Publications de Gijs Plomp | EPFL Graph Search

Selective attention involves a feature-specific sequential release from inhibitory gating

Selective attention is a fundamental cognitive mechanism that allows our brain to preferentially process relevant sensory information, while filtering out distracting information. Attention is thought to flexibly gate the communication of irrelevant inform ...

2022

The connectome spectrum as a canonical basis for a sparse representation of fast brain activity

Patric Hagmann, Gijs Plomp, David Pascucci

The functional organization of neural processes is constrained by the brain's intrinsic structural connectivity, i.e., the connectome. Here, we explore how structural connectivity can improve the representation of brain activity signals and their dynamics. ...

ACADEMIC PRESS INC ELSEVIER SCIENCE2021

The anisotropic field of ensemble coding

Gijs Plomp, David Pascucci

Human observers can accurately estimate statistical summaries from an ensemble of multiple stimuli, including the average size, hue, and direction of motion. The efficiency and speed with which statistical summaries are extracted suggest an automatic mecha ...

Nature Research2021

Modeling time-varying brain networks with a self-tuning optimized Kalman filter

Gijs Plomp, David Pascucci

Brain networks are complex dynamical systems in which directed interactions between different areas evolve at the sub-second scale of sensory, cognitive and motor processes. Due to the highly non-stationary nature of neural signals and their unknown noise ...

2020

Nested oscillations and brain connectivity during sequential stages of feature-based attention

Gijs Plomp, David Pascucci

Brain mechanisms of visual selective attention involve both local and network-level activity changes at specific oscillatory rhythms, but their interplay remains poorly explored. Here, we investigate anticipatory and reactive effects of feature-based atten ...

2020

Connectome spectral analysis to track EEG task dynamics on a subsecond scale

Patric Hagmann, Sébastien Tourbier, Gijs Plomp, Michaël Defferrard, David Pascucci

We present an approach for tracking fast spatiotemporal cortical dynamics in which we combine white matter connectivity data with source-projected electroencephalographic (EEG) data. We employ the mathematical framework of graph signal processing in order ...

2020

Retinotopic encoding of the Ternus-Pikler display reflected in the early visual areas

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

The visual representation of the world is often assumed to be retinotopic, and many visual brain areas are indeed organized retinotopically. Visual perception, however, is not based on a reference frame anchored in retinotopic coordinates. For example, whe ...

Association for Research in Vision and Ophthalmology (ARVO)2016

EEG Correlates of Relative Motion Encoding

Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp

A large portion of the visual cortex is organized retinotopically, but perception is usually non-retinotopic. For example, a reflector on the spoke of a bicycle wheel appears to move on a circular or prolate cycloidal orbit as the bicycle moves forward, wh ...

Springer Verlag2016

EEG and fMRI correlates of non-retinotopic motion processing in the human visual system

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

Association for Research in Vision and Ophthalmology2015

Different colors of light lead to different adaptation and activation as determined by high-density EEG

Jean-Louis Scartezzini, Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp, Mirjam Münch

Light adaptation is crucial for coping with the varying levels of ambient light. Using high-density electroencephalography (EEG), we investigated how adaptation to light of different colors affects brain responsiveness. In a within-subject design, sixteen ...

Elsevier2014

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

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

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

Neural correlates of visual crowding

Michael Herzog, Gijs Plomp, Vitaly Chicherov

In visual crowding, target discrimination strongly deteriorates when flanking elements are added. We have recently shown that crowding cannot be explained by simple low-level interactions and that grouping is a key component instead. We presented a vernier ...

Elsevier2014

Electrophysiological Evidence for Ventral Stream Deficits in Schizophrenia Patients

Michael Herzog, Gijs Plomp, Maya Roinishvili

Schizophrenic patients suffer from many deficits including visual, attentional, and cognitive ones. Visual deficits are of particular interest because they are at the fore-end of information processing and can provide clear examples of interactions between ...

Oxford Univ Press2013

The neural correlates of non-retinotopic motion integration as revealed by high-density EEG

Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp

Under normal viewing conditions, due to the motion of objects and to eye movements, the retinotopic representation of the environment constantly changes. Yet we perceive the world as stable, and we easily keep track of moving objects. Here, we investigated ...

2013

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

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

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

How are non-retinotopic motion signals integrated? -A high-density EEG study

Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp

Objects moving in the visual scene cause retinal displacements that are not the result of motor commands and thus cannot be accounted for by efference copies. Yet, we easily keep track of moving objects even without following them with our gaze. Here, we i ...

2013

Age-related changes in visually evoked electrical brain activity

Michael Herzog, Gijs Plomp

Whereas much is known about the degenerative effects of aging on cortical tissue, less is known about how aging affects visually evoked electrical activity, and at what latencies. We compared visual processing in elderly and young controls using a visual m ...

Wiley-Blackwell2012

Decoding stimulus-related information from single-trial EEG responses based on voltage topographies

Michael Herzog, Gijs Plomp, Athina Tzovara

Neuroimaging studies typically compare experimental conditions using average brain responses, thereby overlooking the stimulus-related information conveyed by distributed spatio-temporal patterns of single-trial responses. Here, we take advantage of this r ...

Elsevier2012

Neural correlates of non-retinotopic motion integration

Michael Herzog, Yvonne Evelina Thunell, Gijs Plomp

Under normal viewing conditions, due to the motion of objects and to eye movements, the retinotopic representation of the environment constantly changes. Yet we perceive the world as stable, and we easily keep track of moving objects. Here, we investigated ...

Association for Research in Vision and Ophthalmology2012

Crowding suppresses the N1 wave

Michael Herzog, Gijs Plomp, Vitaly Chicherov

Flankers can strongly deteriorate performance on a visual target (crowding). For example, vernier offset discrimination is strongly affected by neighboring flankers. Interestingly, performance for longer and shorter flankers is better than performance for ...

Pion Ltd2012