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Xia Z, Cao Z, Surento W, Zhang L, Qiu L, Xu Q, Zhang L, Li L, Cao Y, Luo Y, Lu G, Qi R. Relationship between SLC6A2 gene polymorphisms and brain volume in Han Chinese adults who lost their sole child. BMC Psychiatry 2024; 24:11. [PMID: 38166870 PMCID: PMC10763183 DOI: 10.1186/s12888-023-05467-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Norepinephrine transporter (NET) is encoded by the SLC6A2 gene and is a potential target for studying the pathogenesis of PTSD. To the best of our knowledge, no prior investigations have examined SLC6A2 polymorphism-related neuroimaging abnormalities in PTSD patients. METHODS In 218 Han Chinese adults who had lost their sole child, we investigated the association between the T-182 C SLC6A2 genotype and gray matter volume (GMV). Participants included 57 PTSD sufferers and 161 non-PTSD sufferers, and each group was further separated into three subgroups based on each participant's SLC6A2 genotype (TT, CT, and CC). All participants received magnetic resonance imaging (MRI) and clinical evaluation. To assess the effects of PTSD diagnosis, genotype, and genotype × diagnosis interaction on GMV, 2 × 3 full factorial designs were used. Pearson's correlations were used to examine the association between GMV and CAPS, HAMD, and HAMA. RESULTS The SLC6A2 genotype showed significant main effects on GMV of the left superior parietal gyrus (SPG) and the bilateral middle cingulate gyrus (MCG). Additionally, impacts of the SLC6A2 genotype-diagnosis interaction were discovered in the left superior frontal gyrus (SFG). The CAPS, HAMA, and HAMD scores, as well as the genotype main effect and diagnostic SLC6A2 interaction, did not significantly correlate with each other. CONCLUSION These findings indicate a modulatory effect that the SLC6A2 polymorphism exerts on the SPG and MCG, irrespective of PTSD diagnosis. We found evidence to suggest that the SLC6A2 genotype-diagnosis interaction on SFG may potentially contribute to PTSD pathogenesis in adults who lost their sole child.
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Affiliation(s)
- Zhuoman Xia
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China
| | - Zhihong Cao
- Department of Radiology, the Affiliated Yixing Hospital of Jiangsu University, 75 Tongzhenguan Road, Wuxi, Wuxi, 214200, China
| | - Wesley Surento
- Imaging Genetics Center, Mark and Mary Stevens Neuroimaging and Informatics Institute, University of Southern California, Marina del Rey, Los Angeles, CA, 90292, USA
| | - Li Zhang
- Mental Health Institute, the Second Xiangya Hospital, Key Laboratory of Psychiatry and Mental Health of Hunan Province, National Technology Institute of Psychiatry, Central South University, Changsha, Hunan, 410011, China
| | - Lianli Qiu
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China
| | - Qiang Xu
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China
| | - Longjiang Zhang
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China
| | - Lingjiang Li
- Mental Health Institute, the Second Xiangya Hospital, Key Laboratory of Psychiatry and Mental Health of Hunan Province, National Technology Institute of Psychiatry, Central South University, Changsha, Hunan, 410011, China
| | - Yang Cao
- College of Arts & Science, Vanderbilt University, Nashville, TN, 37235, USA
| | - Yifeng Luo
- Department of Radiology, the Affiliated Yixing Hospital of Jiangsu University, 75 Tongzhenguan Road, Wuxi, Wuxi, 214200, China.
| | - Guangming Lu
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China.
| | - Rongfeng Qi
- Department of Medical Imaging, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, Jiangsu, 210002, China.
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Dehghani A, Soltanian-Zadeh H, Hossein-Zadeh GA. Neural modulation enhancement using connectivity-based EEG neurofeedback with simultaneous fMRI for emotion regulation. Neuroimage 2023; 279:120320. [PMID: 37586444 DOI: 10.1016/j.neuroimage.2023.120320] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/06/2023] [Accepted: 08/10/2023] [Indexed: 08/18/2023] Open
Abstract
Emotion regulation plays a key role in human behavior and overall well-being. Neurofeedback is a non-invasive self-brain training technique used for emotion regulation to enhance brain function and treatment of mental disorders through behavioral changes. Previous neurofeedback research often focused on using activity from a single brain region as measured by fMRI or power from one or two EEG electrodes. In a new study, we employed connectivity-based EEG neurofeedback through recalling positive autobiographical memories and simultaneous fMRI to upregulate positive emotion. In our novel approach, the feedback was determined by the coherence of EEG electrodes rather than the power of one or two electrodes. We compared the efficiency of this connectivity-based neurofeedback to traditional activity-based neurofeedback through multiple experiments. The results showed that connectivity-based neurofeedback effectively improved BOLD signal change and connectivity in key emotion regulation regions such as the amygdala, thalamus, and insula, and increased EEG frontal asymmetry, which is a biomarker for emotion regulation and treatment of mental disorders such as PTSD, anxiety, and depression and coherence among EEG channels. The psychometric evaluations conducted both before and after the neurofeedback experiments revealed that participants demonstrated improvements in enhancing positive emotions and reducing negative emotions when utilizing connectivity-based neurofeedback, as compared to traditional activity-based and sham neurofeedback approaches. These findings suggest that connectivity-based neurofeedback may be a superior method for regulating emotions and could be a useful alternative therapy for mental disorders, providing individuals with greater control over their brain and mental functions.
