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Mundorf A, Borawski J, Ocklenburg S. Behavioral lateralization in bipolar disorders: a systematic review. Int J Bipolar Disord 2023; 11:37. [PMID: 38038825 PMCID: PMC10692061 DOI: 10.1186/s40345-023-00320-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/21/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Bipolar disorder (BD) is often seen as a bridge between schizophrenia and depression in terms of symptomatology and etiology. Interestingly, hemispheric asymmetries as well as behavioral lateralization are shifted towards a tendency of left-side or mixed-side bias in schizophrenia whereas no shift is observed in subjects with depression. Given the role of BD with both, (hypo)manic and depressive episodes, investigating hemispheric asymmetries in subjects with BD is an interesting objective. METHOD A systematic review of studies including measures of behavioral lateralization in the form of handedness, footedness, eyedness, and language lateralization was performed resulting in 25 suitable studies. RESULTS A broad variety of methods was used to assess behavioral lateralization, especially for eyedness, footedness, and language lateralization hindering the integration of results. Additionally, for hand preference, studies frequently used different cut-off scores and classification systems. Overall, studies do not support alteration in side preference in BD subjects. Studies focusing on differences in handedness demonstrate that subjects show equal rates of right- and non-right-handedness as the general population. Few studies focusing on manic episodes point towards increased left-side bias in ear and eye dominance, but the small sample sizes and conflicting results warrant further investigation. CONCLUSION The results reinforce that some disorders, such as BD, should not be treated as a homogenous group but sub-groups should be analyzed within the patient's population. Particularly, clinical implications resulting from neuroimaging studies highlight the need to study hemispheric asymmetries given that they may be important to consider for brain stimulation protocols.
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Affiliation(s)
- Annakarina Mundorf
- ISM Institute for Systems Medicine and Department of Human Medicine, MSH Medical School Hamburg, Am Kaiserkai 1, 20457, Hamburg, Germany.
- Division of Cognitive Neuroscience, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Jette Borawski
- Department of Psychology, Medical School Hamburg, Hamburg, Germany
| | - Sebastian Ocklenburg
- Department of Psychology, Medical School Hamburg, Hamburg, Germany
- ICAN Institute for Cognitive and Affective Neuroscience, Medical School Hamburg, Hamburg, Germany
- Faculty of Psychology, Institute of Cognitive Neuroscience, Biopsychology, Ruhr University Bochum, Bochum, Germany
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Lorincz-Comi N, Yang Y, Li G, Zhu X. MRBEE: A novel bias-corrected multivariable Mendelian Randomization method. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.10.523480. [PMID: 37066391 PMCID: PMC10103949 DOI: 10.1101/2023.01.10.523480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Mendelian randomization (MR) is an instrumental variable approach used to infer causal relationships between exposures and outcomes and can apply to summary data from genome-wide association studies (GWAS). Since GWAS summary statistics are subject to estimation errors, most existing MR approaches suffer from measurement error bias, whose scale and direction are influenced by weak instrumental variables and GWAS sample overlap, respectively. We introduce MRBEE (MR using Bias-corrected Estimating Equation), a novel multivariable MR method capable of simultaneously removing measurement error bias and identifying horizontal pleiotropy. In simulations, we showed that MRBEE is capable of effectively removing measurement error bias in the presence of weak instrumental variables and sample overlap. In two independent real data analyses, we discovered that the causal effect of BMI on coronary artery disease risk is entirely mediated by blood pressure, and that existing MR methods may underestimate the causal effect of cannabis use disorder on schizophrenia risk compared to MRBEE. MRBEE possesses significant potential for advancing genetic research by providing a valuable tool to study causality between multiple risk factors and disease outcomes, particularly as a large number of GWAS summary statistics become publicly available.
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Affiliation(s)
- Noah Lorincz-Comi
- Department of Population and Quantitative Health Sciences, School of Medicine
- Case Western Reserve University, Cleveland, OH 44106, USA June 12, 2023
| | - Yihe Yang
- Department of Population and Quantitative Health Sciences, School of Medicine
- Case Western Reserve University, Cleveland, OH 44106, USA June 12, 2023
| | - Gen Li
- Department of Population and Quantitative Health Sciences, School of Medicine
- Case Western Reserve University, Cleveland, OH 44106, USA June 12, 2023
| | - Xiaofeng Zhu
- This work was supported by grant HG011052 (to X.Z.) from the National Human Genome Research Institute (NHGRI), USA.
