Effect of repetition on the behavioral and neuronal responses to ambiguous Necker cube images

AbstractA repeated presentation of an item facilitates its subsequent detection or identification, a phenomenon of priming. Priming may involve different types of memory and attention and affects neural activity in various brain regions. Here we instructed participants to report on the orientation of repeatedly presented Necker cubes with high (HA) and low (LA) ambiguity. Manipulating the contrast of internal edges, we varied the ambiguity and orientation of the cube. We tested how both the repeated orientation (referred to as a stimulus factor) and the repeated ambiguity (referred to as a top-down factor) modulated neuronal and behavioral response. On the behavioral level, we observed higher speed and correctness of the response to the HA stimulus following the HA stimulus and a faster response to the right-oriented LA stimulus following the right-oriented stimulus. On the neuronal level, the prestimulus theta-band power grew for the repeated HA stimulus, indicating activation of the neural networks related to attention and uncertainty processing. The repeated HA stimulus enhanced hippocampal activation after stimulus onset. The right-oriented LA stimulus following the right-oriented stimulus enhanced activity in the precuneus and the left frontal gyri before the behavioral response. During the repeated HA stimulus processing, enhanced hippocampal activation may evidence retrieving information to disambiguate the stimulus and define its orientation. Increased activation of the precuneus and the left prefrontal cortex before responding to the right-oriented LA stimulus following the right-oriented stimulus may indicate a match between their orientations. Finally, we observed increased hippocampal activation after responding to the stimuli, reflecting the encoding stimulus features in memory. In line with the large body of works relating the hippocampal activity with episodic memory, we suppose that this type of memory may subserve the priming effect during the repeated presentation of ambiguous images.

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An investigation of resting state functional connectivity of the anterior and posterior Hippocampal subregions in posttraumatic stress disorder and its relationship with symptoms

10.32920/ryerson.14661012.v1 ◽

2021 ◽

Author(s):

Bailee L. Malivoire

Keyword(s):

Posttraumatic Stress Disorder ◽

Functional Connectivity ◽

Posttraumatic Stress ◽

Resting State ◽

Stress Disorder ◽

Brain Regions ◽

Imaging Biomarkers ◽

Resting State Functional Connectivity ◽

Hippocampal Activity ◽

The Right

Posttraumatic stress disorder (PTSD) is associated with abnormal hippocampal activity; however, the functional connectivity (FC) of the hippocampus with other brain regions and its relations with symptoms warrants further attention. I investigated FC of the hippocampus at a subregional level in PTSD during a resting state compared to trauma exposed controls (TECs). Based on imaging literature in PTSD, I targeted the FCs of the hippocampal head and tail subregions with the amygdala, medial prefrontal cortex (mPFC), and the posterior cingulate (PCC). The PTSD group had significantly greater FC compared to the TEC group between the left hippocampal head and the right amygdala, and for the left hippocampal tail with bilateral PCC. Resting state FC predicted symptom severity at time of scan and 4-months post-scan. These results highlight abnormal illness-related FC with both the hippocampal head and tail and provide support for future investigations of imaging biomarkers predictive of disease progression.

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Aprosodia Secondary to Right Hemisphere Damage

Perspectives on Neurophysiology and Neurogenic Speech and Language Disorders ◽

10.1044/nnsld19.3.71 ◽

2009 ◽

Vol 19 (3) ◽

pp. 71-76

Author(s):

Amy D. Rodriguez

Keyword(s):

Quality Of Life ◽

Right Hemisphere ◽

Large Body ◽

Motor Impairment ◽

Brain Regions ◽

Human Communication ◽

Right Hemisphere Damage ◽

Informed Treatment ◽

The Right

Abstract Purpose: This article introduces two types of prosody in human communication; describes right hemisphere contributions to prosody; describes prosodic deficits associated with right hemisphere damage; and discusses prevalence, quality of life, spontaneous recovery, and treatment of aprosodia. Method: Definitions of affective and linguistic prosody and aprosodia are provided. Results of lesion studies and neuroimaging studies are reviewed to inform the reader of the importance of the right hemisphere in prosody expression and comprehension, as well as to describe patterns of prosodic deficits in individuals with right hemisphere damage. Results and Conclusions: There is a large body of evidence supporting the role of the right hemisphere in affective prosody comprehension and production. Specifically, frontal brain regions and the basal ganglia are associated with aprosodia, suggesting there may be an underlying motor impairment. Because aprosodia is enduring and can impact quality of life, it is important to gain a better understanding of this disorder so that clinicians can accurately diagnose prosodic deficits and provide informed treatment.