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Affiliation(s)
- Amin Dehghani
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran; Department of Psychological and Brain Sciences, Dartmouth College, Hanover, NH, USA.
| | - Hamid Soltanian-Zadeh
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran; School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran; Departments of Radiology and Research Administration, Henry Ford Health System, Detroit, MI, USA
| | - Gholam-Ali Hossein-Zadeh
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran; School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
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3
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Sharpley CF, Evans ID, Bitsika V, Arnold WM, Jesulola E, Agnew LL. Frontal Alpha Asymmetry Argues for the Heterogeneity of Psychological Resilience. Brain Sci 2023; 13:1354. [PMID: 37759955 PMCID: PMC10526132 DOI: 10.3390/brainsci13091354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 09/29/2023] Open
Abstract
Depression is associated with frontal alpha asymmetry (FAA) and Psychological Resilience (PR), although in different ways. Only cursory attention has been given to how these three constructs interact despite the possible clinical and research implications of those associations. One limitation of recent research into these associations has been conceptualising PR as a unitary construct, whereas it has been shown to be multi-component. This study investigated the underlying components of PR, their correlations with FAA, and the effect that participants' depressive status had upon those correlations in a community sample of 54 males and 46 females aged between 18 yr and 75 years. Results confirmed the overall inverse association between total PR and depression for four of the original five PR components and for one of the two components found in this sample. Similarly, there were differences between the ways that FAA and PR components were associated, depending upon the depressive status of participants. Source localisation data indicated that the PR components were not uniformly correlated with alpha activity in the same brain regions. These findings of content, efficacy, and neurophysiological differences between the five components of PR and their associations with FAA argue against consideration of PR as a unitary construct.
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Affiliation(s)
- Christopher F. Sharpley
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
- School of Science & Technology, University of New England, Queen Elizabeth Drive, Armidale, NSW 2351, Australia
| | - Ian D. Evans
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
| | - Vicki Bitsika
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
| | - Wayne M. Arnold
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
| | - Emmanuel Jesulola
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
- Department of Neurosurgery, The Alfred Hospital, Melbourne, VIC 4222, Australia
| | - Linda L. Agnew
- Brain-Behavior Research Group, University of New England, Armidale, NSW 2350, Australia; (I.D.E.); (V.B.); (W.M.A.); (E.J.)
- Griffith University, Nathan, QLD 4222, Australia
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López-Castro T, Martin L, Nickley S, Saraiya TC, Melara RD. Frontal Alpha Asymmetry in Posttraumatic Stress Disorder: Group Differences Among Individuals With and Without PTSD During an Inhibitory Control Task. Clin EEG Neurosci 2023; 54:472-482. [PMID: 34657474 PMCID: PMC9022109 DOI: 10.1177/15500594211046703] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The current study examined frontal alpha asymmetry (FAA) as a marker of approach- and avoidance-related prefrontal activity in participants with and without trauma exposure and posttraumatic stress disorder (PTSD). We investigated FAA in an inhibitory control paradigm (threatening vs nonthreatening cues) under 2 levels of cognitive demand (baseline: images constant within a block of trials; vs filtering: images varied randomly within a block) in 3 groups of participants: individuals with PTSD (n = 16), exposed to trauma but without PTSD (n = 14), and a control group without PTSD or trauma exposure (n = 15). Under low demand (baseline), both PTSD and trauma-exposed participants exhibited significantly greater relative left than right frontal brain activity (approach) to threatening than to nonthreatening images. Under high demand (filtering), no FAA differences were found between threatening and nonthreatening images, but PTSD participants revealed more relative left than right FAA, whereas trauma-exposed participants showed reduced left relative right FAA. In all conditions, healthy controls exhibited reduced left relative to right FAA and no differences between threatening and nonthreatening images. Study findings suggest dysfunctional prefrontal mechanisms of emotion regulation in PTSD, but adaptive prefrontal regulation in trauma-exposed individuals without PTSD.
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Affiliation(s)
- Teresa López-Castro
- Psychology Department, The City College of New York, The City University of New York, 160 Convent Avenue, New York, NY 10032
| | - Laura Martin
- George Mason University, 4400 University Drive, Fairfax, VA, 22030
| | - Sean Nickley
- Psychology Department, Long Island University, 1 University Plaza, H811, Brooklyn, NY 11201
| | - Tanya C. Saraiya
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC
| | - Robert D. Melara
- Psychology Department, The City College of New York, The City University of New York, 160 Convent Avenue, New York, NY 10032
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Dehghani A, Soltanian-Zadeh H, Hossein-Zadeh GA. Probing fMRI brain connectivity and activity changes during emotion regulation by EEG neurofeedback. Front Hum Neurosci 2023; 16:988890. [PMID: 36684847 PMCID: PMC9853008 DOI: 10.3389/fnhum.2022.988890] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 12/13/2022] [Indexed: 01/09/2023] Open
Abstract
Despite the existence of several emotion regulation studies using neurofeedback, interactions among a small number of regions were evaluated, and therefore, further investigation is needed to understand the interactions of the brain regions involved in emotion regulation. We implemented electroencephalography (EEG) neurofeedback with simultaneous functional magnetic resonance imaging (fMRI) using a modified happiness-inducing task through autobiographical memories to upregulate positive emotion. Then, an explorative analysis of whole brain regions was done to understand the effect of neurofeedback on brain activity and the interaction of whole brain regions involved in emotion regulation. The participants in the control and experimental groups were asked to do emotion regulation while viewing positive images of autobiographical memories and getting sham or real (based on alpha asymmetry) EEG neurofeedback, respectively. The proposed multimodal approach quantified the effects of EEG neurofeedback in changing EEG alpha power, fMRI blood oxygenation level-dependent (BOLD) activity of prefrontal, occipital, parietal, and limbic regions (up to 1.9% increase), and functional connectivity in/between prefrontal, parietal, limbic system, and insula in the experimental group. New connectivity links were identified by comparing the brain functional connectivity between experimental conditions (Upregulation and View blocks) and also by comparing the brain connectivity of the experimental and control groups. Psychometric assessments confirmed significant changes in positive and negative mood states in the experimental group by neurofeedback. Based on the exploratory analysis of activity and connectivity among all brain regions involved in emotion regions, we found significant BOLD and functional connectivity increases due to EEG neurofeedback in the experimental group, but no learning effect was observed in the control group. The results reveal several new connections among brain regions as a result of EEG neurofeedback which can be justified according to emotion regulation models and the role of those regions in emotion regulation and recalling positive autobiographical memories.
