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Lucherini Angeletti L, Scalabrini A, Ricca V, Northoff G. Topography of the Anxious Self: Abnormal Rest-Task Modulation in Social Anxiety Disorder. Neuroscientist 2023; 29:221-244. [PMID: 34282680 DOI: 10.1177/10738584211030497] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Social anxiety disorder (SAD) is characterized by social anxiety/fear, self-attention, and interoception. Functional magnetic resonance imaging studies demonstrate increased activity during symptom-sensitive tasks in regions of the default-mode network (DMN), amygdala (AMG), and salience network (SN). What is the source of this task-unspecific symptom-sensitive hyperactivity in DMN? We address this question by probing SAD resting state (rs) changes in DMN including their relation to other regions as possible source of task-unspecific hyperactivity in the same regions. Our findings show the following: (1) rs-hypoconnectivity within-DMN regions; (2) rs-hyperconnectivity between DMN and AMG/SN; (3) task-evoked hyperactivity in the abnormal rs-regions of DMN and AMG/SN during different symptom-sensitive tasks; (4) negative relationship of rest and task changes in especially anterior DMN regions as their rs-hypoconnectivity is accompanied by task-unspecific hyperactivity; (5) abnormal top-down/bottom-up modulation between anterior DMN regions and AMG during rest and task. Findings demonstrate that rs-hypoconnectivity among DMN regions is negatively related to task-unspecific hyperactivity in DMN and AMG/SN. We propose a model of "Topography of the Anxious Self" in SAD (TAS-SAD). Abnormal DMN-AMG/SN topography during rest, as trait feature of an "unstable social self", is abnormally aggravated during SAD-sensitive situations resulting in task-related hyperactivity in the same regions with an "anxious self" as state feature.
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Affiliation(s)
| | - Andrea Scalabrini
- Department of Psychological Health and Territorial Sciences (DiSPuTer), G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Valdo Ricca
- Psychiatry Unit, Department of Health Sciences, University of Florence, Florence, Italy
| | - Georg Northoff
- Mental Health Centre, Zhejiang University School of Medicine, Hangzhou, China.,Centre for Cognition and Brain Disorders, Hangzhou Normal University, Hangzhou, China.,The Royal's Institute of Mental Health Research & University of Ottawa, Ottawa, Ontario, Canada.,Centre for Neural Dynamics, Faculty of Medicine, Brain and Mind Research Institute, University of Ottawa, Ottawa, Ontario, Canada
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2
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Rafee S, Al-Hinai M, Hutchinson M. Adult-Onset Idiopathic Cervical Dystonia. EUROPEAN MEDICAL JOURNAL 2022. [DOI: 10.33590/emj/10005730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Adult-onset idiopathic focal dystonia is the most common type of primary dystonia, and adult-onset idiopathic cervical dystonia (AOICD) is its most prevalent phenotype. AOICD is an autosomal-dominant disorder with markedly reduced penetrance; clinical expression is dependent on age, sex, and environmental exposure. Motor symptoms at presentation are poorly recognised by non-specialists, leading to long delays in diagnosis. Certain features of history and examination can help diagnose cervical dystonia. There is a relatively high prevalence of anxiety and/or depression, which adversely affects health-related quality of life. Recent studies indicate that patients with AOICD also have disordered social cognition, particularly affecting emotional sensory processing. AOICD can be treated reasonably effectively with botulinum toxin injections, given at 3-month intervals. Oral antidystonic medications are often trialled initially, but are largely ineffective. Comprehensive modern management of patients with AOICD requires recognition of presence of mood disorders, and actively treating the endogenous mood disorder with antidepressant therapy. Botulinum toxin injections alone, no matter how expertly given, will not provide optimal therapy and improved health-related quality of life without an holistic approach to patient management. Increasing evidence indicates that AOICD is a neurophysiological network disorder of GABAergic inhibition, causing a syndrome of dystonia, mood disturbance, and social cognitive dysfunction, with the superior colliculus playing a central role.