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An investigation of resting state functional connectivity of the anterior and posterior Hippocampal subregions in posttraumatic stress disorder and its relationship with symptoms

10.32920/ryerson.14661012 ◽

2021 ◽

Author(s):

Bailee L. Malivoire

Keyword(s):

Posttraumatic Stress Disorder ◽

Functional Connectivity ◽

Posttraumatic Stress ◽

Resting State ◽

Stress Disorder ◽

Brain Regions ◽

Imaging Biomarkers ◽

Resting State Functional Connectivity ◽

Hippocampal Activity ◽

The Right

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Emotional Reactivity to Visual Content as Revealed by ERP Component Clustering

Journal of Psychophysiology ◽

10.1027/0269-8803/a000145 ◽

2015 ◽

Vol 29 (4) ◽

pp. 135-146 ◽

Cited By ~ 3

Author(s):

Miroslaw Wyczesany ◽

Szczepan J. Grzybowski ◽

Jan Kaiser

Keyword(s):

Emotional Reactivity ◽

Brain Activity ◽

Affective State ◽

Occipital Lobe ◽

Stimulus Onset ◽

Emotional States ◽

Neural Basis ◽

Temporoparietal Junction ◽

The Right ◽

The Impact

Abstract. In the study, the neural basis of emotional reactivity was investigated. Reactivity was operationalized as the impact of emotional pictures on the self-reported ongoing affective state. It was used to divide the subjects into high- and low-responders groups. Independent sources of brain activity were identified, localized with the DIPFIT method, and clustered across subjects to analyse the visual evoked potentials to affective pictures. Four of the identified clusters revealed effects of reactivity. The earliest two started about 120 ms from the stimulus onset and were located in the occipital lobe and the right temporoparietal junction. Another two with a latency of 200 ms were found in the orbitofrontal and the right dorsolateral cortices. Additionally, differences in pre-stimulus alpha level over the visual cortex were observed between the groups. The attentional modulation of perceptual processes is proposed as an early source of emotional reactivity, which forms an automatic mechanism of affective control. The role of top-down processes in affective appraisal and, finally, the experience of ongoing emotional states is also discussed.

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Neural Underpinnings of Numerical and Spatial Cognition: An fMRI Meta-Analysis of Brain Regions Associated with Symbolic Number, Arithmetic, and Mental Rotation

10.31234/osf.io/dyqrx ◽

2019 ◽

Author(s):

Zachary Hawes ◽

H Moriah Sokolowski ◽

Chuka Bosah Ononye ◽

Daniel Ansari

Keyword(s):

Mental Rotation ◽

Parietal Lobe ◽

Meta Analysis ◽

Likelihood Estimation ◽

Brain Regions ◽

Angular Gyrus ◽

Number Representation ◽

Neural Underpinnings ◽

The Right ◽

Symbolic Number

Where and under what conditions do spatial and numerical skills converge and diverge in the brain? To address this question, we conducted a meta-analysis of brain regions associated with basic symbolic number processing, arithmetic, and mental rotation. We used Activation Likelihood Estimation (ALE) to construct quantitative meta-analytic maps synthesizing results from 86 neuroimaging papers (~ 30 studies/cognitive process). All three cognitive processes were found to activate bilateral parietal regions in and around the intraparietal sulcus (IPS); a finding consistent with shared processing accounts. Numerical and arithmetic processing were associated with overlap in the left angular gyrus, whereas mental rotation and arithmetic both showed activity in the middle frontal gyri. These patterns suggest regions of cortex potentially more specialized for symbolic number representation and domain-general mental manipulation, respectively. Additionally, arithmetic was associated with unique activity throughout the fronto-parietal network and mental rotation was associated with unique activity in the right superior parietal lobe. Overall, these results provide new insights into the intersection of numerical and spatial thought in the human brain.

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CYBERCHONDRIA INFORMATION CLINIC: Internet's Impact on your Health (Preprint)

10.2196/preprints.14507 ◽

2019 ◽

Author(s):

Valentina Escotet Espinoza

Keyword(s):

