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Wietske Van der Zwaag

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Related publications (69)

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Tuning In to Sound: Frequency-Selective Attentional Filter in Human Primary Auditory Cortex

Wietske Van der Zwaag, Stephanie Clarke, Sandra Elisabete Monney, Melissa Saenz

Cocktail parties, busy streets, and other noisy environments pose a difficult challenge to the auditory system: how to focus attention on selected sounds while ignoring others? Neurons of primary auditory cortex, many of which are sharply tuned to sound fr ...

Society for Neuroscience2013

Whole brain measurements of the positive BOLD response variability during a finger tapping task at 7 T show regional differences in its profiles

Wietske Van der Zwaag, Yohan Boillat

PURPOSE: The positive BOLD response can vary across brain regions. Here, the positive BOLD responses of motor regions, including the cerebellum, were investigated by fast fMRI acquisition. METHODS: The participants were asked to perform an event-related fi ...

Wiley2019

In vivo Structural Imaging of the Cerebellum, the Contribution of Ultra-High Fields

Rolf Gruetter, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques

This review covers some of the contributions to date from cerebellar imaging studies performed at ultra-high magnetic fields. A short overview of the general advantages and drawbacks of the use of such high field systems for imaging is given. One of the bi ...

Springer-Verlag2012

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

A novel manipulation method of human body ownership using an fMRI-compatible master-slave system

Olaf Blanke, Tobias Kober, Wietske Van der Zwaag, Roy Salomon, Giulio Rognini

Bodily self-consciousness has become an important topic in cognitive neuroscience aiming to understand how the brain creates a unified sensation of the self in a body. Specifically, full body illusion (FBI) in which changes in bodily self-consciousness are ...

Elsevier2014

Presurgical brain mapping in epilepsy using simultaneous EEG and functional MRI at ultra-high field: feasibility and first results

Wietske Van der Zwaag, François Lazeyras, João Pedro Forjaco Jorge

OBJECTIVES: The aim of this study was to demonstrate that eloquent cortex and epileptic-related hemodynamic changes can be safely and reliably detected using simultaneous electroencephalography (EEG)-functional magnetic resonance imaging (fMRI) recordings ...

Springer Verlag2016

Sustained enhancements in inhibitory control depend primarily on the reinforcement of fronto-basal anatomical connectivity

Wietske Van der Zwaag

What are the neurophysiological determinants of sustained supra-normal inhibitory control performance? We addressed this question by coupling multimodal neuroimaging and behavioral investigations of experts in fencing who underwent more than 20,000 h of in ...

Springer Heidelberg2017

MP2RAGE, a self bias-field corrected sequence for improved segmentation and T-1-mapping at high field

Rolf Gruetter, Tobias Kober, José Pedro Rebelo Ferreira Marques, Wietske Van der Zwaag, Gunnar Krüger

The large spatial inhomogeneity in transmit B, field (B-1(+)) observable in human MR images at hi h static magnetic fields (B-0) severely impairs image quality. To overcome this effect in brain T-1-weighted images the, MPRAGE sequence was modified to gener ...

Elsevier2010

Eddy current effects on a clinical 7T-68 cm bore scanner

Rolf Gruetter, Tobias Kober, José Pedro Rebelo Ferreira Marques, Wietske Van der Zwaag, Gunnar Krüger

Eddy currents induced by switching of magnetic field gradients can lead to distortions in short echo-time spectroscopy or diffusion weighted imaging. In small bore magnets, such as human head-only systems, minimization of eddy current effects is more deman ...

2010

Tonotopic Gradients in Human Primary Auditory Cortex: Concurring Evidence From High-Resolution 7 T and 3 T fMRI

Wietske Van der Zwaag, Stephanie Clarke, Sandra Elisabete Monney, Melissa Saenz

The tonotopic representations within the primary auditory cortex (PAC) have been successfully mapped with ultra-high field fMRI. Here, we compared the reliability of this tonotopic mapping paradigm at 7 T with 1.5 mm spatial resolution with maps acquired a ...

Springer2015

Chronotopic maps in human supplementary motor area

Wietske Van der Zwaag, Domenica Bueti

Time is a fundamental dimension of everyday experiences. We can unmistakably sense its passage and adjust our behavior accordingly. Despite its ubiquity, the neuronal mechanisms underlying the capacity to perceive time remains unclear. Here, in two experim ...

2019

Stroking or Buzzing? A Comparison of Somatosensory Touch Stimuli Using 7 Tesla fMRI

Rolf Gruetter, Wietske Van der Zwaag, Roberto Martuzzi

Studying body representations in the brain helps us to understand how we humans relate to our own bodies. The in vivo mapping of the somatosensory cortex, where these representations are found, is greatly facilitated by the high spatial resolution and high ...

Public Library of Science2015

Physiological noise in human cerebellar fMRI

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

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

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

Surface-based characteristics of the cerebellar cortex visualized with ultra-high field MRI

Wietske Van der Zwaag, Cristina Granziera, Gunnar Krüger, Guillaume Bonnier, Kieran O'Brien, Yohan Boillat

Although having a relatively homogeneous cytoarchitectonic organization, the cerebellar cortex is a heterogeneous region characterized by different amounts of myelin, iron and protein expression profiles. In this study, we used quantitative T1 and T2* mapp ...

2018

Improved temporal resolution for functional studies with reduced number of segments with three-dimensional echo planar imaging

Rolf Gruetter, Tobias Kober, Wietske Van der Zwaag, José Pedro Rebelo Ferreira Marques, Mayur Narsude

PURPOSE: To introduce a new k-space traversal strategy for segmented three-dimensional echo planar imaging (3D EPI) that encodes two partitions per radiofrequency excitation, effectively reducing the number excitations used to acquire a 3D EPI dataset by h ...

Wiley-Blackwell2014

In vivo measurement of glycine with short echo-time H-1 MRS in human brain at 7 T

Rolf Gruetter, Lijing Xin, Wietske Van der Zwaag, Gunnar Krüger, Giulio Gambarota

To determine whether glycine can be measured at 7 T in human brain with H-1 magnetic resonance spectroscopy (MRS). ...

2009

Neural correlates of non-retinotopic processing in human visual cortex as determined by 7T fMRI and high-density EEG

Michael Herzog, Wietske Van der Zwaag, Gijs Plomp, Yvonne Evelina Thunell

Human perception is largely non-retinotopic. A bike passes by; we perceive the reflectors on its wheels rotating on a circular orbit. However, the “real” motion is truly different, namely cycloidal. The real, retinotopic motion is invisible because the bik ...

2014

The neural correlates of non-retinotopic processing in human visual cortex: a 7T fMRI study

Michael Herzog, Wietske Van der Zwaag, Gijs Plomp, Yvonne Evelina Thunell

Under normal viewing conditions, due to e.g. the motion of objects, the retinotopic representation of the environment constantly changes. Yet we perceive the world as stable and we easily keep track of moving objects, indicating the presence of non-retinot ...

Association for Research in Vision and Ophthalmology2013

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

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

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