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Affiliation(s)
- Amin Dehghani
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran,Department of Psychological and Brain Sciences, Dartmouth College, Hanover, NH, United States,*Correspondence: Amin Dehghani, ,
| | - Hamid Soltanian-Zadeh
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran,Medical Image Analysis Lab, Department of Radiology and Research Administration, Henry Ford Health System, Detroit, MI, United States,School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
| | - Gholam-Ali Hossein-Zadeh
- School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran,School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
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Sánchez MAA, González JA, Sánchez Fonseca JD, Calderón NP, Cárdenas-Poveda DC, López JML. Analysis of EEG and ECG in women with intimate partner violence experience during an emotional task. Int J Psychophysiol 2023; 183:148-158. [PMID: 36502937 DOI: 10.1016/j.ijpsycho.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 11/17/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022]
Abstract
Intimate Partner Violence (IPV) has been associated with cognitive, emotional, physical and physiological alterations, and with the presence of anxiety disorders. There is not enough research on this problem from an interdisciplinary approach despite the above. Therefore, this research compared the emotion perception and electrophysiological responses, elicited by an emotional task, in women who had experienced IPV and women who had not (WIPV). Forty-five participants (22 with and 23 without IPV experience) were presented with nine images from the International Affective Picture System (IAPS) database and performed a self-report using the Self-Assessment Manikin (SAM). In parallel, electrophysiological signals (ECG and EEG) were acquired, for the analysis of emotional response. In the between-group analysis, the IPV group showed lower perceived dominance and greater central asymmetry in the alpha band than the WIPV group; additionally, the IPV group exhibited a significant positive correlation between the valence of the images and the alpha band power in central areas. In the within-group analysis, the WIPV group showed greater activation in the alpha band and alpha/beta ratio in frontal areas during the emotional elicitation, as compared to baseline. Furthermore, the ECG analysis showed that, for the IPV group, there was a decrease in the power of the high-frequency (HF) band and an increase in the power of the very-low-frequency (VLF) band of heart rate variability (HRV) during the elicitation stage. It is hypothesized that the IPV group could present higher stress levels and greater physiological activity during emotional stimuli than the WIPV group. Possible changes in emotional regulation and anxiety levels due to IPV experiences are discussed.
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Affiliation(s)
- Miguel Angel Angulo Sánchez
- Corporación Universitaria Minuto de Dios Uniminuto, Psychology Program, CRA 73 A 81B-70, Bogotá 111021, Bogotá D.C, Colombia.
| | - Juan Andrés González
- Escuela Colombiana de Ingeniería Julio Garavito, Biomedical Engineering Program, Av. CRA 40 205-59, Bogotá 111166, Bogotá D.C, Colombia
| | - Jessica D Sánchez Fonseca
- Escuela Colombiana de Ingeniería Julio Garavito, Biomedical Engineering Program, Av. CRA 40 205-59, Bogotá 111166, Bogotá D.C, Colombia
| | - Natalia Perea Calderón
- Escuela Colombiana de Ingeniería Julio Garavito, Biomedical Engineering Program, Av. CRA 40 205-59, Bogotá 111166, Bogotá D.C, Colombia
| | - D Carolina Cárdenas-Poveda
- Corporación Universitaria Minuto de Dios Uniminuto, Psychology Program, CRA 73 A 81B-70, Bogotá 111021, Bogotá D.C, Colombia
| | - Juan Manuel López López
- Escuela Colombiana de Ingeniería Julio Garavito, Biomedical Engineering Program, Av. CRA 40 205-59, Bogotá 111166, Bogotá D.C, Colombia
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Im S, Fitzpatrick S, Hien DA, Lopez-Castro T, Pawlak A, Melara RD. Frontal Alpha Asymmetry in Children with Trauma Exposure. Clin EEG Neurosci 2022; 53:418-425. [PMID: 35125036 DOI: 10.1177/15500594221076346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of the current study was to investigate differences in frontal alpha asymmetry (FAA) between children (5-17 years) with or without histories of trauma exposure. EEG data were obtained from 165 children who participated in the Healthy Brain Network Initiative during rest with eyes open and closed. FAA during resting-state electroencephalography was significantly more negative in the trauma-exposed group, suggesting greater left lateralized FAA and avoidance-oriented motivation. Moreover, alpha suppression (difference in alpha amplitude between eyes open and eyes closed conditions) was marginally greater in the trauma-exposed group. The results suggest that early exposure to trauma may be associated with trait-level avoidance of environmental stimuli, which ultimately may be predictive of psychopathology, including posttraumatic stress disorder (PTSD). Study findings thus provide preliminary evidence of brain-based mechanisms that may confer risk for PTSD in the wake of early trauma exposure.
