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4 results on '"Schellekens, Wouter"'

1. sj-pdf-1-jcb-10.1177_0271678X221133972 - Supplemental material for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth

Author

Schellekens, Wouter, Bhogal, Alex A, Roefs, Emiel CA, Báez-Yáñez, Mario G, Siero, Jeroen CW, and Petridou, Natalia

Subjects
110320 Radiology and Organ Imaging, FOS: Clinical medicine, FOS: Biological sciences, Medicine, Cell Biology, 110305 Emergency Medicine, 110306 Endocrinology, Biochemistry, 69999 Biological Sciences not elsewhere classified, 110904 Neurology and Neuromuscular Diseases, Neuroscience
Abstract

Supplemental material, sj-pdf-1-jcb-10.1177_0271678X221133972 for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth by Wouter Schellekens, Alex A Bhogal, Emiel CA Roefs, Mario G Báez-Yáñez, Jeroen CW Siero, Natalia Petridou in Journal of Cerebral Blood Flow & Metabolism

Published
2022
Full Text
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2. sj-pdf-2-jcb-10.1177_0271678X221133972 - Supplemental material for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth

Author

Schellekens, Wouter, Bhogal, Alex A, Roefs, Emiel CA, Báez-Yáñez, Mario G, Siero, Jeroen CW, and Petridou, Natalia

Subjects
110320 Radiology and Organ Imaging, FOS: Clinical medicine, FOS: Biological sciences, Medicine, Cell Biology, 110305 Emergency Medicine, 110306 Endocrinology, Biochemistry, 69999 Biological Sciences not elsewhere classified, 110904 Neurology and Neuromuscular Diseases, Neuroscience
Abstract

Supplemental material, sj-pdf-2-jcb-10.1177_0271678X221133972 for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth by Wouter Schellekens, Alex A Bhogal, Emiel CA Roefs, Mario G Báez-Yáñez, Jeroen CW Siero, Natalia Petridou in Journal of Cerebral Blood Flow & Metabolism

Published
2022
Full Text
View/download PDF

3. sj-pdf-2-jcb-10.1177_0271678X221133972 - Supplemental material for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth

Author

Schellekens, Wouter, Bhogal, Alex A, Roefs, Emiel CA, Báez-Yáñez, Mario G, Siero, Jeroen CW, and Petridou, Natalia

Subjects
110320 Radiology and Organ Imaging, FOS: Clinical medicine, FOS: Biological sciences, Medicine, Cell Biology, 110305 Emergency Medicine, 110306 Endocrinology, Biochemistry, 69999 Biological Sciences not elsewhere classified, 110904 Neurology and Neuromuscular Diseases, Neuroscience
Abstract

Supplemental material, sj-pdf-2-jcb-10.1177_0271678X221133972 for The many layers of BOLD. The effect of hypercapnic and hyperoxic stimuli on macro- and micro-vascular compartments quantified by CVR, M, and CBV across cortical depth by Wouter Schellekens, Alex A Bhogal, Emiel CA Roefs, Mario G Báez-Yáñez, Jeroen CW Siero, Natalia Petridou in Journal of Cerebral Blood Flow & Metabolism

Published
2022
Full Text
View/download PDF

4. Predictive coding for motion stimuli in human early visual cortex

Author

Schellekens, Wouter, Zaborszky, L., Zilles, K., van Wezel, Richard Jack Anton, Petridou, Natalia, Ramsey, Nick F., and Raemeakers, Mathijs

Subjects
Predictive coding, Leading edge, Histology, genetic structures, Motion suppression, Neuroscience(all), Biophysics, Motion Perception, Stimulus (physiology), Research Support, 050105 experimental psychology, 03 medical and health sciences, High-field fMRI, IR-99505, 0302 clinical medicine, Visual memory, medicine, Journal Article, Humans, 0501 psychology and cognitive sciences, Attention, Motion perception, Visual cortex, Non-U.S. Gov't, Communication, Brain Mapping, medicine.diagnostic_test, business.industry, General Neuroscience, Research Support, Non-U.S. Gov't, 05 social sciences, Magnetic Resonance Imaging, – Visual motion, – Motion suppression, medicine.anatomical_structure, Receptive field, – Visual cortex, – Predictive coding, Anatomy, Functional magnetic resonance imaging, business, Psychology, Neuroscience, N2pc, 030217 neurology & neurosurgery, Photic Stimulation, Visual motion, EWI-27371
Abstract

The current study investigates if early visual cortical areas, V1, V2 and V3, use predictive coding to process motion information. Previous studies have reported biased visual motion responses at locations where novel visual information was presented (i.e., the motion trailing edge), which is plausibly linked to the predictability of visual input. Using high-field functional magnetic resonance imaging (fMRI), we measured brain activation during predictable versus unpreceded motion-induced contrast changes during several motion stimuli. We found that unpreceded moving dots appearing at the trailing edge gave rise to enhanced BOLD responses, whereas predictable moving dots at the leading edge resulted in suppressed BOLD responses. Furthermore, we excluded biases in directional sensitivity, shifts in cortical stimulus representation, visuo-spatial attention and classical receptive field effects as viable alternative explanations. The results clearly indicate the presence of predictive coding mechanisms in early visual cortex for visual motion processing, underlying the construction of stable percepts out of highly dynamic visual input.

Published
2016

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