Human Life ◽

Brain Regions ◽

Physical Symptoms ◽

Digital Design ◽

Somatization Disorder ◽

The Internet ◽

Cultural Aspects ◽

Starting Point ◽

The Right ◽

The Relationship

UNSTRUCTURED Over half of Americans report looking up health-related questions on the internet, including questions regarding their own ailments. The internet, in its vastness of information, provides a platform for patients to understand how to seek help and understand their condition. In most cases, this search for knowledge serves as a starting point to gather evidence that leads to a doctor’s appointment. However, in some cases, the person looking for information ends up tangled in an information web that perpetuates anxiety and further searches, without leading to a doctor’s appointment. The Internet can provide helpful and useful information; however, it can also be a tool for self-misdiagnosis. Said person craves the instant gratification the Internet provides when ‘googling’ – something one does not receive when having to wait for a doctor’s appointment or test results. Nevertheless, the Internet gives that instant response we demand in those moments of desperation. Cyberchondria, a term that has entered the medical lexicon in the 21st century after the advent of the internet, refers to the unfounded escalation of people’s concerns about their symptomatology based on search results and literature online. ‘Cyberchondriacs’ experience mistrust of medical experts, compulsion, reassurance seeking, and excessiveness. Their excessive online research about health can also be associated with unnecessary medical expenses, which primarily arise from anxiety, increased psychological distress, and worry. This vicious cycle of searching information and trying to explain current ailments derives into a quest for associating symptoms to diseases and further experiencing the other symptoms of said disease. This psychiatric disorder, known as somatization, was first introduced to the DSM-III in the 1980s. Somatization is a psycho-biological disorder where physical symptoms occur without any palpable organic cause. It is a disorder that has been renamed, discounted, and misdiagnosed from the beginning of the DSMs. Somatization triggers span many mental, emotional, and cultural aspects of human life. Our environment and social experiences can lay the blueprint for disorders to develop over time; an idea that is widely accepted for underlying psychiatric disorders such as depression and anxiety. The research is going in the right direction by exploring brain regions but needs to be expanded on from a sociocultural perspective. In this work, we explore the relationship between somatization disorder and the condition known as cyberchondria. First, we provide a background on each of the disorders, including their history and psychological perspective. Second, we proceed to explain the relationship between the two disorders, followed by a discussion on how this relationship has been studied in the scientific literature. Thirdly, we explain the problem that the relationship between these two disorders creates in society. Lastly, we propose a set of intervention aids and helpful resource prototypes that aim at resolving the problem. The proposed solutions ranged from a site-specific clinic teaching about cyberchondria to a digital design-coded chrome extension available to the public.

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Growth of prefrontal and limbic brain regions and anxiety disorders in children born very preterm

Psychological Medicine ◽

10.1017/s0033291721002105 ◽

2021 ◽

pp. 1-12

Author(s):

Courtney P. Gilchrist ◽

Deanne K. Thompson ◽

Bonnie Alexander ◽

Claire E. Kelly ◽

Karli Treyvaud ◽

...

Keyword(s):

Anxiety Disorder ◽

Anxiety Disorders ◽

Orbitofrontal Cortex ◽

Developmental Trajectories ◽

Brain Regions ◽

Social Risk ◽

Intracranial Volume ◽

Total Brain Volume ◽

Very Preterm ◽

The Right

Abstract Background Children born very preterm (VP) display altered growth in corticolimbic structures compared with full-term peers. Given the association between the cortiocolimbic system and anxiety, this study aimed to compare developmental trajectories of corticolimbic regions in VP children with and without anxiety diagnosis at 13 years. Methods MRI data from 124 VP children were used to calculate whole brain and corticolimbic region volumes at term-equivalent age (TEA), 7 and 13 years. The presence of an anxiety disorder was assessed at 13 years using a structured clinical interview. Results VP children who met criteria for an anxiety disorder at 13 years (n = 16) displayed altered trajectories for intracranial volume (ICV, p < 0.0001), total brain volume (TBV, p = 0.029), the right amygdala (p = 0.0009) and left hippocampus (p = 0.029) compared with VP children without anxiety (n = 108), with trends in the right hippocampus (p = 0.062) and left medial orbitofrontal cortex (p = 0.079). Altered trajectories predominantly reflected slower growth in early childhood (0–7 years) for ICV (β = −0.461, p = 0.020), TBV (β = −0.503, p = 0.021), left (β = −0.518, p = 0.020) and right hippocampi (β = −0.469, p = 0.020) and left medial orbitofrontal cortex (β = −0.761, p = 0.020) and did not persist after adjusting for TBV and social risk. Conclusions Region- and time-specific alterations in the development of the corticolimbic system in children born VP may help to explain an increase in anxiety disorders observed in this population.