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Affiliation(s)
- Sungjin Im
- 1889Western Kentucky University, Department of Psychology, 1906 College Heights Blvd, Bowling Green, KY 42101, USA.,242612Rutgers University, Center of Alcohol & Substance Use Studies, Rutgers Graduate School of Applied and Professional Psychology, 607 Allison Road, Smithers Hall, 222, Piscataway, NJ 08854, USA
| | - Skye Fitzpatrick
- 7991York University, Department of Psychology, 4700 Keele Street, Toronto, ON, M3J 1P3, USA
| | - Denise A Hien
- 242612Rutgers University, Center of Alcohol & Substance Use Studies, Rutgers Graduate School of Applied and Professional Psychology, 607 Allison Road, Smithers Hall, 222, Piscataway, NJ 08854, USA
| | - Teresa Lopez-Castro
- 14770The City College, 14780City University of New York, Psychology Department, 160 Convent Avenue, NAC 7 to 120, New York, NY 10031, USA
| | - Anthony Pawlak
- 242612Rutgers University, Center of Alcohol & Substance Use Studies, Rutgers Graduate School of Applied and Professional Psychology, 607 Allison Road, Smithers Hall, 222, Piscataway, NJ 08854, USA
| | - Robert D Melara
- 14770The City College, 14780City University of New York, Psychology Department, 160 Convent Avenue, NAC 7 to 120, New York, NY 10031, USA
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Creaser JL, Storr J, Karl A. Brain Responses to a Self-Compassion Induction in Trauma Survivors With and Without Post-traumatic Stress Disorder. Front Psychol 2022; 13:765602. [PMID: 35391975 PMCID: PMC8980710 DOI: 10.3389/fpsyg.2022.765602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 02/14/2022] [Indexed: 11/18/2022] Open
Abstract
Self-compassion (SC) is a mechanism of symptom improvement in post-traumatic stress disorder (PTSD), however, the underlying neurobiological processes are not well understood. High levels of self-compassion are associated with reduced activation of the threat response system. Physiological threat responses to trauma reminders and increased arousal are key symptoms which are maintained by negative appraisals of the self and self-blame. Moreover, PTSD has been consistently associated with functional changes implicated in the brain's saliency and the default mode networks. In this paper, we explore how trauma exposed individuals respond to a validated self-compassion exercise. We distinguish three groups using the PTSD checklist; those with full PTSD, those without PTSD, and those with subsyndromal PTSD. Subsyndromal PTSD is a clinically relevant subgroup in which individuals meet the criteria for reexperiencing along with one of either avoidance or hyperarousal. We use electroencephalography (EEG) alpha-asymmetry and EEG microstate analysis to characterize brain activity time series during the self-compassion exercise in the three groups. We contextualize our results with concurrently recorded autonomic measures of physiological arousal (heart rate and skin conductance), parasympathetic activation (heart rate variability) and self-reported changes in state mood and self-perception. We find that in all three groups directing self-compassion toward oneself activates the negative self and elicits a threat response during the SC exercise and that individuals with subsyndromal PTSD who have high levels of hyperarousal have the highest threat response. We find impaired activation of the EEG microstate associated with the saliency, attention and self-referential processing brain networks, distinguishes the three PTSD groups. Our findings provide evidence for potential neural biomarkers for quantitatively differentiating PTSD subgroups.
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Affiliation(s)
| | - Joanne Storr
- Department of Psychology, University of Exeter, Exeter, United Kingdom
| | - Anke Karl
- Department of Psychology, University of Exeter, Exeter, United Kingdom
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Berretz G, Packheiser J, Wolf OT, Ocklenburg S. Acute stress increases left hemispheric activity measured via changes in frontal alpha asymmetries. iScience 2022; 25:103841. [PMID: 35198894 PMCID: PMC8850739 DOI: 10.1016/j.isci.2022.103841] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 09/08/2021] [Accepted: 01/27/2022] [Indexed: 11/25/2022] Open
Abstract
Frontal EEG alpha band asymmetries have been linked to affective processing in healthy individuals and affective disorders. As stress provides a strong source of negative affect, the present study investigated how acute stress affects frontal EEG alpha asymmetries. Continuous EEG data were acquired from 51 healthy adult participants during stress induction with the Trier Social Stress Test. EEG data were also collected during a non-stressful control condition. Furthermore, EEG resting state data were acquired after both conditions. Under stress, participants showed stronger left hemispheric activation over frontal electrodes as well as reduced left-hemispheric activation over occipital electrodes compared to the control condition. Our results are in line with predictions of the asymmetric inhibition model which postulates that the left prefrontal cortex inhibits negative distractors. Moreover, the results support the capability model of emotional regulation which states that frontal asymmetries during emotional challenge are more pronounced compared to asymmetries during rest. EEG recording during social stress induction Stronger left hemispheric frontal activation during emotional challenge No stress-related changes in resting state EEG after stress induction Support for asymmetric inhibition and the capability model of emotional regulation
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Affiliation(s)
- Gesa Berretz
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, Room: IB 6/109, 44780 Bochum, Germany
- Corresponding author
| | - Julian Packheiser
- Netherlands Institute for Neuroscience, Social Brain Lab, Amsterdam, the Netherlands
| | - Oliver T. Wolf
- Department of Cognitive Psychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Bochum, Germany
| | - Sebastian Ocklenburg
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr University Bochum, Universitätsstraße 150, Room: IB 6/109, 44780 Bochum, Germany
- Department of Psychology, Medical School Hamburg, Hamburg, Germany
- Institute for Cognitive and Affective Neuroscience, Medical School Hamburg, Hamburg, Germany
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10
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Metzen D, Genç E, Getzmann S, Larra MF, Wascher E, Ocklenburg S. Frontal and parietal EEG alpha asymmetry: a large-scale investigation of short-term reliability on distinct EEG systems. Brain Struct Funct 2021; 227:725-740. [PMID: 34676455 PMCID: PMC8843903 DOI: 10.1007/s00429-021-02399-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 09/28/2021] [Indexed: 11/29/2022]
Abstract
EEG resting-state alpha asymmetry is one of the most widely investigated forms of functional hemispheric asymmetries in both basic and clinical neuroscience. However, studies yield inconsistent results. One crucial prerequisite to obtain reproducible results is the reliability of the index of interest. There is a body of research suggesting a moderate-to-good reliability of EEG resting-state alpha asymmetry, but unfortunately sample sizes in these studies are typically small. This study presents the first large-scale short-term reliability study of frontal and parietal EEG resting-state alpha asymmetry. We used the Dortmund Vital Study data set containing 370 participants. In each participant, EEG resting state was recorded eight times, twice with their eyes opened, twice with their eyes-closed, each on two different EEG systems. We found good reliability of EEG alpha power and alpha asymmetry on both systems for electrode pairs. We also found that alpha power asymmetry reliability is higher in the eyes-closed condition than in the eyes-open condition. The frontomedial electrode pair showed weaker reliability than the frontolateral and parietal electrode pairs. Interestingly, we found no population-level alpha asymmetry in frontal electrodes, one of the most investigated electrode sites in alpha asymmetry research. In conclusion, our results suggest that while EEG alpha asymmetry is an overall reliable measure, frontal alpha asymmetry should be assessed using multiple electrode pairs.