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Affiliation(s)
- Shameer Rafee
- Department of Neurology, St Vincent’s University Hospital, Dublin, Republic of Ireland
| | - Mahmood Al-Hinai
- Department of Neurology, St Vincent’s University Hospital, Dublin, Republic of Ireland
| | - Michael Hutchinson
- Department of Neurology, St Vincent’s University Hospital, Dublin, Republic of Ireland
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3
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Bouziane I, Das M, Friston KJ, Caballero-Gaudes C, Ray D. Enhanced top-down sensorimotor processing in somatic anxiety. Transl Psychiatry 2022; 12:295. [PMID: 35879273 PMCID: PMC9314421 DOI: 10.1038/s41398-022-02061-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 11/10/2022] Open
Abstract
Functional neuroimaging research on anxiety has traditionally focused on brain networks associated with the psychological aspects of anxiety. Here, instead, we target the somatic aspects of anxiety. Motivated by the growing appreciation that top-down cortical processing plays a crucial role in perception and action, we used resting-state functional MRI data from the Human Connectome Project and Dynamic Causal Modeling (DCM) to characterize effective connectivity among hierarchically organized regions in the exteroceptive, interoceptive, and motor cortices. In people with high (fear-related) somatic arousal, top-down effective connectivity was enhanced in all three networks: an observation that corroborates well with the phenomenology of anxiety. The anxiety-associated changes in connectivity were sufficiently reliable to predict whether a new participant has mild or severe somatic anxiety. Interestingly, the increase in top-down connections to sensorimotor cortex were not associated with fear affect scores, thus establishing the (relative) dissociation between somatic and cognitive dimensions of anxiety. Overall, enhanced top-down effective connectivity in sensorimotor cortices emerges as a promising and quantifiable candidate marker of trait somatic anxiety.
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Affiliation(s)
- Ismail Bouziane
- grid.423986.20000 0004 0536 1366Basque Center on Cognition, Brain and Language, San Sebastian, Spain ,grid.11480.3c0000000121671098University of the Basque Country, San Sebastian, Spain
| | - Moumita Das
- grid.462072.50000 0004 0467 2410Basque Center for Applied Mathematics, Bilbao, Spain
| | - Karl J. Friston
- grid.450002.30000 0004 0611 8165Wellcome Centre for Human Neuroimaging, London, UK ,grid.83440.3b0000000121901201Queen Square Institute of Neurology, University College London, London, UK ,grid.436283.80000 0004 0612 2631The National Hospital for Neurology and Neurosurgery, London, UK
| | - Cesar Caballero-Gaudes
- grid.423986.20000 0004 0536 1366Basque Center on Cognition, Brain and Language, San Sebastian, Spain
| | - Dipanjan Ray
- Basque Center on Cognition, Brain and Language, San Sebastian, Spain.
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4
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Seok D, Tadayonnejad R, Wong WW, O'Neill J, Cockburn J, Bari AA, O'Doherty JP, Feusner JD. Neurocircuit dynamics of arbitration between decision-making strategies across obsessive-compulsive and related disorders. Neuroimage Clin 2022; 35:103073. [PMID: 35689978 PMCID: PMC9192960 DOI: 10.1016/j.nicl.2022.103073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 05/11/2022] [Accepted: 05/31/2022] [Indexed: 11/20/2022]
Abstract
Obsessive-compulsive and related disorders (OCRD) include OCD and BDD. Neural differences in decision-making arbitration may underlie OCRD symptoms. Resting-state effective connectivity was used to assess arbitration circuitry. Greater left putamen inhibition via left ventrolateral prefrontal cortex in OCRD. Stronger left putamen inhibition was correlated with less severe symptoms.
Obsessions and compulsions are central components of obsessive–compulsive disorder (OCD) and obsessive–compulsive related disorders such as body dysmorphic disorder (BDD). Compulsive behaviours may result from an imbalance of habitual and goal-directed decision-making strategies. The relationship between these symptoms and the neural circuitry underlying habitual and goal-directed decision-making, and the arbitration between these strategies, remains unknown. This study examined resting state effective connectivity between nodes of these systems in two cohorts with obsessions and compulsions, each compared with their own corresponding healthy controls: OCD (nOCD = 43; nhealthy = 24) and BDD (nBDD = 21; nhealthy = 16). In individuals with OCD, the left ventrolateral prefrontal cortex, a node of the arbitration system, exhibited more inhibitory causal influence over the left posterolateral putamen, a node of the habitual system, compared with controls. Inhibitory causal influence in this connection showed a trend for a similar pattern in individuals with BDD compared with controls. Those with stronger negative connectivity had lower obsession and compulsion severity in both those with OCD and those with BDD. These relationships were not evident within the habitual or goal-directed circuits, nor were they associated with depressive or anxious symptomatology. These results suggest that abnormalities in the arbitration system may represent a shared neural phenotype across these two related disorders that is specific to obsessive–compulsive symptoms. In addition to nosological implications, these results identify potential targets for novel, circuit-specific treatments.
