João Pedro Forjaco Jorge

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Related publications (28)

Fourier modeling of the BOLD response to a breath-hold task: Optimization and reproducibility

João Pedro Forjaco Jorge, Patricia Figueiredo, Inês Nunes de Sousa

Cerebrovascular reactivity (CVR) reflects the capacity of blood vessels to adjust their caliber in order to maintain a steady supply of brain perfusion, and it may provide a sensitive disease biomarker. Measurement of the blood oxygen level dependent (BOLD ...

Elsevier2016

Simultaneous EEG-fMRI at ultra-high field for the study of human brain function

João Pedro Forjaco Jorge

Scalp electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) have highly complementary domains, and their combination has been actively sought within neuroscience research. The important gains in fMRI sensitivity achieved with higher ...

EPFL2016

Physiological noise in human cerebellar fMRI

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Denis Butticaz

Objectives To compare physiological noise contributions in cerebellar and cerebral regions of interest in high-resolution functional magnetic resonance imaging (fMRI) data acquired at 7T, to estimate the need for physiological noise removal in cerebellar f ...

Springer Verlag2015

Simultaneous EEG–fMRI at ultra-high field: Artifact prevention and safety assessment

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Özlem Ipek, Patricia Figueiredo

The simultaneous recording of scalp electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) can provide unique insights into the dynamics of human brain function, and the increased functional sensitivity offered by ultra-high field fM ...

Elsevier2015

Towards high-quality simultaneous EEG-fMRI at 7T: Detection and reduction of EEG artifacts due to head motion

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Patricia Figueiredo

The enhanced functional sensitivity offered by ultra-high field imaging may significantly benefit simultaneous EEG-fMRI studies, but the concurrent increases in artifact contamination can strongly compromise EEG data quality. In the present study, we focus ...

Elsevier2015

EEG-fMRI integration for the study of human brain function

Wietske Van der Zwaag, João Pedro Forjaco Jorge, Patricia Figueiredo

Electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) have proved to be extremely valuable tools for the non-invasive study of human brain function. Moreover, due to a notable degree of complementarity between the two modalities, th ...

Elsevier2014

Signal fluctuations in fMRI data acquired with 2D-EPI and 3D-EPI at 7 Tesla

Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques, João Pedro Forjaco Jorge, Patricia Figueiredo

Segmented three-dimensional echo planar imaging (3D-EPI) provides higher image signal-to-noise ratio (SNR) than standard single-shot two-dimensional echo planar imaging (2D-EPI), but is more sensitive to physiological noise. The aim of this study was to co ...

Elsevier Science Inc2012

Intra and cross-modal negative BOLD response to contrast-varying visual stimuli

Rolf Gruetter, Wietske Van der Zwaag, João Pedro Forjaco Jorge, Patricia Figueiredo

The BOLD contrast is widely used to study brain function. Under externally-applied stimuli, positive BOLD responses (PBR) are generally attributed to local increases in brain activity. Negative BOLD responses (NBR) are also frequently observed, but their u ...

2012

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