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Affiliation(s)
- Dorothea Metzen
- Department of Biopsychology, Faculty of Psychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany.
| | - Erhan Genç
- Department of Psychology and Neurosciences, Leibniz Research Centre for Working Environment and Human Factors, Technical University of Dortmund (IfADo), 44139, Dortmund, Germany
| | - Stephan Getzmann
- Department of Ergonomics, Leibniz Research Centre for Working Environment and Human Factors, Technical University of Dortmund (IfADo), 44139, Dortmund, Germany
| | - Mauro F Larra
- Department of Ergonomics, Leibniz Research Centre for Working Environment and Human Factors, Technical University of Dortmund (IfADo), 44139, Dortmund, Germany
| | - Edmund Wascher
- Department of Ergonomics, Leibniz Research Centre for Working Environment and Human Factors, Technical University of Dortmund (IfADo), 44139, Dortmund, Germany
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Poltorak A. Replicating Cortical Signatures May Open the Possibility for "Transplanting" Brain States via Brain Entrainment. Front Hum Neurosci 2021; 15:710003. [PMID: 34630058 PMCID: PMC8492906 DOI: 10.3389/fnhum.2021.710003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 08/18/2021] [Indexed: 02/03/2023] Open
Abstract
Brain states, which correlate with specific motor, cognitive, and emotional states, may be monitored with noninvasive techniques such as electroencephalography (EEG) and magnetoencephalography (MEG) that measure macroscopic cortical activity manifested as oscillatory network dynamics. These rhythmic cortical signatures provide insight into the neuronal activity used to identify pathological cortical function in numerous neurological and psychiatric conditions. Sensory and transcranial stimulation, entraining the brain with specific brain rhythms, can effectively induce desired brain states (such as state of sleep or state of attention) correlated with such cortical rhythms. Because brain states have distinct neural correlates, it may be possible to induce a desired brain state by replicating these neural correlates through stimulation. To do so, we propose recording brain waves from a "donor" in a particular brain state using EEG/MEG to extract cortical signatures of the brain state. These cortical signatures would then be inverted and used to entrain the brain of a "recipient" via sensory or transcranial stimulation. We propose that brain states may thus be transferred between people by acquiring an associated cortical signature from a donor, which, following processing, may be applied to a recipient through sensory or transcranial stimulation. This technique may provide a novel and effective neuromodulation approach to the noninvasive, non-pharmacological treatment of a variety of psychiatric and neurological disorders for which current treatments are mostly limited to pharmacotherapeutic interventions.
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Affiliation(s)
- Alexander Poltorak
- Neuroenhancement Lab, Suffern, NY, United States
- The City College of New York, New York, NY, United States
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12
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Rogers LJ. Preface for the special issue on Lateralized Behaviour in Domesticated and Captive Animals. Appl Anim Behav Sci 2021. [DOI: 10.1016/j.applanim.2021.105277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Smits FM, Schutter DJLG, van Honk J, Geuze E. Does non-invasive brain stimulation modulate emotional stress reactivity? Soc Cogn Affect Neurosci 2021; 15:23-51. [PMID: 31993648 PMCID: PMC7171378 DOI: 10.1093/scan/nsaa011] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 12/09/2019] [Accepted: 01/08/2020] [Indexed: 12/14/2022] Open
Abstract
Excessive emotional responses to stressful events can detrimentally affect psychological functioning and mental health. Recent studies have provided evidence that non-invasive brain stimulation (NBS) targeting the prefrontal cortex (PFC) can affect the regulation of stress-related emotional responses. However, the reliability and effect sizes have not been systematically analyzed. In the present study, we reviewed and meta-analyzed the effects of repetitive transcranial magnetic (rTMS) and transcranial direct current stimulation (tDCS) over the PFC on acute emotional stress reactivity in healthy individuals. Forty sham-controlled single-session rTMS and tDCS studies were included. Separate random effects models were performed to estimate the mean effect sizes of emotional reactivity. Twelve rTMS studies together showed no evidence that rTMS over the PFC influenced emotional reactivity. Twenty-six anodal tDCS studies yielded a weak beneficial effect on stress-related emotional reactivity (Hedges’ g = −0.16, CI95% = [−0.33, 0.00]). These findings suggest that a single session of NBS is insufficient to induce reliable, clinically significant effects but also provide preliminary evidence that specific NBS methods can affect emotional reactivity. This may motivate further research into augmenting the efficacy of NBS protocols on stress-related processes.
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Affiliation(s)
- Fenne M Smits
- Brain Research & Innovation Centre, Ministry of Defence, Lundlaan 1, 3584 EZ, Utrecht, The Netherlands.,Department of Psychiatry, UMC Utrecht Brain Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - Dennis J L G Schutter
- Experimental Psychology, Helmholtz Institute, Utrecht University, Heidelberglaan 1, 3584 CS, Utrecht, The Netherlands
| | - Jack van Honk
- Experimental Psychology, Helmholtz Institute, Utrecht University, Heidelberglaan 1, 3584 CS, Utrecht, The Netherlands.,Department of Psychiatry and Mental Health, University of Cape Town, Observatory, 7925, Cape Town, South Africa.,Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Observatory, 7925, Cape Town, South Africa
| | - Elbert Geuze
- Brain Research & Innovation Centre, Ministry of Defence, Lundlaan 1, 3584 EZ, Utrecht, The Netherlands.,Department of Psychiatry, UMC Utrecht Brain Center, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
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14
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Camacho E, Brady RO, Lizano P, Keshavan M, Torous J. Advancing translational research through the interface of digital phenotyping and neuroimaging: A narrative review. Biomark Neuropsychiatry 2021. [DOI: 10.1016/j.bionps.2021.100032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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15
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Dagenbach DE, Tegeler CH, Morgan AR, Laurienti PJ, Tegeler CL, Lee SW, Gerdes L, Simpson SL. Effects of an Allostatic Closed-Loop Neurotechnology (HIRREM) on Brain Functional Connectivity Laterality in Military-Related Traumatic Stress. J Neuroimaging 2021; 31:287-296. [PMID: 33406294 PMCID: PMC8005452 DOI: 10.1111/jon.12825] [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: 04/08/2019] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Brain asymmetries are reported in posttraumatic stress disorder, but many aspects of laterality and traumatic stress remain underexplored. This study explores lateralization changes in resting state brain network functional connectivity in a cohort with symptoms of military‐related traumatic stress, associated with use of a closed‐loop neurotechnology, HIRREM. METHODS Eighteen participants (17 males, mean age 41 years [SD = 7]) received 19.5 (1.1) HIRREM sessions over 12 days. Whole brain resting magnetic resonance imaging was done pre‐ and post‐HIRREM. Laterality of functional connectivity was assessed on a whole brain basis, and in six predefined networks or regions. Laterality of connectivity within networks or regions was assessed separately from laterality of connections between networks or regions. RESULTS Before HIRREM, significant laterality effects of connection type (ipsilateral for either side, or contralateral in either direction) were observed for the whole brain, within networks or regions, and between networks or regions. Post‐HIRREM, there were significant changes for within‐network or within‐region analysis in the motor network, and changes for between‐network or between‐region analyses for the salience network and the motor cortex. CONCLUSIONS Among military service members and Veterans with symptoms of traumatic stress, asymmetries of network and brain region connectivity patterns were identified prior to usage of HIRREM. A variety of changes in lateralized patterns of brain connectivity were identified postintervention. These laterality findings may inform future studies of brain connectivity in traumatic stress disorders, with potential to point to mechanisms of action for successful intervention.