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Affiliation(s)
- Darsol Seok
- Division of Cognitive Neuroscience, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90024, USA
| | - Reza Tadayonnejad
- Division of Neuromodulation, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90024, USA; Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, CA, 1200 E. California Blvd., Code 228-77, Pasadena, CA 91125, USA
| | - Wan-Wa Wong
- Division of Cognitive Neuroscience, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90024, USA
| | - Joseph O'Neill
- Division of Child and Adolescent Psychiatry, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90024, USA
| | - Jeff Cockburn
- Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, CA, 1200 E. California Blvd., Code 228-77, Pasadena, CA 91125, USA
| | - Ausaf A Bari
- Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90095, USA
| | - John P O'Doherty
- Division of Humanities and Social Sciences, California Institute of Technology, Pasadena, CA, 1200 E. California Blvd., Code 228-77, Pasadena, CA 91125, USA; Computation & Neural Systems Program, California Institute of Technology, Pasadena, CA, 1200 East California Boulevard, Pasadena, CA 91125, USA
| | - Jamie D Feusner
- Division of Cognitive Neuroscience, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, 760 Westwood Plaza, Los Angeles, CA 90024, USA; Centre for Addiction and Mental Health, 250 College Street, Toronto, ON M5T 1R8, Canada; Temerty Faculty of Medicine, Department of Psychiatry, University of Toronto, 250 College Street, 8th floor, Toronto, ON M5T 1R8, Canada; Department of Women's and Children's Health, The Karolinska Institute, Tomtebodavägen 18A, 171 77 Solna, Sweden.
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5
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Kim MK, Eom H, Kwon JH, Kyeong S, Kim JJ. Neural effects of a short-term virtual reality self-training program to reduce social anxiety. Psychol Med 2022; 52:1296-1305. [PMID: 32880252 DOI: 10.1017/s0033291720003098] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Social anxiety disorder (SAD) is characterized by anxiety regarding social situations, avoidance of external social stimuli, and negative self-beliefs. Virtual reality self-training (VRS) at home may be a good interim modality for reducing social fears before formal treatment. This study aimed to find neurobiological evidence for the therapeutic effect of VRS. METHODS Fifty-two patients with SAD were randomly assigned to a VRS or waiting list (WL) group. The VRS group received an eight-session VRS program for 2 weeks, whereas the WL group received no intervention. Clinical assessments and functional magnetic resonance imaging scanning with the distress and speech evaluation tasks were repeatedly performed at baseline and after 3 weeks. RESULTS The post-VRS assessment showed significantly decreased anxiety and avoidance scores, distress index, and negative evaluation index for 'self', but no change in the negative evaluation index for 'other'. Patients showed significant responses to the distress task in various regions, including both sides of the prefrontal regions, occipital regions, insula, and thalamus, and to the speech evaluation task in the bilateral anterior cingulate cortex. Among these, significant neuronal changes after VRS were observed only in the right lingual gyrus and left thalamus. CONCLUSIONS VRS-induced improvements in the ability to pay attention to social stimuli without avoidance and even positively modulate emotional cues are based on functional changes in the visual cortices and thalamus. Based on these short-term neuronal changes, VRS can be a first intervention option for individuals with SAD who avoid society or are reluctant to receive formal treatment.