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Mallet J, Godin O, Mazer N, Le Strat Y, Bellivier F, Belzeaux R, Etain B, Fond G, Gard S, Henry C, Leboyer M, Llorca PM, Loftus J, Olié E, Passerieux C, Polosan M, Schwan R, Roux P, Dubertret C. Handedness in bipolar disorders is associated with specific neurodevelopmental features: results of the BD-FACE cohort. Eur Arch Psychiatry Clin Neurosci 2022; 272:827-838. [PMID: 34374842 DOI: 10.1007/s00406-021-01314-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 07/26/2021] [Indexed: 11/26/2022]
Abstract
OBJECTIVES High rates of non-right-handedness (NRH) and mixed-handedness exist in neurodevelopmental disorders. Dysfunctional neurodevelopmental pathways may be implicated in the underlying pathophysiology of bipolar disorders (BD), at least in some subgroups. Yet little is known about correlates of NRH and mixed-handedness in BD. The objectives of this national study are to determine (i) the prevalence of NRH and mixed-handedness in a well-stabilized sample of BD individuals; (ii) if NRH/mixed-handedness in BD is associated with a different clinical, biological and neurocognitive profile. METHODS We included 2174 stabilized individuals. Participants were tested with a comprehensive battery of neuropsychological tests. Handedness was assessed using a single oral question. Learning and/or language disorders and obstetrical complications were recorded using childhood records. Common environmental, clinical and biological parameters were assessed. RESULTS The prevalence of NRH and mixed-handedness were, respectively, 11.6 and 2.4%. Learning/language disorders were found in 9.7% out of the total sample and were associated with atypical handedness (only dyslexia for mixed-handedness (p < 0.01), and dyslexia and dysphasia for NRH (p = 0.01 and p = 0.04, respectively). In multivariate analyses, NRH was associated with a younger age of BD onset (aOR 0.98 (95% CI 0.96-0.99) and lifetime substance use disorder (aOR 1.40 (95% CI 1.03-1.82) but not with any of the cognitive subtasks. Mixed-handedness was associated in univariate analyses with lifetime substance use disorder, lifetime cannabis use disorder (all p < 0.01) and less mood stabilizer prescription (p = 0.028). No association was found between NRH or mixed-handedness and the following parameters: trauma history, obstetrical complications, prior psychotic symptoms, bipolar subtype, attention deficit/hyperactivity disorder, peripheral inflammation or body mass index. CONCLUSIONS Handedness may be associated with specific features in BD, possibly reflecting a specific subgroup with a neurodevelopmental load.
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Affiliation(s)
- Jasmina Mallet
- Fondation Fondamental, Créteil, France.
- Faculté de médecine, AP-HP, Department of Psychiatry, Université de Paris, Louis Mourier Hospital, CHU Louis Mourier, 178 rue des Renouillers, 92700, Colombes, France.
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, University Paris Descartes, Paris, France.
