Stephan Geuter

Expectation generation and its effect on subsequent pain and visual perception

The paper tests how expectations influence perception of pain and visual contrast, finding modality-specific effects and higher-level neural mechanisms.

Evoked pain intensity representation is distributed across brain systems: A multistudy mega-analysis

This study investigates the spatial scale of acute pain representation using fMRI data from 289 participants, finding that distributed, multi-system models better capture pain intensity than single regions or networks.

Multiple brain networks mediating stimulus-pain relationships in humans

The paper identifies brain networks mediating stimulus-pain relationships using high-dimensional mediation analysis in fMRI data from 284 humans.

Modular preprocessing pipelines can reintroduce artifacts into fMRI data

This paper shows that modular fMRI preprocessing pipelines can reintroduce artifacts by sequentially projecting data into non-orthogonal subspaces, and suggests remedies like combining steps into a single filter or orthogonalizing them.

Effect Size and Power in fMRI Group Analysis

Subsampling 491 Human Connectome Project subjects puts numbers on fMRI group analysis: roughly 40 subjects catch large effects (d > 0.8), near 80 are needed for medium ones.