Guillermo Horga

This study investigates the relationship between groove experience and neuromelanin levels in the substantia nigra, finding that higher neuromelanin levels and male sex are associated with higher pleasure ratings in younger individuals.

This paper develops a computational model linking striatal dopamine levels to auditory hallucinations through corticostriatal plasticity and validates it with mouse and human data.

The paper examines intrinsic neural timescales in AD and MCI using rs-fMRI data, finding altered hierarchical gradients and potential biomarker value for AD prediction.

This study evaluates how motion and respiration artifacts affect intrinsic neural timescale estimation in fMRI and tests denoising strategies to mitigate these effects.

The paper develops a thalamic localizer fMRI task to functionally define MGN and LGN regions in human participants using 3 Tesla multiband fMRI, and validates their use in resting-state functional connectivity analyses.

The paper develops a Bayesian model and psychophysics paradigm to study insight in motion after-effect illusions, showing participants can compensate for perceptual distortions through inferential adjustments.

The paper shows that covert attention is guided by expected information gain, with neural mechanisms involving the fronto-parietal network and interactions with the medial prefrontal cortex.

The paper uses fMRI to show that posterior parietal and extrastriate cortices represent expected posterior certainty during active information seeking, supporting the computation of expected information gain.

The paper reports normative values for neuromelanin-sensitive MRI (NM-MRI) signal and volume in older adults and identifies a significant annual decrease in left substantia nigra volume.

This study investigates overharvesting behavior in opioid use disorder using a patch-foraging task and neuromelanin-sensitive MRI, finding a link between ventral tegmental area function and maladaptive reward pursuit.

This study uses fMRI to show that left posterior parietal cortex tracks Bayesian inference components during a probabilistic decision task.

The paper investigates hierarchical alterations in intrinsic neural timescales in psychosis, finding distinct patterns in hallucinations and delusions.

The paper shows that conflict in the dorsal anterior cingulate cortex (dACC) amplifies task-relevant information across neurons, rather than relying on specific conflict-encoding neurons or coactivation of action plans.

This paper evaluates NM-MRI protocols for region-of-interest and voxelwise analyses, finding optimized acquisition and preprocessing parameters that improve signal strength and test-retest reliability.