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Affiliation(s)
- Min-Kyeong Kim
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hyojung Eom
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jun Hee Kwon
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Sunghyon Kyeong
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Jin Kim
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Korea
- Department of Psychiatry, Yonsei University College of Medicine, Seoul, Korea
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6
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Yu X, Ruan Y, Zhang Y, Wang J, Liu Y, Zhang J, Zhang L. Cognitive Neural Mechanism of Social Anxiety Disorder: A Meta-Analysis Based on fMRI Studies. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18115556. [PMID: 34067468 PMCID: PMC8196988 DOI: 10.3390/ijerph18115556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/13/2021] [Accepted: 05/19/2021] [Indexed: 11/16/2022]
Abstract
Objective: The present meta-analysis aimed to explore the cognitive and neural mechanism of social anxiety disorder (SAD) from a whole-brain view, and compare the differences in brain activations under different task paradigms. Methods: We searched Web of Science Core Collection and other databases with the keywords related to social anxiety, social phobia, and functional magnetic resonance imaging (fMRI) for comparing persons with SAD to healthy controls and used the activation likelihood estimation method. Thirty-seven papers met the inclusion criteria, including 15 with emotional faces as stimuli, 8 presenting specific situations as stimuli, and 14 using other types of tasks as stimuli. Among these papers, 654 participants were in the SAD group and 594 participants were in the control group with 335 activation increase points and 115 activation decrease points. Results: Whole-brain analysis showed that compared with healthy controls, persons with SAD showed significantly lower activation of the left anterior cingulate gyrus (MNI coordinate: x = −6, y = 22, z = 38; p 0.001). Sub-group analysis based on task indicated that when performing tasks with emotional faces as stimuli, persons with SAD showed significantly lower activation of the left cerebellar slope and fusiform gyrus (MNI coordinate: x = −26, y = −68, z = −12; p 0.001), and significantly higher activation of the right supramarginal gyrus and angular gyrus, than healthy controls (MNI coordinate: x = 58, y = −52, z = 30; p 0.001). Conclusion: Individuals with social anxiety disorder show abnormal activation in the cingulate gyrus, which is responsible for the process of attention control, and task type can influence the activation pattern.
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Affiliation(s)
- Xianglian Yu
- Department of Education, Jianghan University, Wuhan 430056, China; (X.Y.); (J.W.); (Y.L.)
- Key Laboratory of Adolescent Cyberpsychology and Behavior, Ministry of Education, Key Laboratory of Human Development and Mental Health of Hubei Province, School of Psychology, Central China Normal University, Wuhan 430056, China
| | - Yijun Ruan
- Department of Psychology, The Chinese University of Hong Kong, Hong Kong 999077, China;
| | - Yawen Zhang
- Department of Medical Psychology, School of Health Humanities, Peking University, Beijing 100191, China;
| | - Jiayi Wang
- Department of Education, Jianghan University, Wuhan 430056, China; (X.Y.); (J.W.); (Y.L.)
| | - Yuting Liu
- Department of Education, Jianghan University, Wuhan 430056, China; (X.Y.); (J.W.); (Y.L.)
| | - Jibiao Zhang
- Department of Education, Jianghan University, Wuhan 430056, China; (X.Y.); (J.W.); (Y.L.)
- Correspondence: (J.Z.); (L.Z.); Tel.: +86-151-1631-9551 (J.Z.); Tel.: +86-186-2215-2329 (L.Z.)
| | - Lin Zhang
- Key Laboratory of Adolescent Cyberpsychology and Behavior, Ministry of Education, Key Laboratory of Human Development and Mental Health of Hubei Province, School of Psychology, Central China Normal University, Wuhan 430056, China
- Correspondence: (J.Z.); (L.Z.); Tel.: +86-151-1631-9551 (J.Z.); Tel.: +86-186-2215-2329 (L.Z.)
