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Meyyappan S, Rajan A, Mangun GR, Ding M. Top-down control of the left visual field bias in cued visual spatial attention. Cereb Cortex 2023; 33:5097-5107. [PMID: 36245213 PMCID: PMC10151882 DOI: 10.1093/cercor/bhac402] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 11/13/2022] Open
Abstract
A left visual field (LVF) bias in perceptual judgments, response speed, and discrimination accuracy has been reported in humans. Cognitive factors, such as visual spatial attention, are known to modulate or even eliminate this bias. We investigated this problem by recording pupillometry together with functional magnetic resonance imaging (fMRI) in a cued visual spatial attention task. We observed that (i) the pupil was significantly more dilated following attend-right than attend-left cues, (ii) the task performance (e.g. reaction time [RT]) did not differ between attend-left and attend-right trials, and (iii) the difference in cue-related pupil dilation between attend-left and attend-right trials was inversely related to the corresponding difference in RT. Neuroscientically, correlating the difference in cue-related pupil dilation with the corresponding cue-related fMRI difference yielded activations primarily in the right hemisphere, including the right intraparietal sulcus and the right ventrolateral prefrontal cortex. These results suggest that (i) there is an asymmetry in visual spatial attention control, with the rightward attention control being more effortful than the leftward attention control, (ii) this asymmetry underlies the reduction or the elimination of the LVF bias, and (iii) the components of the attentional control networks in the right hemisphere are likely part of the neural substrate of the observed asymmetry in attentional control.
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Affiliation(s)
- Sreenivasan Meyyappan
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
- Center for Mind and Brain, University of California, Davis, CA 95618, USA
| | - Abhijit Rajan
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - George R Mangun
- Center for Mind and Brain, University of California, Davis, CA 95618, USA
- Departments of Psychology and Neurology, University of California, Davis, CA 95616, USA
| | - Mingzhou Ding
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
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2
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Zhao T, Zhang C, Zhong S, Chen Q, Liu S, Jiao W, Liu W, Huang L, Zhang Y, Zhang Y. Synergistic alleviation effects of anchovy hydrolysates-catechin on scopolamine-induced mice memory deficits: the exploration of the potential relationship among gut-brain-axis. Food Funct 2022; 13:1563-1578. [PMID: 35072201 DOI: 10.1039/d1fo02195h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Anchovy protein hydrolysates (APH) and catechin (CA) have proved to be effective in memory improvement. However, the enhancing effects of APH-CA conjugates on the memory are little investigated. The underlying mechanism and synergic effects remain unclear. Herein, relationships among memory enhancement, gut microbiota, fecal metabolites, and neurotransmitters of mice regulated by APH-CA were investigated. APH, APH-CA, and CA decreased MDA, IL-1β, and TNF-α in liver, altered levels of GPx, LDH, IL-1β, and TNF-α in serum, re-structured gut microbiota, regulated fecal metabolites, and regulated neurotransmitters in the brain. The alleviation effects of APH-CA were partially better than those of APH and CA. The 16s rRNA results illustrated that Bacteroidetes and Firmicutes were altered. Notably, memory-related metabolites and neurotransmitters were significantly up-regulated by the administration of samples. Moreover, possible connections are observed among the gut microbiota, fecal metabolites, and brain neurotransmitters. Together, the regulation of the microbiota-metabolites-brain-neurotransmitters axis may be one of the mechanisms for APH-CA against scopolamine-induced cognitive deficits. In addition, the synergic effects of APH and CA were partially confirmed.
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Affiliation(s)
- Tiantian Zhao
- Sericulture & Agri-food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China. .,College of Food Science and Technology, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Ocean University, Zhanjiang, China
| | - Chen Zhang
- Guangzhou Aibaiyi Biotechnology Co., Ltd, Guangzhou 51140, China
| | - Saiyi Zhong
- College of Food Science and Technology, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Ocean University, Zhanjiang, China
| | - Qirong Chen
- Guangzhou Aibaiyi Biotechnology Co., Ltd, Guangzhou 51140, China
| | - Shuo Liu
- Guangzhou Aibaiyi Biotechnology Co., Ltd, Guangzhou 51140, China
| | - Wenjuan Jiao
- Sericulture & Agri-food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
| | - Weifeng Liu
- Sericulture & Agri-food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
| | - Lihua Huang
- Department of Food, Guangzhou City Polytechnic, Guangzhou 510405, China
| | - Yehui Zhang
- Sericulture & Agri-food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
| | - Yousheng Zhang
- Sericulture & Agri-food Research Institute Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
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Sanchez-Lopez J, Savazzi S, Pedersini CA, Cardobi N, Marzi CA. Neural bases of unconscious orienting of attention in hemianopic patients: Hemispheric differences. Cortex 2020; 127:269-289. [PMID: 32251902 DOI: 10.1016/j.cortex.2020.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 10/25/2019] [Accepted: 02/26/2020] [Indexed: 12/28/2022]
Abstract
The aim of this research was to study the behavioral and neurophysiological correlates of visual attention orientation to unseen stimuli presented to the blind hemifield of hemianopic patients, and the existence of hemispheric differences for this kind of unconscious attention. Behaviorally, by using a Posner paradigm, we found a significant attention effect in speed of response to unseen stimuli similar to that observed in the sighted hemifield and in healthy participants for visible stimuli. Moreover, event-related potential (ERP) and oscillatory attention-related activity were present following stimulus presentation to the blind hemifield. Importantly, in patients this pattern of activity was different as a function of the side of the brain lesion: Left damaged patients showed attention-related ERP and oscillatory activity broadly similar to that found in healthy participants. In contrast, right damaged patients showed a radically different pattern. These data confirm and extend to neurophysiological mechanisms the existence of unconscious visual orienting and are in keeping with a right hemisphere dominance for both unconscious and conscious attention.
