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Neurosciences
Kyeong-Jin Tark, Min-Suk Kang, Sang Chul Chong, Won Mok Shim
Summary: The study found that the human visual system is able to extract summary statistics from sets of similar items, but the underlying neural mechanism is still poorly understood. The neural representation of ensemble coding is gradually increased in response to the mean orientation of multiple stimuli, especially when the orientations are task-relevant, and can co-exist with task-relevant individual feature representation. It is suggested that the neural representation of ensemble percept is formed by pooling signals at multiple levels of the visual processing stream.
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Neurosciences
Alexia Bourgeois, Virginie Sterpenich, Giannina Rita Iannotti, Patrik Vuilleumier
Summary: The study found that reward cues can selectively modulate the Frontal Eye Field (FEF) during attentional shifts, especially after high-predictive cueing to invalid locations. Reward information also modulated FEF connectivity to superior colliculus, striatum, and visual cortex.
Article
Multidisciplinary Sciences
Antonio Fernandez, Nina M. Hanning, Marisa Carrasco
Summary: This study investigates the causal role of rFEF+ and V1/V2 in endogenous attention using transcranial magnetic stimulation (TMS). The results show that early visual areas do not modulate endogenous attention, while rFEF+ plays a critical role in this process.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Yvonne Li, Nabil Daddaoua, Mattias Horan, Nicholas C. Foley, Jacqueline Gottlieb
Summary: Animals are motivated to obtain information independently of instrumental incentives, driven by a desire to resolve uncertainty and obtain positively-valenced observations. This study reveals that parietal neuronal activity is modulated by both uncertainty and valence, with uncertainty consistently correlating with behavioral sensitivity. The findings suggest distinct neural pathways for uncertainty-driven and valence-driven information demand.
NATURE COMMUNICATIONS
(2022)
Article
Neurosciences
Kristina Drudik, Veronika Zlatkina, Michael Petrides
Summary: This study examined the morphological variability of the superior parietal sulcus (SPS) using MRI scans of the human brain. Two primary morphological patterns were consistently identified, and the extent of the SPS was quantified. The findings provide a foundation for structural and functional analyses within the superior parietal lobule.
Article
Neurosciences
Jena Velji-Ibrahim, J. Douglas Crawford, Luigi Cattaneo, Simona Monaco
Summary: The study used functional MRI and pattern classification methods to investigate how object features are represented during action planning. Results showed that preparatory signals for specific movements modulate object representation in the frontal and parietal cortex, with limited influence in the early visual cortex.
EUROPEAN JOURNAL OF NEUROSCIENCE
(2022)
Article
Anatomy & Morphology
Nico Adelhoefer, Ann-Kathrin Stock, Christian Beste
Summary: The study demonstrated that the effects of cognitive control on conflict monitoring are very specific, especially in cases of response conflicts. The effect is likely driven by activity modulations in the superior frontal areas, including the supplementary motor cortex, and middle frontal areas. Physiological effects of atDCS likely modulate specific aspects of information processing during cognitive control.
BRAIN STRUCTURE & FUNCTION
(2021)
Article
Multidisciplinary Sciences
Olof J. van der Werf, Teresa Schuhmann, Tom de Graaf, Sanne Ten Oever, Alexander T. Sack
Summary: It has been discovered that visuospatial attention operates rhythmically, with a low-frequency 7-8 Hz mechanism coordinating periodic windows of sampling. The relative importance of locations in a visual scene affects the rhythmic sampling process.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Mandy V. V. Bartsch, Christian Merkel, Hendrik Strumpf, Mircea A. Schoenfeld, John K. Tsotsos, Jens-Max Hopf
Summary: This study analyzes the spatiotemporal dynamics of neuromagnetic activity in the human visual cortex during focus shifts. The findings suggest that large focus shifts elicit activity modulations starting from higher hierarchical levels and progressing to lower levels, while smaller shifts start at lower levels. Successive shifts involve backward progressions through the hierarchy. The study concludes that covert focus shifts arise from a cortical coarse-to-fine process, which improves spatial resolution and resolves coding issues.
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
Neurosciences
Kirsten Petras, Sanne ten Oever, Sarang S. Dalal, Valerie Goffaux
Summary: Previous research indicates that the visual system uses redundant information in visual images to facilitate efficient processing, with low spatial frequency information guiding the processing of high spatial frequency detail. The availability of redundant low spatial frequency information is associated with reductions in high spatial frequency representation.
Article
Neurosciences
Hsin-Hung Li, Thomas C. Sprague, Aspen H. Yoo, Wei Ji Ma, Clayton E. Curtis
Summary: The study demonstrates that the human brain represents both the content and uncertainty of visual working memory through probabilistic neural codes, which decode probability distributions over memorized locations.
Article
Neurosciences
Sreenivasan Meyyappan, Abhijit Rajan, George R. Mangun, Mingzhou Ding
Summary: Feature-based visual attention relies on the inferior frontal junction (IFJ) for control, while the debate continues regarding its role in spatial attention control. Functional connectivity between the right IFJ and visual cortex (V4) is associated with subsequent attentional selection of targets and behavioral performance during feature attention, but not during spatial attention.
JOURNAL OF NEUROSCIENCE
(2021)
Article
Multidisciplinary Sciences
Bianca R. Baltaretu, Benjamin T. Dunkley, W. Dale Stevens, J. Douglas Crawford
Summary: This study investigated whether inferior parietal and ventral occipital cortex are involved in transsaccadic processing of different features and found that parietal regions showed task specificity while occipital regions were modulated in a saccade control task. Only occipital cortex showed transsaccadic feature modulations, with significant repetition enhancement in the right cuneus, suggesting a specific role for cuneus in spatial frequency processing during transsaccadic vision.
SCIENTIFIC REPORTS
(2021)
Article
Surgery
Murat Sakir Eksi, Mustafa Guduk, Murat Imre Usseli
Summary: The study found gender differences in skull bone thickness and frontal sinus size, with women having thicker frontal bones and men having larger frontal sinuses.
JOURNAL OF CRANIOFACIAL SURGERY
(2021)
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Neurosciences
Edward F. Ester, Thomas C. Sprague, John T. Serences
Review
Behavioral Sciences
Thomas C. Sprague, Sameer Saproo, John T. Serences
TRENDS IN COGNITIVE SCIENCES
(2015)
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Neurosciences
Jason Samaha, Thomas C. Sprague, Bradley R. Postle
JOURNAL OF COGNITIVE NEUROSCIENCE
(2016)
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Neurosciences
Thomas C. Sprague, Edward F. Ester, John T. Serences
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Neurosciences
Vy A. Vo, Thomas C. Sprague, John T. Serences
JOURNAL OF NEUROSCIENCE
(2017)
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Biochemistry & Molecular Biology
Thomas C. Sprague, Edward F. Ester, John T. Serences
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Neurosciences
Sirawaj Itthipuripat, Javier O. Garcia, Nuttida Rungratsameetaweemana, Thomas C. Sprague, John T. Serences
JOURNAL OF NEUROSCIENCE
(2014)