults

The paper uses shared response modeling to detect age-related differences in finger maps in the primary somatosensory cortex between younger and older adults.

It is the Locus Coeruleus! Or... is it? : A proposition for analyses and reporting standards for structural and functional magnetic resonance imaging of the noradrenergic Locus Coeruleus

This paper proposes spatial transformation and quality assessment methods for reliably imaging the small noradrenergic locus coeruleus using structural and functional MRI.

The 3D Structural Architecture of the Human Hand Area is Non-Topographic

The paper uses 7T MRI to analyze 3D structural features in the human hand area of S1 and finds no topographic organization, unlike in some monkeys.

Imaging of the pial arterial vasculature of the human brain in vivo using high-resolution 7T time-of-flight angiography

This study demonstrates that high-resolution 7T time-of-flight MRI can image pial arteries in vivo, showing that resolution, not blood flow speed, limits visualization of these vessels.

Perceived and mentally rotated contents are differentially represented in cortical depth of V1

The paper shows that perceived and mentally rotated visual contents are represented in different cortical depth regions of V1, suggesting functional segregation through anatomical compartmentalization.

Dissociable roles of cortical excitation-inhibition balance during patch-leaving versus value-guided decisions

The paper shows that cortical excitation-inhibition balance in different brain regions is associated with distinct decision-making processes: patch-leaving in dACC and value-guided choices in vmPFC.

Triple visual hemifield maps in optic chiasm hypoplasia

The paper investigates visual cortex plasticity in a rare case of optic chiasm hypoplasia, finding three hemifield maps in one hemisphere and suggesting developmental re-wiring supports their function.

The effect of acquisition resolution on orientation decoding from V1: comparison of 3T and 7T

This study compares decoding performance of visual orientation from 3T and 7T fMRI data, finding that 3T decoding is impaired but can be improved with additional voxel selection at 3mm resolution.

The effect of acquisition resolution on orientation decoding from V1 BOLD fMRI at 7 Tesla

This study investigates how different acquisition resolutions affect orientation decoding from V1 BOLD fMRI data and finds that higher resolution does not improve decoding accuracy.