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Frank Scharnowski

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Publications associées (36)

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Real-time fMRI neurofeedback: Progress and challenges

Frank Scharnowski, Maria Laura Blefari

In February of 2012, the first international conference on real time functional magnetic resonance imaging (rtfMRI) neurofeedback was held at the Swiss Federal Institute of Technology Zurich (ETHZ), Switzerland. This review summarizes progress in the field ...

Elsevier2013

Time and the brain: neurorelativity. The chronoarchitecture of the brain from the neuronal rather than the observer's perspective

Frank Scharnowski

Naturally, neuroscientists look at the brain from the outside when measuring how the flow of information unfolds over space and time. A neuron, on the other hand, can only 'see' through its connections, and they are spatiotemporally limited. Hence, the neu ...

Elsevier2013

Two primes priming: Does feature integration occur before response activation?

Michael Herzog, Frank Scharnowski, Thomas Schmidt, Julianne Grainger

Responses to a target can be sped up or slowed down by a congruent or incongruent prime, respectively. Even though presentations are rapid, the prime and the target are thought to activate motor responses in strict sequence, with prime activation preceding ...

Association for Research in Vision and Ophthalmology2013

Improving Visual Perception through Neurofeedback

Frank Scharnowski

Perception depends on the interplay of ongoing spontaneous activity and stimulus-evoked activity in sensory cortices. This raises the possibility that training ongoing spontaneous activity alone might be sufficient for enhancing perceptual sensitivity. To ...

Society for Neuroscience2012

Automatic grouping of regular structures

Michael Herzog, Frank Scharnowski

To cope with the continuously incoming stream of input, the visual system has to group information across space and time. Usually, spatial and temporal grouping are investigated separately. However, recent findings revealed that these two grouping mechanis ...

Association for Research in Vision and Ophthalmology2010

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The human brain analyzes a visual object first by basic feature detectors. On the objects way to a conscious percept, these features are integrated in subsequent stages of the visual hierarchy. The time course of this feature integration is largely unknown ...

Association for Research in Vision and Ophthalmology2009

Spatial grouping determines temporal integration

Michael Herzog, Frank Scharnowski

To make sense out of a continuously changing visual world, people need to integrate features across space and time. Despite more than a century of research, the mechanisms of features integration are still a matter of debate. To examine how temporal and sp ...

American Psychological Association2009

Transcranial magnetic stimulation (TMS) of early visual but not frontal cortices reveals a feature memory of substantial duration

Michael Herzog, Frank Scharnowski, Johannes Rüter, Nicole Lironi

Objective: How the brain achieves integration of temporally dispersed information is one of the enigmas in the neurosciences. By combining feature fusion with transcranial magnetic stimulation (TMS), we show that individual visual features are stored for s ...

2008

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When a right offset vernier is immediately followed by a left offset vernier (or vice versa), only one vernier is perceived. Feature fusion has occurred. In feature fusion, observers cannot resolve the two verniers individually. Subjects perform at chance ...

Association for Research in Vision and Ophthalmology2008

How TMS and (light) masks modulate feature integration

Michael Herzog, Frank Scharnowski, Johannes Rüter

2008