| | - Ophélia Godin
- Fondation Fondamental, Créteil, France
- UMR_S955, UPEC, Créteil, France Inserm, Université Paris-Est, U955, Equipe 15 Psychiatrie génétique, Créteil, France
- AP-HP, Hôpital H. Mondor-A. Chenevier, Pôle de psychiatrie, Créteil, France
| | - Nicolas Mazer
- Fondation Fondamental, Créteil, France
- Faculté de médecine, AP-HP, Department of Psychiatry, Université de Paris, Louis Mourier Hospital, CHU Louis Mourier, 178 rue des Renouillers, 92700, Colombes, France
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, University Paris Descartes, Paris, France
| | - Yann Le Strat
- Fondation Fondamental, Créteil, France
- Faculté de médecine, AP-HP, Department of Psychiatry, Université de Paris, Louis Mourier Hospital, CHU Louis Mourier, 178 rue des Renouillers, 92700, Colombes, France
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, University Paris Descartes, Paris, France
| | - Frank Bellivier
- Fondation Fondamental, Créteil, France
- AP-HP, GH Saint-Louis-Lariboisière-Fernand Widal, Pôle Neurosciences Tête et Cou, INSERM UMRS 1144, University Paris Diderot, Paris, France
| | - Raoul Belzeaux
- Fondation Fondamental, Créteil, France
- AP-HM, Department of Psychiatry, Marseille, France
- INT-UMR7289, CNRS Aix Marseille University, Marseille, France
| | - Bruno Etain
- Fondation Fondamental, Créteil, France
- AP-HP, GH Saint-Louis-Lariboisière-Fernand Widal, Pôle Neurosciences Tête et Cou, INSERM UMRS 1144, University Paris Diderot, Paris, France
| | - Guillaume Fond
- Fondation Fondamental, Créteil, France
- AP-HM, Aix-Marseille University, School of Medicine-La Timone Medical Campus, EA 3279: CEReSS-Health Service Research and Quality of Life Center, 27 Boulevard Jean Moulin, 13005, Marseille, France
| | - Sébastien Gard
- Fondation Fondamental, Créteil, France
- Centre Expert Troubles Bipolaires, Service de Psychiatrie Adulte, Hôpital Charles-Perrens, Bordeaux, France
| | - Chantal Henry
- Fondation Fondamental, Créteil, France
- Department of Psychiatry, Service Hospitalo-Universitaire, GHU Paris Psychiatrie and Neurosciences, 75014, Paris, France
| | - Marion Leboyer
- Fondation Fondamental, Créteil, France
- UMR_S955, UPEC, Créteil, France Inserm, Université Paris-Est, U955, Equipe 15 Psychiatrie génétique, Créteil, France
- AP-HP, Hôpital H. Mondor-A. Chenevier, Pôle de psychiatrie, Créteil, France
- Fondation de Cooperation Scientifique, Fondation FondaMental, Créteil, France
| | - Pierre-Michel Llorca
- Fondation Fondamental, Créteil, France
- CHU Clermont-Ferrand, Department of Psychiatry, University of Clermont Auvergne, EA 7280, Clermont-Ferrand, France
| | - Joséphine Loftus
- Fondation Fondamental, Créteil, France
- Pôle de Psychiatrie, Centre Hospitalier Princesse Grace, Monaco, France
| | - Emilie Olié
- Fondation Fondamental, Créteil, France
- Department of Emergency Psychiatry and Acute Care, CHU Montpellier, INSERM U1061, Montpellier University, Montpellier, France
| | - Christine Passerieux
- Fondation Fondamental, Créteil, France
- Service Universitaire de Psychiatrie d'Adultes et d'Addictologie, Centre Hospitalier de Versailles, 177 rue de Versailles, 78157, Le Chesnay, France
- CESP, INSERM, Université Paris Saclay, Université de Versailles Saint-Quentin-En-Yvelines, 2 Avenue de la Source de la Bièvre, 78180, Montigny-le-Bretonneux, France
| | - Mircea Polosan
- Fondation Fondamental, Créteil, France
- Université Grenoble Alpes, Inserm, U1216, Grenoble Institut des Neurosciences, CHU Grenoble Alpes, 38000, Grenoble, France
| | - Raymund Schwan
- Faculté de médecine, AP-HP, Department of Psychiatry, Université de Paris, Louis Mourier Hospital, CHU Louis Mourier, 178 rue des Renouillers, 92700, Colombes, France
- CHRU de Nancy et Pôle de Psychiatrie et Psychologie Clinique, Université de Lorraine, Centre Psychothérapique de Nancy, Nancy, France
| | - Paul Roux
- Fondation Fondamental, Créteil, France
- Service Universitaire de Psychiatrie d'Adultes et d'Addictologie, Centre Hospitalier de Versailles, 177 rue de Versailles, 78157, Le Chesnay, France
- CESP, INSERM, Université Paris Saclay, Université de Versailles Saint-Quentin-En-Yvelines, 2 Avenue de la Source de la Bièvre, 78180, Montigny-le-Bretonneux, France
| | - Caroline Dubertret
- Fondation Fondamental, Créteil, France
- Faculté de médecine, AP-HP, Department of Psychiatry, Université de Paris, Louis Mourier Hospital, CHU Louis Mourier, 178 rue des Renouillers, 92700, Colombes, France
- INSERM UMR1266, Institute of Psychiatry and Neuroscience of Paris, University Paris Descartes, Paris, France