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Affiliation(s)
- Javier Sanchez-Lopez
- Psychology and Physiology Section, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
| | - Silvia Savazzi
- Psychology and Physiology Section, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy; Perception and Awareness (PandA) Laboratory, University of Verona, Verona, Italy; National Institute of Neuroscience, Verona, Italy.
| | - Caterina A Pedersini
- Psychology and Physiology Section, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
| | - Nicolò Cardobi
- Psychology and Physiology Section, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
| | - Carlo A Marzi
- Psychology and Physiology Section, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy; National Institute of Neuroscience, Verona, Italy.
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4
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Verleger R, Śmigasiewicz K, Michael L, Heikaus L, Niedeggen M. Get Set or Get Distracted? Disentangling Content-Priming and Attention-Catching Effects of Background Lure Stimuli on Identifying Targets in Two Simultaneously Presented Series. Brain Sci 2019; 9:brainsci9120365. [PMID: 31835694 PMCID: PMC6955916 DOI: 10.3390/brainsci9120365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/05/2019] [Accepted: 12/09/2019] [Indexed: 11/27/2022] Open
Abstract
In order to study the changing relevance of stimulus features in time and space, we used a task with rapid serial presentation of two stimulus streams where two targets (“T1” and “T2”) had to be distinguished from background stimuli and where the difficult T2 distinction was impeded by background stimuli presented before T1 that resemble T2 (“lures”). Such lures might actually have dual characteristics: Their capturing attention might interfere with target identification, whereas their similarity to T2 might result in positive priming. To test this idea here, T2 was a blue digit among black letters, and lures resembled T2 either by alphanumeric category (black digits) or by salience (blue letters). Same-category lures were expected to prime T2 identification whereas salient lures would impede T2 identification. Results confirmed these predictions, yet the precise pattern of results did not fit our conceptual framework. To account for this pattern, we speculate that lures serve to confuse participants about the order of events, and the major factor distinguishing color lures and digit lures is their confusability with T2. Mechanisms of effects were additionally explored by measuring event-related EEG potentials. Consistent with the assumption that they attract more attention, color lures evoked larger N2pc than digit lures and affected the ensuing T1-evoked N2pc. T2-evoked N2pc was indistinguishably reduced by all kinds of preceding lures, though. Lure-evoked mesio-frontal negativity increased from first to third lures both with digit and color lures and, thereby, might have reflected expectancy for T1.
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Affiliation(s)
- Rolf Verleger
- Department of Neurology, University of Lübeck, 23538 Lübeck, Germany; (K.Ś.); (L.H.)
- Institute of Psychology II, University of Lübeck, 23538 Lübeck, Germany
- Correspondence:
| | - Kamila Śmigasiewicz
- Department of Neurology, University of Lübeck, 23538 Lübeck, Germany; (K.Ś.); (L.H.)
- Laboratoire de Neurosciences Cognitives, Aix-Marseille Université, CNRS, 13331 Marseille, France
| | - Lars Michael
- Department of Psychology, Medical School Berlin, 12247 Berlin, Germany;
| | - Laura Heikaus
- Department of Neurology, University of Lübeck, 23538 Lübeck, Germany; (K.Ś.); (L.H.)