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Metacognition: ideas and insights from neuro- and educational sciences

npj Science of Learning ◽

10.1038/s41539-021-00089-5 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

Damien S. Fleur ◽

Bert Bredeweg ◽

Wouter van den Bos

Keyword(s):

Cognitive Neuroscience ◽

Large Body ◽

Brain Regions ◽

Metacognitive Knowledge ◽

Future Research ◽

Metacognitive Control ◽

Domain Generality ◽

Entry Points ◽

Control Research ◽

Educational Sciences

AbstractMetacognition comprises both the ability to be aware of one’s cognitive processes (metacognitive knowledge) and to regulate them (metacognitive control). Research in educational sciences has amassed a large body of evidence on the importance of metacognition in learning and academic achievement. More recently, metacognition has been studied from experimental and cognitive neuroscience perspectives. This research has started to identify brain regions that encode metacognitive processes. However, the educational and neuroscience disciplines have largely developed separately with little exchange and communication. In this article, we review the literature on metacognition in educational and cognitive neuroscience and identify entry points for synthesis. We argue that to improve our understanding of metacognition, future research needs to (i) investigate the degree to which different protocols relate to the similar or different metacognitive constructs and processes, (ii) implement experiments to identify neural substrates necessary for metacognition based on protocols used in educational sciences, (iii) study the effects of training metacognitive knowledge in the brain, and (iv) perform developmental research in the metacognitive brain and compare it with the existing developmental literature from educational sciences regarding the domain-generality of metacognition.

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Functional network topology of the right insula affects emotion dysregulation in hyperactive-impulsive attention-deficit/hyperactivity disorder

Scientific Reports ◽

10.1038/s41598-021-94426-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Tammo Viering ◽

Pieter J. Hoekstra ◽

Alexandra Philipsen ◽

Jilly Naaijen ◽

Andrea Dietrich ◽

...

Keyword(s):

Attention Deficit Hyperactivity Disorder ◽

Network Topology ◽

Resting State ◽

Latent Variable ◽

Emotion Dysregulation ◽

Adult Adhd ◽

Brain Regions ◽

Graph Analysis ◽

Hyperactivity Disorder ◽

The Right

AbstractEmotion dysregulation is common in attention-deficit/hyperactivity disorder (ADHD). It is highly prevalent in young adult ADHD and related to reduced well-being and social impairments. Neuroimaging studies reported neural activity changes in ADHD in brain regions associated with emotion processing and regulation. It is however unknown whether deficits in emotion regulation relate to changes in functional brain network topology in these regions. We used a combination of graph analysis and structural equation modelling (SEM) to analyze resting-state functional connectivity in 147 well-characterized young adults with ADHD and age-matched healthy controls from the NeuroIMAGE database. Emotion dysregulation was gauged with four scales obtained from questionnaires and operationalized through a latent variable derived from SEM. Graph analysis was applied to resting-state data and network topology measures were entered into SEM models to identify brain regions whose local network integration and connectedness differed between subjects and was associated with emotion dysregulation. The latent variable of emotion dysregulation was characterized by scales gauging emotional distress, emotional symptoms, conduct symptoms, and emotional lability. In individuals with ADHD characterized by prominent hyperactivity-impulsivity, the latent emotion dysregulation variable was related to an increased clustering and local efficiency of the right insula. Thus, in the presence of hyperactivity-impulsivity, clustered network formation of the right insula may underpin emotion dysregulation in young adult ADHD.

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A Connectome-Wide Functional Signature of Trait Anger

Clinical Psychological Science ◽

10.1177/21677026211030240 ◽

2021 ◽

pp. 216770262110302

Author(s):

M. Justin Kim ◽

Maxwell L. Elliott ◽

Annchen R. Knodt ◽

Ahmad R. Hariri

Keyword(s):

Functional Connectivity ◽

Visual Information ◽

Past Research ◽

Brain Regions ◽

Small Sample ◽

Trait Anger ◽

Frontal Pole ◽

Brain Correlates ◽

Small Sample Sizes ◽

The Right

Past research on the brain correlates of trait anger has been limited by small sample sizes, a focus on relatively few regions of interest, and poor test–retest reliability of functional brain measures. To address these limitations, we conducted a data-driven analysis of variability in connectome-wide functional connectivity in a sample of 1,048 young adult volunteers. Multidimensional matrix regression analysis showed that self-reported trait anger maps onto variability in the whole-brain functional connectivity patterns of three brain regions that serve action-related functions: bilateral supplementary motor areas and the right lateral frontal pole. We then demonstrate that trait anger modulates the functional connectivity of these regions with canonical brain networks supporting somatomotor, affective, self-referential, and visual information processes. Our findings offer novel neuroimaging evidence for interpreting trait anger as a greater propensity to provoked action, which supports ongoing efforts to understand its utility as a potential transdiagnostic marker for disordered states characterized by aggressive behavior.

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