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Antipsychotic effects of sex hormones and atypical hemispheric asymmetries. Cortex 2020; 127:313-332. [DOI: 10.1016/j.cortex.2020.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 02/27/2020] [Accepted: 02/29/2020] [Indexed: 12/16/2022]
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Atypical lateralization in neurodevelopmental and psychiatric disorders: What is the role of stress? Cortex 2020; 125:215-232. [PMID: 32035318 DOI: 10.1016/j.cortex.2019.12.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/07/2019] [Accepted: 12/23/2019] [Indexed: 02/08/2023]
Abstract
Hemispheric asymmetries are a major organizational principle of the human brain. In different neurodevelopmental and psychiatric disorders, like schizophrenia, autism spectrum disorders, depression, dyslexia and posttraumatic stress disorder, functional and/or structural hemispheric asymmetries are altered compared to healthy controls. The question, why these disorders all share the common characteristic of altered hemispheric asymmetries despite vastly different etiologies and symptoms remains one of the unsolved mysteries of laterality research. This review is aimed at reviewing potential reasons for why atypical lateralization is so common in many neurodevelopmental and psychiatric disorders. To this end, we review the evidence for overlaps in the genetic and non-genetic factors involved in the ontogenesis of different disorders and hemispheric asymmetries. While there is evidence for genetic overlap between different disorders, only few asymmetry-related loci have also been linked to disorders and importantly, those effects are mostly specific to single disorders. However, there is evidence for shared non-genetic influences between disorders and hemispheric asymmetries. Most neurodevelopmental and psychiatric disorders show alterations in the hypothalamic-pituitary adrenocortical (HPA) axis and maternal as well as early life stress have been implicated in their etiology. Stress has also been suggested to affect hemispheric asymmetries. We propose a model in which early life stress as well as chronic stress not only increases the risk for psychiatric and neurodevelopmental disorders but also changes structural and functional hemispheric asymmetries leading to the aberrant lateralization patterns seen in these disorders. Thus, pathology-related changes in hemispheric asymmetries are not a factor causing disorders, but rather a different phenotype that is affected by partly overlapping ontogenetic factors, primarily stress.
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6
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Schmitz J, Fraenz C, Schlüter C, Friedrich P, Kumsta R, Moser D, Güntürkün O, Genç E, Ocklenburg S. Schizotypy and altered hemispheric asymmetries: The role of cilia genes. Psychiatry Res Neuroimaging 2019; 294:110991. [PMID: 31683112 DOI: 10.1016/j.pscychresns.2019.110991] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 10/22/2019] [Accepted: 10/23/2019] [Indexed: 12/27/2022]
Abstract
Schizophrenia patients have a higher probability of altered structural and functional differences between the left and right hemisphere. Schizotypy as its nonclinical manifestation has been related to a higher incidence of non-right-handedness and atypical right-hemispheric language dominance. It has been suggested that genes involved in cilia function might link brain asymmetry and neurodevelopmental disorders. We assessed DNA methylation in the promoter regions of seven candidate genes involved in cilia function and psychiatric disorders from buccal cells and investigated their association with schizotypy and language lateralization in 60 healthy adults. Moreover, we determined microstructural properties of the planum temporale in a subsample of 52 subjects using neurite orientation dispersion and density imaging (NODDI). We found a significant association between schizotypy and DNA methylation in the AHI1 promoter region. Moreover, AHI1 DNA methylation significantly predicted language lateralization and asymmetry in estimated planum temporale neurite density. Finally, stronger leftward asymmetry in estimated neurite density was associated with a more pronounced right ear advantage (left hemisphere dominance) in the forced-right condition of the dichotic listening task, measuring attentional modulation of language lateralization. Our results are in line with a shared molecular basis of schizotypy and functional hemispheric asymmetries that is based on cilia function.
