Article
Neurosciences
S. Schintu, D. J. Kravitz, E. H. Silson, C. A. Cunningham, E. M. Wassermann, S. Shomstein
Summary: Recent studies using fMRI pRF mapping have provided evidence that retinotopic organization extends from the primary visual cortex to ventral and dorsal visual pathways. Attentional deployment modulates visuospatial representation in the posterior parietal cortex (PPC), and the flexibility of spatial representation in the PPC contributes to visuospatial learning. This study demonstrates that prism adaptation (PA) drives a dynamic reorganization of response profiles in the PPC, indicating that spatial representations in the PPC can dynamically change in response to external factors.
Article
Neurosciences
Koorosh Mirpour, James W. Bisley
Summary: The lateral intraparietal area (LIP) provides a stable map integrating task rules and stimulus identity, while the frontal eye field (FEF) is consistently modulated by more complex information but integrates all information just before the saccade to make the final decision on where to move the eye.
JOURNAL OF NEUROPHYSIOLOGY
(2021)
Article
Neurosciences
Darlene R. Archer, Henry J. Alitto, W. Martin Usrey
Summary: Stimulus contrast affects spatial integration in the lateral geniculate nucleus, resulting in reduced extraclassical surround suppression and larger preferred stimulus size with low-contrast stimuli. Effects are more pronounced in magnocellular neurons, suggesting stream-specific interactions between stimulus contrast and size. Contrast-dependent effects are comparable in ON-center and OFF-center neurons within the magnocellular pathway, indicating differential interactions between stimulus contrast and size to improve stimulus detection and discrimination under pathway-specific contrast conditions.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Multidisciplinary Sciences
Bin Zhao, Rong Wang, Zhihua Zhu, Qianli Yang, Aihua Chen
Summary: The macaque Visual Posterior Sylvian (VPS) area contains neurons that selectively respond to heading direction in both visual and vestibular modalities. However, it is unclear how these neurons combine the two sensory signals. Unlike the medial superior temporal area (MSTd), which shows subadditive characteristics, VPS responses are dominated by vestibular signals. Information analysis reveals that VPS encodes information from distinct sensory modalities, similar to MSTd, but with more emphasis on vestibular signals. Single neuron responses in both areas can be well explained by a weighted linear sum of unimodal responses. Additionally, normalization models capture the interaction characteristics between vestibular and visual signals in both VPS and MSTd, indicating the presence of divisive normalization mechanism in the cortex.
Review
Neurosciences
Celia Foster, Wei-An Sheng, Tobias Heed, Suliann Ben Hamed
Summary: The paper reviews the important role of macaque VIP in sensorimotor and cognitive functions and integrates human studies, revealing three homologous structures of human VIP that are different in functionality from macaque VIP.
PROGRESS IN NEUROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Paolo Papale, Feng Wang, A. Tyler Morgan, Xing Chen, Amparo Gilhuis, Lucy S. Petro, Lars Muckli, Pieter R. Roelfsema, Matthew W. Self
Summary: This study reveals that contextual information has a rapid and selective impact on neuronal activity in the V1 region of the brain, it can be used to decode scenes and can be predicted from feedforward input. Additionally, the structure of V1 representations measured with electrophysiology in monkeys correlates strongly with the representations measured with fMRI in humans.
Article
Multidisciplinary Sciences
Feng Ni, Junnian Wang, Jialin Tang, Wenjun Yu, Ruihan Xu
Summary: In this paper, an improved lightweight convolutional neural network is constructed based on the feature fusion network for side-channel analysis. The experimental results show that the new network has faster convergence, better robustness, and higher accuracy. Compared with traditional neural network methods, it has higher heat value and more concentration in the key interval.
Article
Neurosciences
Jakob C. B. Schwenk, Steffen Klingenhoefer, Bjoern-Olaf Werner, Stefan Dowiasch, Frank Bremmer
Summary: The accurate processing of temporal information in the area V4 around the time of saccadic eye movements indicates a potential correlation between eye movements and misperceptions of time. The precise representation of time intervals and the modulation of relative response amplitudes during saccades introduce new insights into the neural mechanisms underlying temporal perception.