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Affiliation(s)
- Dale E Dagenbach
- Department of Psychology, Wake Forest University, Winston-Salem, NC.,Laboratory for Complex Brain Networks, Wake Forest School of Medicine, Winston-Salem, NC
| | - Charles H Tegeler
- Department of Neurology, Wake Forest School of Medicine, Winston-Salem, NC
| | - Ashley R Morgan
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, NC
| | - Paul J Laurienti
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, NC.,Laboratory for Complex Brain Networks, Wake Forest School of Medicine, Winston-Salem, NC
| | | | - Sung W Lee
- College of Medicine, University of Arizona, Phoenix, AZ
| | - Lee Gerdes
- Brain State Technologies, Scottsdale, AZ
| | - Sean L Simpson
- Laboratory for Complex Brain Networks, Wake Forest School of Medicine, Winston-Salem, NC.,Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, NC
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16
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Asymmetry of turning behavior in rats is modulated by early life stress. Behav Brain Res 2020; 393:112807. [DOI: 10.1016/j.bbr.2020.112807] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/07/2020] [Accepted: 07/10/2020] [Indexed: 12/23/2022]
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17
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Le TP, Lucas HD, Schwartz EK, Mitchell KR, Cohen AS. Frontal alpha asymmetry in schizotypy: electrophysiological evidence for motivational dysfunction. Cogn Neuropsychiatry 2020; 25:371-386. [PMID: 32873177 DOI: 10.1080/13546805.2020.1813096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Introduction: Schizotypy is defined as personality traits reflecting an underlying risk for schizophrenia-spectrum disorders. As yet, there is a dearth of suitable objective markers for measuring schizotypy. Frontal alpha asymmetry, characterised by reduced left versus right frontal region activity, reflects trait-like diminished approach-related systems and has been found in schizophrenia. Methods: The present study used electroencephalography (EEG) recorded on a consumer-grade mobile headset to examine asymmetric resting-state frontal alpha, beta, and gamma power within the multidimensional schizotypy (e.g. positive, negative, disorganised) during a three-minute "eyes closed" resting period in college undergraduates (n=49). Results: Findings suggest that schizotypy was exclusively related to reduced left versus right-lateralised power in the alpha frequency (8.1-12.9 Hz., R2= .16). Follow-up analysis suggested that positive schizotypy was uniquely associated with increased right alpha activity, indicating increased withdrawal motivation. Conclusions: Frontal asymmetry is a possible ecologically valid objective marker for schizotypy that may be detectable using easily accessible, consumer-grade technology.
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Affiliation(s)
- Thanh P Le
- Department of Psychology, Louisiana State University, Baton Rouge, LA, USA
| | - Heather D Lucas
- Department of Psychology, Louisiana State University, Baton Rouge, LA, USA
| | - Elana K Schwartz
- Department of Psychology, Louisiana State University, Baton Rouge, LA, USA
| | - Kyle R Mitchell
- Desert Pacific Mental Illness Research, Education, and Clinical Center (MIRECC), La Jolla, CA, USA
| | - Alex S Cohen
- Department of Psychology, Louisiana State University, Baton Rouge, LA, USA
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Kim YW, Kim S, Shim M, Jin MJ, Jeon H, Lee SH, Im CH. Riemannian classifier enhances the accuracy of machine-learning-based diagnosis of PTSD using resting EEG. Prog Neuropsychopharmacol Biol Psychiatry 2020; 102:109960. [PMID: 32376342 DOI: 10.1016/j.pnpbp.2020.109960] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/19/2020] [Accepted: 04/30/2020] [Indexed: 12/14/2022]
Abstract
Recently, objective and automated methods for the diagnosis of post-traumatic stress disorder (PTSD) have attracted increasing attention. However, previous studies on machine-learning-based diagnosis of PTSD with resting-state electroencephalogram (EEG) have reported poor accuracies of as low as 60%. Here, a Riemannian geometry-based classifier, the Fisher geodesic minimum distance to the mean (FgMDM), was employed for PTSD classification for the first time. Eyes-closed resting-state EEG data of 39 healthy individuals and 42 PTSD patients were used for the analysis. EEG source activities in 148 cortical regions were parcellated based on the Destrieux atlas, and their covariances were evaluated for each individual. Thirty epochs of preprocessed EEG were employed to calculate source activities. In addition, the FgMDM approach was applied to each EEG source covariance to construct the classifier. For a comparison, linear discriminant analysis (LDA), support vector machine (SVM), and random forest (RF) classifiers employing source band powers and network features as feature candidates were also tested. The FgMDM classifier showed an average classification accuracy of 75.240.80%. In contrast, the maximum accuracies of LDA, SVM, and RF classifiers were 66.54 ± 2.99%, 61.11 ± 2.98%, and 60.99 ± 2.19%, respectively. Our study demonstrated that the diagnostic accuracy of PTSD with resting-state EEG could be significantly improved by employing the FgMDM framework, which is a type of Riemannian geometry-based classifier.