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Affiliation(s)
- Judith Schmitz
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany.
| | - Christoph Fraenz
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
| | - Caroline Schlüter
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
| | - Patrick Friedrich
- Brain Connectivity and Behaviour Laboratory (BCBLab), Sorbonne Universities, Paris, France; Groupe d'Imagerie Neurofonctionnelle (GIN), Institut des Maladies Neurodégénératives-UMR 5293, CNRS, CEA University of Bordeaux, Bordeaux, France
| | - Robert Kumsta
- Genetic Psychology, Department of Psychology, Ruhr University, Bochum, Germany
| | - Dirk Moser
- Genetic Psychology, Department of Psychology, Ruhr University, Bochum, Germany
| | - Onur Güntürkün
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
| | - Erhan Genç
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
| | - Sebastian Ocklenburg
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
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7
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Fanella M, Frascarelli M, Lambiase C, Morano A, Unolt M, Liberati N, Fattouch J, Buzzanca A, Accinni T, Ceccanti M, Viganò A, Biondi M, Colonnese C, Giallonardo AT, Di Fabio F, Pizzuti A, Di Bonaventura C, Berardelli A. Myoclonic epilepsy, parkinsonism, schizophrenia and left-handedness as common neuropsychiatric features in 22q11.2 deletion syndrome. J Med Genet 2019; 57:151-159. [PMID: 31506323 DOI: 10.1136/jmedgenet-2019-106223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/08/2019] [Accepted: 08/10/2019] [Indexed: 11/04/2022]
Abstract
BACKGROUND 22q11.2 deletion syndrome (22q11.2DS) is considered as the genetic model of schizophrenia. However, its polymorphic nature has led researchers to further investigate its neuropsychiatric manifestations. METHODS We enrolled 56 adults (38 men, 18 women) diagnosed with 22q11.2DS. All subjects were evaluated by a multidisciplinary team. The neuropsychiatric features were investigated by means of clinical and neurophysiological evaluation (video-EEG). RESULTS Thirty per cent of our patients were left-handed. Fifty-eight per cent had a low IQ, and 22 of 56 subjects had psychotic disorders (13 of 22 with schizophrenia). Eighteen patients reported at least one seizure in their lifetime, and ten were diagnosed with epilepsy; among them, seven had genetic generalised epilepsy (GGE), and five of seven showed features suggestive of juvenile myoclonic epilepsy (JME). Video-EEG recordings revealed generalised epileptiform abnormalities in 24 of 56 cases. Besides, only one patient with epilepsy had a cardiac malformation. Lastly, 31 of 56 subjects presented with parkinsonism, 16 of whom were taking neuroleptics. None of the 15 patients with parkinsonism not related to neuroleptic therapy was diagnosed with epilepsy, compared with 6 of those taking antipsychotics. CONCLUSIONS 22q11.2DS is characterised by left-handedness and neuropsychiatric features such as cognitive impairment, schizophrenia, epilepsy and parkinsonism. GGE, mostly the JME phenotype, is the predominant epilepsy type. The significant association between 22q11.2DS and parkinsonian features confirms these patients' genetic susceptibility to parkinsonism. Despite the lack of any conclusive evidence, our study suggests a possible relationship between the analysed clinical variables: (1) an inverse correlation between low IQ/psychosis/epilepsy and major cardiac diseases; (2) a direct association between psychosis and both mental delay and epilepsy; and (3) an inverse correlation between parkinsonism and epilepsy.