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7
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A multisensory perspective onto primate pulvinar functions. Neurosci Biobehav Rev 2021; 125:231-243. [PMID: 33662442 DOI: 10.1016/j.neubiorev.2021.02.043] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 02/18/2021] [Accepted: 02/25/2021] [Indexed: 02/08/2023]
Abstract
Perception in ambiguous environments relies on the combination of sensory information from various sources. Most associative and primary sensory cortical areas are involved in this multisensory active integration process. As a result, the entire cortex appears as heavily multisensory. In this review, we focus on the contribution of the pulvinar to multisensory integration. This subcortical thalamic nucleus plays a central role in visual detection and selection at a fast time scale, as well as in the regulation of visual processes, at a much slower time scale. However, the pulvinar is also densely connected to cortical areas involved in multisensory integration. In spite of this, little is known about its multisensory properties and its contribution to multisensory perception. Here, we review the anatomical and functional organization of multisensory input to the pulvinar. We describe how visual, auditory, somatosensory, pain, proprioceptive and olfactory projections are differentially organized across the main subdivisions of the pulvinar and we show that topography is central to the organization of this complex nucleus. We propose that the pulvinar combines multiple sources of sensory information to enhance fast responses to the environment, while also playing the role of a general regulation hub for adaptive and flexible cognition.
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8
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Wiener A, Rohr CS, Naor N, Villringer A, Okon-Singer H. Emotion Regulation in Essential Hypertension: Roles of Anxiety, Stress, and the Pulvinar. Front Behav Neurosci 2020; 14:80. [PMID: 32547376 PMCID: PMC7270409 DOI: 10.3389/fnbeh.2020.00080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/28/2020] [Indexed: 12/18/2022] Open
Affiliation(s)
- Avigail Wiener
- Department of Psychology, School of Psychological Sciences, University of Haifa, Haifa, Israel.,The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Haifa, Israel
| | - Christiane S Rohr
- Hotchkiss Brain Institute, The University of Calgary, Calgary, AB, Canada.,Mathison Centre for Mental Health Research and Education, The University of Calgary, Calgary, AB, Canada.,Department of Radiology, Cumming School of Medicine, The University of Calgary, Calgary, AB, Canada
| | - Navot Naor
- Department of Psychology,University of Maryland, College Park, MD, United States
| | - Arno Villringer
- Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.,Department of Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - Hadas Okon-Singer
- Department of Psychology, School of Psychological Sciences, University of Haifa, Haifa, Israel.,The Integrated Brain and Behavior Research Center (IBBR), University of Haifa, Haifa, Israel
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9
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The influence of subcortical shortcuts on disordered sensory and cognitive processing. Nat Rev Neurosci 2020; 21:264-276. [PMID: 32269315 DOI: 10.1038/s41583-020-0287-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2020] [Indexed: 12/14/2022]
Abstract
The very earliest stages of sensory processing have the potential to alter how we perceive and respond to our environment. These initial processing circuits can incorporate subcortical regions, such as the thalamus and brainstem nuclei, which mediate complex interactions with the brain's cortical processing hierarchy. These subcortical pathways, many of which we share with other animals, are not merely vestigial but appear to function as 'shortcuts' that ensure processing efficiency and preservation of vital life-preserving functions, such as harm avoidance, adaptive social interactions and efficient decision-making. Here, we propose that functional interactions between these higher-order and lower-order brain areas contribute to atypical sensory and cognitive processing that characterizes numerous neuropsychiatric disorders.
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10
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Task MRI-Based Functional Brain Network of Anxiety. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1191:3-20. [PMID: 32002919 DOI: 10.1007/978-981-32-9705-0_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Magnetic resonance imaging (MRI) is a good tool for researchers to understand the biological mechanisms and pathophysiology of the brain due to the translational characteristics of MRI methods. For the psychiatric illness, this kind of mental disorders usually have minor alterations when compared to traditional neurological disorders. Therefore the functional study, such as functional connectivity, would play a significant role for understanding the pathophysiology of mental disorders. This chapter would focus on the discussion of task MRI-based functional network studies in anxiety. For social anxiety disorder, the limbic system, such as the temporal lobe, amygdala, and hippocampus, would show alterations in the functional connectivity with frontal regions, such as anterior cingulate, prefrontal, and orbitofrontal cortices. PD has anterior cingulate cortex-amygdala alterations in fear conditioning, frontoparietal alterations in attention network task, and limbic-prefrontal alterations in emotional task. A similar amygdala-based aberrant functional connectivity in specific phobia is observed. The mesocorticolimbic and limbic-prefrontal functional alterations are found in generalized anxiety disorder. The major components of task MRI-based functional connectivity in anxiety include limbic and frontal regions which might play a vital role for the origination of anxiety under different scenarios and tasks.