| | - Michael Niedeggen
- Department of Pedagogy and Psychology, Free University of Berlin, 14195 Berlin, Germany;
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Śmigasiewicz K, Wondany K, Verleger R. Left-Hemisphere Delay of EEG Potentials Evoked by Standard Letter Stimuli During Rapid Serial Visual Presentation: Indicating Right-Hemisphere Advantage or Left-Hemisphere Load? Front Psychol 2019; 10:171. [PMID: 30778322 PMCID: PMC6369358 DOI: 10.3389/fpsyg.2019.00171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/18/2019] [Indexed: 11/13/2022] Open
Abstract
During rapid serial visual presentation (RSVP), two streams of letters simultaneously presented in the left and right visual fields (LVF and RVF) evoke visual potentials (VEPs) of EEG a few milliseconds earlier at the right (RH) than the left hemisphere (LH). This small LH VEP lag might be attributed to a RH advantage in initial processing of rapidly changing stimuli or to larger load of the LH by its specialized processing of letters from both visual fields simultaneously. In the present study, the two-stream condition was compared in two experiments to conditions with smaller instantaneous verbal load, namely with stimuli presented either solely or slightly earlier in the LVF or RVF. The RH advantage hypothesis predicts a LH VEP lag very similar to the standard two-stream condition when comparing between LH and RH VEPs contralateral to the single or earlier stream. The LH load hypothesis predicts shorter VEP latencies at the LH in the one-stream and earlier-stream than in the two-stream condition, resulting in an absent LH lag in those conditions. Results tended to be more in line with these latter predictions suggesting that in RSVP the LH might be more involved in partial processing of letters in search for target features. However, since the RH advantage hypothesis could not be reliably rejected these results might indicate a complex interplay between both hemispheres. This interplay would exploit the abilities of either hemisphere during the demanding processing of rapidly presented letters, both the LH advantage in letter processing and the RH advantage in visual perception at initial stages.
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Affiliation(s)
- Kamila Śmigasiewicz
- Department of Neurology, University of Lübeck, Lübeck, Germany.,Laboratoire de Neurosciences Cognitives, CNRS, Aix-Marseille Université, Marseille, France
| | - Kenneth Wondany
- Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Rolf Verleger
- Department of Neurology, University of Lübeck, Lübeck, Germany.,Institute of Psychology II, University of Lübeck, Lübeck, Germany
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Non-singleton colors are not attended faster than categories, but they are encoded faster: A combined approach of behavior, modeling and ERPs. Vision Res 2017; 140:106-119. [DOI: 10.1016/j.visres.2017.06.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 06/05/2017] [Accepted: 06/08/2017] [Indexed: 11/22/2022]
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Asanowicz D, Kruse L, Śmigasiewicz K, Verleger R. Lateralization of spatial rather than temporal attention underlies the left hemifield advantage in rapid serial visual presentation. Brain Cogn 2017; 118:54-62. [PMID: 28797898 DOI: 10.1016/j.bandc.2017.07.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/25/2017] [Accepted: 07/31/2017] [Indexed: 10/19/2022]
Abstract
In bilateral rapid serial visual presentation (RSVP), the second of two targets, T1 and T2, is better identified in the left visual field (LVF) than in the right visual field (RVF). This LVF advantage may reflect hemispheric asymmetry in temporal attention or/and in spatial orienting of attention. Participants performed two tasks: the "standard" bilateral RSVP task (Exp.1) and its unilateral variant (Exp.1 & 2). In the bilateral task, spatial location was uncertain, thus target identification involved stimulus-driven spatial orienting. In the unilateral task, the targets were presented block-wise in the LVF or RVF only, such that no spatial orienting was needed for target identification. Temporal attention was manipulated in both tasks by varying the T1-T2 lag. The results showed that the LVF advantage disappeared when involvement of stimulus-driven spatial orienting was eliminated, whereas the manipulation of temporal attention had no effect on the asymmetry. In conclusion, the results do not support the hypothesis of hemispheric asymmetry in temporal attention, and provide further evidence that the LVF advantage reflects right hemisphere predominance in stimulus-driven orienting of spatial attention. These conclusions fit evidence that temporal attention is implemented by bilateral parietal areas and spatial attention by the right-lateralized ventral frontoparietal network.
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Affiliation(s)
- Dariusz Asanowicz
- Institute of Psychology, Jagiellonian University in Kraków, Poland; Department of Neurology, University of Lübeck, Germany.
| | - Lena Kruse
- Department of Neurology, University of Lübeck, Germany
| | | | - Rolf Verleger
- Department of Neurology, University of Lübeck, Germany; Institute of Psychology II, University of Lübeck, Germany
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8
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How handedness influences perceptual and attentional processes during rapid serial visual presentation. Neuropsychologia 2017; 100:155-163. [DOI: 10.1016/j.neuropsychologia.2017.04.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 01/10/2023]
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Asanowicz D, Verleger R, Kruse L, Beier K, Śmigasiewicz K. A right hemisphere advantage at early cortical stages of processing alphanumeric stimuli. Evidence from electrophysiology. Brain Cogn 2017; 113:40-55. [DOI: 10.1016/j.bandc.2017.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 01/10/2017] [Accepted: 01/11/2017] [Indexed: 11/30/2022]
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10
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Leftward bias in orienting to and disengaging attention from salient task-irrelevant events in rapid serial visual presentation. Neuropsychologia 2017; 94:96-105. [DOI: 10.1016/j.neuropsychologia.2016.11.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 11/30/2016] [Accepted: 11/30/2016] [Indexed: 11/24/2022]
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