JOURNAL OF NEUROPHYSIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Akshatha Bhat, Jan W. Kurzawski, Giovanni Anobile, Francesca Tinelli, Laura Biagi, Maria Concetta Morrone
Summary: A case study of patient IB with left eye microphthalmia and lesions in most of the left geniculostriate pathway is presented. Despite severe lesions, the patient only experiences a narrow scotoma in the peripheral part of the lower-right-hemifield.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Joshua A. Seideman, Terrence R. Stanford, Emilio Salinas
Summary: The study shows that spatial selection in LIP is distinct from, and may even conflict with, evidence accumulation during saccadic choices. This finding is important for understanding the guidance mechanisms of eye movements.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Julian Freedland, Fred Rieke
Summary: This study investigates the key spatial features in natural scenes that shape the encoding of primate parasol RGCs, and validates the findings through simplified stimuli and modeling.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Tomas Knapen
Summary: The study reveals that the human visual system is not only limited to traditional visual regions, but also includes the default-mode network and hippocampus. Visual-spatial representations are influenced by cognitive states, and the visual roles between different brain regions connect abstract memories and sensory impressions in the brain.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Neurosciences
Garikoitz Lerma-Usabiaga, Jonathan Winawer, Brian A. Wandell
Summary: The study investigates accurate estimation of the RF of neuronal populations and its shape, finding that elliptical pRFs are common in the early visual cortex. Researchers also found discrepancies in estimation results using different software packages.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Multidisciplinary Sciences
Janis Intoy, Naghmeh Mostofi, Michele Rucci
Summary: Humans use rapid eye movements (saccades) to inspect stimuli with the foveola, the region of the retina where receptors are most densely packed. It is well established that visual sensitivity is generally attenuated during these movements, a phenomenon known as saccadic suppression. This study measured the foveal dynamics of saccadic suppression during a naturalistic high-acuity task, revealing that contrast sensitivity is not uniform across the foveola, and suppression varies within the foveola. These results shed light on the modulations experienced by foveal vision during the saccade-fixation cycle.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Cell Biology
Yin Yang, Ke Chen, Marcello G. P. Rosa, Hsin-Hao Yu, Li-Rong Kuang, Jie Yang
Summary: Physiological characteristics of marmoset V2 neurons are similar to V1 neurons, with orientation selectivity and separable spatial/temporal frequency curves playing important roles in visual processing.
NEURAL REGENERATION RESEARCH
(2021)
Article
Computer Science, Artificial Intelligence
C. C. Alan Fung, S. -i. Amari
NEURAL COMPUTATION
(2015)
Article
Physics, Fluids & Plasmas
C. C. Alan Fung, K. Y. Michael Wong, Hongzi Mao, Si Wu
Article
Physics, Fluids & Plasmas
He Wang, Kin Lam, C. C. Alan Fung, K. Y. Michael Wong, Si Wu
Article
Multidisciplinary Sciences
D. Miyamoto, D. Hirai, C. C. A. Fung, A. Inutsuka, M. Odagawa, T. Suzuki, R. Boehringer, C. Adaikkan, C. Matsubara, N. Matsuki, T. Fukai, T. J. McHugh, A. Yamanaka, M. Murayama
Article
Physics, Multidisciplinary
C. C. Alan Fung, K. Y. Michael Wong, Si Wu
Article
Computer Science, Artificial Intelligence
C. C. Alan Fung, K. Y. Michael Wong, Si Wu
NEURAL COMPUTATION
(2010)
Article
Computer Science, Artificial Intelligence
C. C. Alan Fung, K. Y. Michael Wong, He Wang, Si Wu
NEURAL COMPUTATION
(2012)
Article
Mathematical & Computational Biology
C. C. Alan Fung, He Wang, Kin Lam, K. Y. Michael Wong, Si Wu
FRONTIERS IN COMPUTATIONAL NEUROSCIENCE
(2013)
Article
Multidisciplinary Sciences
Chi Chung Alan Fung, Tomoki Fukai
SCIENTIFIC REPORTS
(2018)
Article
Multidisciplinary Sciences
Khaled Ghandour, Noriaki Ohkawa, Chi Chung Alan Fung, Hirotaka Asai, Yoshito Saitoh, Takashi Takekawa, Reiko Okubo-Suzuki, Shingo Soya, Hirofumi Nishizono, Mina Matsuo, Makoto Osanai, Masaaki Sato, Masamichi Ohkura, Junichi Nakai, Yasunori Hayashi, Takeshi Sakurai, Takashi Kitamura, Tomoki Fukai, Kaoru Inokuchi
NATURE COMMUNICATIONS
(2019)