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Affiliation(s)
- Yong-Wook Kim
- Department of Biomedical Engineering, Hanyang University, Seoul, Republic of Korea; Clinical Emotion and Cognition Research Laboratory, Inje University, Goyang, Republic of Korea
| | - Sungkean Kim
- Department of Biomedical Engineering, Hanyang University, Seoul, Republic of Korea; Clinical Emotion and Cognition Research Laboratory, Inje University, Goyang, Republic of Korea
| | - Miseon Shim
- Department of Psychiatry, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Min Jin Jin
- Clinical Emotion and Cognition Research Laboratory, Inje University, Goyang, Republic of Korea; Department of psychology, Chung-Ang University, Seoul, Republic of Korea
| | - Hyeonjin Jeon
- Clinical Emotion and Cognition Research Laboratory, Inje University, Goyang, Republic of Korea
| | - Seung-Hwan Lee
- Clinical Emotion and Cognition Research Laboratory, Inje University, Goyang, Republic of Korea; Department of Psychiatry, Inje University, Ilsan-Paik Hospital, Goyang, Republic of Korea.
| | - Chang-Hwan Im
- Department of Biomedical Engineering, Hanyang University, Seoul, Republic of Korea.
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Silveira R, Prado RCR, Brietzke C, Coelho-Júnior HJ, Santos TM, Pires FO, Asano RY. Prefrontal cortex asymmetry and psychological responses to exercise: A systematic review. Physiol Behav 2019; 208:112580. [PMID: 31220517 DOI: 10.1016/j.physbeh.2019.112580] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/09/2019] [Accepted: 06/12/2019] [Indexed: 02/03/2023]
Abstract
BACKGROUND Studies have shown a relationship between prefrontal cortex (PFC) activation asymmetry and psychological responses to exercise, so that a higher rest activation in left rather than right PFC has been associated with positive psychological responses to exercise such as an improved affect, anxiety and multidimensional arousal states. PURPOSE To review: 1) evidence that PFC activation asymmetry before exercise is associated with psychological responses to exercise; 2) protocols of PFC asymmetry determination. METHODS A systematic review (SR) was performed on studies retrieved from the PubMed and Web of Science database up to 04-30-2019. Eligibility criteria were: 1) studies investigating participants submitted to aerobic exercises; 2) including cerebral activation measures through electroencephalography (EEG) before the exercise bout; 3) and psychological measures during or after the exercise bout; 4) original studies. RESULTS A number of 1901 studies was retrieved from the databases and 1 study was manually inserted. Thereafter, 1858 studies were excluded during the screening stage so that 30 studies remained for the SR. After full reading, 22 studies were excluded and 8 studies composed the final SR. Methodological assessment revealed that 62.5% of the studies showed a low risk of bias, while 34.37% and 3.12% showed either an unclear or a high risk of bias, respectively. Protocols of PFC activation asymmetry used EEG at F3-F4-P3-P4 (3 studies), F3-F4 (2 studies), F3-F4-T3-T4 (1 study), F3-F4-F7-F8-T5-T6-P3-P4 (1 study) and Fp1-Fp2-Fz-F3-F4-F7-F8-Cz-C3-C4-T3-T4-T5-T6-Pz-P3-P4-Oz-O1-O2 (1 study) positions. Most studies (75%) found a higher left PFC activation associated with a greater affect (n = 2), energetic arousal (n = 2), lower anxiety (n = 2) as well as calmness and tired arousal, simultaneously (n = 1). CONCLUSIONS Although the heterogeneity of PFC asymmetry protocols, reviewed studies showed a low risk of bias, suggesting that a higher left PFC activation is associated with a positive psychological response to exercise.
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Affiliation(s)
- Rodrigo Silveira
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Arlindo Béttio Avenue, 1000, Ermelino Matarazzo, São Paulo, Brazil.
| | - Raul Cosme Ramos Prado
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Arlindo Béttio Avenue, 1000, Ermelino Matarazzo, São Paulo, Brazil
| | - Cayque Brietzke
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Arlindo Béttio Avenue, 1000, Ermelino Matarazzo, São Paulo, Brazil
| | - Hélio José Coelho-Júnior
- Applied Kinesiology Laboratory, University of Campinas, Érico Veríssimo Avenue, 701, Barão Geraldo, Campinas, Brazil
| | - Tony Meireles Santos
- Performance and Health Research Center, Federal University of Pernambuco, Prof. Moraes Rego Avenue, 1235 - Cidade Universitária, Recife, Pernambuco, Brazil
| | - Flávio Oliveira Pires
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Arlindo Béttio Avenue, 1000, Ermelino Matarazzo, São Paulo, Brazil
| | - Ricardo Yukio Asano
- Exercise Psychophysiology Research Group, School of Arts, Sciences and Humanities, University of São Paulo, Arlindo Béttio Avenue, 1000, Ermelino Matarazzo, São Paulo, Brazil
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20
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Joshi SA, Duval ER, Kubat B, Liberzon I. A review of hippocampal activation in post-traumatic stress disorder. Psychophysiology 2019; 57:e13357. [PMID: 30829407 DOI: 10.1111/psyp.13357] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 01/22/2019] [Accepted: 02/05/2019] [Indexed: 01/15/2023]
Abstract
Post-traumatic stress disorder (PTSD) is often characterized by deficits in memory encoding and retrieval and aberrant fear and extinction learning. The hippocampus plays a critical role in memory and contextual processing and has been implicated in intrinsic functional connectivity networks involved in self-referential thought and memory-related processes. This review focuses on hippocampal activation findings during memory and fear and extinction learning tasks, as well as resting state hippocampal connectivity in individuals with PTSD. A preponderance of functional neuroimaging studies to date, using memory, fear learning, and extinction tasks, report decreased or "controls comparable" hippocampal activation in individuals with PTSD, which is usually associated with poorer performance on the task imaged. Existing evidence thus raises the possibility that greater hippocampal recruitment in PTSD participants may be required for similar performance levels. Studies of resting state functional connectivity in PTSD predominantly report reduced within-network connectivity in the default mode network (DMN), as well as greater coupling between the DMN and salience network (SN) via the hippocampus. Together, these findings suggest that deficient hippocampal activation in PTSD may be associated with poorer performance during memory, extinction recall, and fear renewal tasks. Furthermore, studies of resting state connectivity implicate the hippocampus in decreased within-network DMN connectivity and greater coupling with SN regions characteristic of PTSD.