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11
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McFadyen J, Mattingley JB, Garrido MI. An afferent white matter pathway from the pulvinar to the amygdala facilitates fear recognition. eLife 2019; 8:40766. [PMID: 30648533 PMCID: PMC6335057 DOI: 10.7554/elife.40766] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 12/17/2018] [Indexed: 12/13/2022] Open
Abstract
Our ability to rapidly detect threats is thought to be subserved by a subcortical pathway that quickly conveys visual information to the amygdala. This neural shortcut has been demonstrated in animals but has rarely been shown in the human brain. Importantly, it remains unclear whether such a pathway might influence neural activity and behavior. We conducted a multimodal neuroimaging study of 622 participants from the Human Connectome Project. We applied probabilistic tractography to diffusion-weighted images, reconstructing a subcortical pathway to the amygdala from the superior colliculus via the pulvinar. We then computationally modeled the flow of haemodynamic activity during a face-viewing task and found evidence for a functionally afferent pulvinar-amygdala pathway. Critically, individuals with greater fibre density in this pathway also had stronger dynamic coupling and enhanced fearful face recognition. Our findings provide converging evidence for the recruitment of an afferent subcortical pulvinar connection to the amygdala that facilitates fear recognition. Editorial note This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that minor issues remain unresolved (see decision letter).
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Affiliation(s)
- Jessica McFadyen
- Queensland Brain Institute, University of Queensland, Brisbane, Australia.,Australian Research Council of Excellence for Integrative Brain Function, Clayton, Australia
| | - Jason B Mattingley
- Queensland Brain Institute, University of Queensland, Brisbane, Australia.,Australian Research Council of Excellence for Integrative Brain Function, Clayton, Australia.,School of Psychology, University of Queensland, Brisbane, Australia.,Canadian Institute for Advanced Research (CIFAR), Toronto, Canada
| | - Marta I Garrido
- Queensland Brain Institute, University of Queensland, Brisbane, Australia.,Australian Research Council of Excellence for Integrative Brain Function, Clayton, Australia.,School of Mathematics and Physics, University of Queensland, Brisbane, Australia.,Centre for Advanced Imaging, University of Queensland, Brisbane, Australia
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12
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Pregenual Anterior Cingulate Dysfunction Associated with Depression in OCD: An Integrated Multimodal fMRI/ 1H MRS Study. Neuropsychopharmacology 2018; 43:1146-1155. [PMID: 29052616 PMCID: PMC5854805 DOI: 10.1038/npp.2017.249] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 09/18/2017] [Accepted: 10/15/2017] [Indexed: 11/08/2022]
Abstract
Depression is a commonly occurring symptom in obsessive-compulsive disorder (OCD), and is associated with worse functional impairment, poorer quality of life, and poorer treatment response. Understanding the underlying neurochemical and connectivity-based brain mechanisms of this important symptom domain in OCD is necessary for development of novel, more globally effective treatments. To investigate biopsychological mechanisms of comorbid depression in OCD, we examined effective connectivity and neurochemical signatures in the pregenual anterior cingulate cortex (pACC), a structure known to be involved in both OCD and depression. Resting-state functional magnetic resonance imaging (fMRI) and 1H magnetic resonance spectroscopy (MRS) data were obtained from participants with OCD (n=49) and healthy individuals of equivalent age and sex (n=25). Granger causality-based effective (directed) connectivity was used to define causal networks involving the right and left pACC. The interplay between fMRI connectivity, 1H MRS and clinical data was explored by applying moderation and mediation analyses. We found that the causal influence of the right dorsal anterior midcingulate cortex (daMCC) on the right pACC was significantly lower in the OCD group and showed significant correlation with depressive symptom severity in the OCD group. Lower and moderate levels of glutamate (Glu) in the right pACC significantly moderated the interaction between right daMCC-pACC connectivity and depression severity. Our results suggest a biochemical-connectivity-psychological model of pACC dysfunction contributing to depression in OCD, particularly involving intracingulate connectivity and glutamate levels in the pACC. These findings have implications for potential molecular and network targets for treatment of this multi-faceted psychiatric condition.
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