A5065568970- Neural dynamics and brain function
- Visual perception and processing mechanisms
- Functional Brain Connectivity Studies
- Face Recognition and Perception
- Neural and Behavioral Psychology Studies
- Multisensory perception and integration
- Advanced MRI Techniques and Applications
- EEG and Brain-Computer Interfaces
- Advanced Neuroimaging Techniques and Applications
- Medical Imaging Techniques and Applications
- Neuroscience and Neural Engineering
- Cognitive and developmental aspects of mathematical skills
- Neurobiology and Insect Physiology Research
- Mathematics Education and Teaching Techniques
- Neuroscience and Music Perception
- Neural Networks and Applications
- Advanced Vision and Imaging
- Diet and metabolism studies
- Face recognition and analysis
- Aesthetic Perception and Analysis
- Mathematics Education and Pedagogy
- Photoreceptor and optogenetics research
- Action Observation and Synchronization
- Olfactory and Sensory Function Studies
- Glioma Diagnosis and Treatment
European Neuroscience Institute Göttingen
2017-2024
Universitätsmedizin Göttingen
2019-2024
Max Planck Institute for Multidisciplinary Sciences
2024
Max Planck Society
2011-2024
German Primate Center
2017-2024
Leibniz ScienceCampus Primate Cognition
2020-2024
Ruhr University Bochum
2024
Rockefeller University
2012-2018
Max Planck Institute for Brain Research
2007-2012
Brain (Germany)
2010-2012
In this functional magnetic resonance imaging study we tested whether the predictability of stimuli affects responses in primary visual cortex (V1). The results indicate that evoke smaller V1 when their onset or motion direction can be predicted from dynamics surrounding illusory motion. We conclude finding human brain anticipates forthcoming sensory input allows predictable to processed with less neural activation at early stages cortical processing.
Non-human primate neuroimaging is a rapidly growing area of research that promises to transform and scale translational cross-species comparative neuroscience. Unfortunately, the technological methodological advances past two decades have outpaced accrual data, which particularly challenging given relatively few centers necessary facilities capabilities. The PRIMatE Data Exchange (PRIME-DE) addresses this challenge by aggregating independently acquired non-human magnetic resonance imaging...
Previous experience allows the brain to predict what comes next. How these expectations affect conscious is poorly understood. In particular, it unknown whether and when interact with sensory evidence in granting access perception, how this reflected electrophysiologically. Here, we parametrically manipulate while measuring event-related potentials human subjects assess time course of evoked responses that correlate subjective visibility, properties stimuli, and/or perceptual expectations....
Predictions strongly influence perception. However, the neurophysiological processes that implement predictions remain underexplored. It has been proposed high- and low-frequency neuronal oscillations act as carriers of sensory evidence top-down predictions, respectively (von Stein Sarnthein 2000; Bastos et al. 2012). for latter hypothesis remains scarce. In particular, it to be shown whether slow prestimulus alpha in task-relevant brain regions are stronger presence they early...
Using predictions based on environmental regularities is fundamental for adaptive behavior. While it widely accepted that across different stimulus attributes (e.g., time and content) facilitate sensory processing, unknown whether these rely the same neural mechanism. Here, to elucidate mechanisms of predictions, we combine invasive electrophysiological recordings (human electrocorticography in 4 females 2 males) with computational modeling while manipulating about content (“what”) (“when”)....
Perception is an active inferential process in which prior knowledge combined with sensory input, the result of determines contents awareness. Accordingly, previous experience known to help brain "decide" what perceive. However, a critical aspect that has not been addressed can exert 2 opposing effects on perception: An attractive effect, sensitizing perceive same again (hysteresis), or repulsive making it more likely something else (adaptation). We used functional magnetic resonance imaging...
GENERAL COMMENTARY article Front. Integr. Neurosci., 18 May 2009 https://doi.org/10.3389/neuro.07.006.2009
Perceptual learning not only improves sensitivity, but it also changes our subjective experience. However, the question of how these two effects relate is largely unexplored. Here we investigate subjects learn to see initially indiscriminable metacontrast-masked shapes. We find that sensitivity and awareness increase with training. dissociate in space: Learning on performance are lost when task performed at an untrained location another quadrant, whereas maintained. This finding indicates...
What has transpired immediately before a strong influence on how sensory stimuli are processed and perceived. In particular, temporal context can have contrastive effects, repelling perception away from the interpretation of stimulus, attractive effects (TCEs), whereby repeats upon successive presentations same stimulus. For decades, scientists documented mostly with simple visual stimuli. But both types also occur in other modalities, e.g., audition touch, for varying complexity, raising...
Faces transmit a wealth of social information. How this information is exchanged between face-processing centers and brain areas supporting cognition remains largely unclear. Here we identify these routes using resting state functional magnetic resonance imaging in macaque monkeys. We find that face functionally connect to specific regions within frontal, temporal, parietal cortices, as well subcortical structures emotive, mnemonic, cognitive functions. This establishes the existence an...
Recent methodological advances in MRI have enabled substantial growth neuroimaging studies of non-human primates (NHPs), while open data-sharing through the PRIME-DE initiative has increased availability NHP data and need for robust multi-subject multi-center analyses. Streamlined acquisition analysis protocols would accelerate improve these efforts. However, consensus on minimal standards pipelines imaging remains to be established, particularly studies. Here, we draw parallels between...
Can practice effects on unconscious stimuli lead to awareness? we "learn see"? Recent evidence suggests that blindsight patients trained for an extensive period of time can learn discriminate and consciously perceive they were previously unaware of. So far, it is unknown whether these generalize normal observers. Here investigated in metacontrast masking. Subjects five consecutive days the stimulus onset asynchrony (SOA) resulted chance performance. Our results show a linear increase...
In 1957, Craig Mooney published a set of human face stimuli to study perceptual closure: the formation coherent percept on basis minimal visual information. Images this type, now known as "Mooney faces", are widely used in cognitive psychology and neuroscience because they offer means inducing variable perception with constant visuo-spatial characteristics (they often not perceived faces if viewed upside down). Mooney's original 40 has been employed several studies. However, it is necessary...
Pupil diameter determines how much light hits the retina and, thus, information is available for visual processing. This regulated by a brainstem reflex pathway. Here, we investigate whether this pathway under control of internal models about environment. would allow adjusting pupil dynamics to environmental statistics augment transmission. We present image sequences containing temporal structure humans either sex and male macaque monkeys. then measure tracks not only at rate luminance...
Abstract Distinguishing faces requires well distinguishable neural activity patterns. Contextual information may separate representations, leading to enhanced identity recognition. Here, we use functional magnetic resonance imaging investigate how predictions derived from contextual affect the separability of patterns in macaque face-processing system, a 3-level processing hierarchy ventral visual cortex. We find that presence predictions, early stages this exhibit separable and...
Perception of number and space are tightly intertwined. It has been proposed that this is due to ‘cortical recycling’, where numerosity processing takes over circuits originally space. Do such ‘recycled’ retain their original functionality? Here, we investigate interactions between motion direction, two functions both localize parietal cortex. We describe a new phenomenon in which visual direction adapts nonsymbolic perception, giving rise repulsive aftereffect: the left small numbers,...
Recent efforts to chart human brain growth across the lifespan using large-scale MRI data have provided reference standards for development. However, similar models nonhuman primate (NHP) are lacking. The rhesus macaque, a widely used NHP in translational neuroscience due its similarities anatomy, phylogenetics, cognitive, and social behaviors humans, serves as an ideal model. This study aimed create normative charts structure macaque lifespan, enhancing our understanding of neurodevelopment...