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Affiliation(s)
- Sonalee A Joshi
- Department of Psychiatry, University of Michigan Health System, Ann Arbor, Michigan
| | - Elizabeth R Duval
- Department of Psychiatry, University of Michigan Health System, Ann Arbor, Michigan
| | - Bradley Kubat
- Department of Psychiatry, University of Michigan Health System, Ann Arbor, Michigan
| | - Israel Liberzon
- Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan.,Department of Psychiatry, Texas A&M University Health Science Center, College Station, Texas
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21
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Butt M, Espinal E, Aupperle RL, Nikulina V, Stewart JL. The Electrical Aftermath: Brain Signals of Posttraumatic Stress Disorder Filtered Through a Clinical Lens. Front Psychiatry 2019; 10:368. [PMID: 31214058 PMCID: PMC6555259 DOI: 10.3389/fpsyt.2019.00368] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022] Open
Abstract
This review aims to identify patterns of electrical signals identified using electroencephalography (EEG) linked to posttraumatic stress disorder (PTSD) diagnosis and symptom dimensions. We filter EEG findings through a clinical lens, evaluating nuances in findings according to study criteria and participant characteristics. Within the EEG frequency domain, greater right than left parietal asymmetry in alpha band power is the most promising marker of PTSD symptoms and is linked to exaggerated physiological arousal that may impair filtering of environmental distractors. The most consistent findings within the EEG time domain focused on event related potentials (ERPs) include: 1) exaggerated frontocentral responses (contingent negative variation, mismatch negativity, and P3a amplitudes) to task-irrelevant distractors, and 2) attenuated parietal responses (P3b amplitudes) to task-relevant target stimuli. These findings suggest that some individuals with PTSD suffer from attention dysregulation, which could contribute to problems concentrating on daily tasks and goals in lieu of threatening distractors. Future research investigating the utility of alpha asymmetry and frontoparietal ERPs as diagnostic and predictive biomarkers or intervention targets are recommended.
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Affiliation(s)
- Mamona Butt
- Department of Psychology, Queens College, City University of New York, Flushing, NY, United States
| | - Elizabeth Espinal
- Department of Psychology, Queens College, City University of New York, Flushing, NY, United States
| | - Robin L Aupperle
- Laureate Institute for Brain Research, Tulsa, OK, United States.,Department of Community Medicine, Oxley College of Health Sciences, University of Tulsa, Tulsa, OK, United States
| | - Valentina Nikulina
- Department of Psychology, Queens College, City University of New York, Flushing, NY, United States.,Department of Psychology, The Graduate Center, City University of New York, New York, NY, United States
| | - Jennifer L Stewart
- Laureate Institute for Brain Research, Tulsa, OK, United States.,Department of Community Medicine, Oxley College of Health Sciences, University of Tulsa, Tulsa, OK, United States
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22
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Emotional stress regulation: The role of relative frontal alpha asymmetry in shaping the stress response. Biol Psychol 2018; 138:231-239. [DOI: 10.1016/j.biopsycho.2018.08.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 08/07/2018] [Accepted: 08/07/2018] [Indexed: 02/08/2023]
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Abstract
Recent studies have shown that the states of high and low social power (the ability to control or influence another's thoughts, feelings, or behaviours) are related to left and right frontal hemisphere activity, respectively, suggesting a connection with two neurobiological motivational systems-the Behavioural Activation and Inhibition Systems. However, an important and outstanding question is which state of social power is associated with differences in hemispheric activity. In the current study, we addressed this outstanding issue by examining differences in frontal alpha asymmetry while participants engaged in an established episodic recall task, priming states of high, low, or neutral social power. Our results showed that it was the low social power state that was associated with hemispheric differences; that is, the low social power state was associated with significantly less left-frontal cortical activity relative to both the high and neutral social power states, while the latter two states did not differ. We discuss our results considering previous work on social power and the notion that different social power states are associated with different cognitive and behavioural tendencies.
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Affiliation(s)
- Carl Michael Galang
- a Social Brain, Body and Action Lab, Department of Psychology, Neuroscience and Behaviour , McMaster University , Hamilton , Ontario , Canada
| | - Sukhvinder S Obhi
- a Social Brain, Body and Action Lab, Department of Psychology, Neuroscience and Behaviour , McMaster University , Hamilton , Ontario , Canada
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Allen JJB, Keune PM, Schönenberg M, Nusslock R. Frontal EEG alpha asymmetry and emotion: From neural underpinnings and methodological considerations to psychopathology and social cognition. Psychophysiology 2018; 55. [PMID: 29243266 DOI: 10.1111/psyp.13028] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 10/06/2017] [Accepted: 10/07/2017] [Indexed: 12/18/2022]
Affiliation(s)
- John J B Allen
- Department of Psychology, University of Arizona, Tucson, Arizona, USA
| | - Philipp M Keune
- Klinikum Bayreuth GmbH, Department of Neurology, Bayreuth, Germany.,Department of Physiological Psychology, University of Bamberg, Bamberg, Germany
| | - Michael Schönenberg
- Department of Clinical Psychology and Psychotherapy, University of Tübingen, Tübingen, Germany
| | - Robin Nusslock
- Department of Psychology, Northwestern University, Evanston, Illinois, USA
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