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Affiliation(s)
- Martina Fanella
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | | | | | - Alessandra Morano
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Marta Unolt
- Department of Pediatrics, Sapienza University of Rome, Rome, Italy
| | | | - Jinane Fattouch
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Antonino Buzzanca
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Tommaso Accinni
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Marco Ceccanti
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Alessandro Viganò
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Massimo Biondi
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Claudio Colonnese
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy.,IRCCS "Neuromed", Pozzilli (IS), Italy
| | | | - Fabio Di Fabio
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy
| | - Antonio Pizzuti
- Experimental Medicine, Universita 'La Sapienza', Rome, Italy
| | | | - Alfredo Berardelli
- Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy.,IRCCS "Neuromed", Pozzilli (IS), Italy
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Schmitz J, Güntürkün O, Ocklenburg S. Building an Asymmetrical Brain: The Molecular Perspective. Front Psychol 2019; 10:982. [PMID: 31133928 PMCID: PMC6524718 DOI: 10.3389/fpsyg.2019.00982] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 04/15/2019] [Indexed: 12/17/2022] Open
Abstract
The brain is one of the most prominent examples for structural and functional differences between the left and right half of the body. For handedness and language lateralization, the most widely investigated behavioral phenotypes, only a small fraction of phenotypic variance has been explained by molecular genetic studies. Due to environmental factors presumably also playing a role in their ontogenesis and based on first molecular evidence, it has been suggested that functional hemispheric asymmetries are partly under epigenetic control. This review article aims to elucidate the molecular factors underlying hemispheric asymmetries and their association with inner organ asymmetries. While we previously suggested that epigenetic mechanisms might partly account for the missing heritability of handedness, this article extends this idea by suggesting possible alternatives for transgenerational transmission of epigenetic states that do not require germ line epigenetic transmission. This is in line with a multifactorial model of hemispheric asymmetries, integrating genetic, environmental, and epigenetic influencing factors in their ontogenesis.
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Affiliation(s)
- Judith Schmitz
- Biopsychology, Department of Psychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany
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9
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de Kovel CGF, Francks C. The molecular genetics of hand preference revisited. Sci Rep 2019; 9:5986. [PMID: 30980028 PMCID: PMC6461639 DOI: 10.1038/s41598-019-42515-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/27/2019] [Indexed: 01/04/2023] Open
Abstract
Hand preference is a prominent behavioural trait linked to human brain asymmetry. A handful of genetic variants have been reported to associate with hand preference or quantitative measures related to it. Most of these reports were on the basis of limited sample sizes, by current standards for genetic analysis of complex traits. Here we performed a genome-wide association analysis of hand preference in the large, population-based UK Biobank cohort (N = 331,037). We used gene-set enrichment analysis to investigate whether genes involved in visceral asymmetry are particularly relevant to hand preference, following one previous report. We found no evidence supporting any of the previously suggested variants or genes, nor that genes involved in visceral laterality have a role in hand preference. It remains possible that some of the previously reported genes or pathways are relevant to hand preference as assessed in other ways, or else are relevant within specific disorder populations. However, some or all of the earlier findings are likely to be false positives, and none of them appear relevant to hand preference as defined categorically in the general population. Our analysis did produce a small number of novel, significant associations, including one implicating the microtubule-associated gene MAP2 in handedness.
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Affiliation(s)
- Carolien G F de Kovel
- Department of Language & Genetics, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands
| | - Clyde Francks
- Department of Language & Genetics, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
- Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands.
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Papadatou-Pastou M. Handedness and cognitive ability: Using meta-analysis to make sense of the data. PROGRESS IN BRAIN RESEARCH 2018; 238:179-206. [DOI: 10.1016/bs.pbr.2018.06.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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Ntolka E, Papadatou-Pastou M. Right-handers have negligibly higher IQ scores than left-handers: Systematic review and meta-analyses. Neurosci Biobehav Rev 2018; 84:376-393. [DOI: 10.1016/j.neubiorev.2017.08.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 01/03/2023]
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12
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Schmitz J, Metz GA, Güntürkün O, Ocklenburg S. Beyond the genome—Towards an epigenetic understanding of handedness ontogenesis. Prog Neurobiol 2017; 159:69-89. [DOI: 10.1016/j.pneurobio.2017.10.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 09/18/2017] [Accepted: 10/26/2017] [Indexed: 12/13/2022]
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13
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Schmitz J, Kumsta R, Moser D, Güntürkün O, Ocklenburg S. DNA methylation in candidate genes for handedness predicts handedness direction. Laterality 2017; 23:441-461. [DOI: 10.1080/1357650x.2017.1377726] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Judith Schmitz
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
| | - Robert Kumsta
- Genetic Psychology, Department of Psychology, Ruhr University, Bochum, Germany
| | - Dirk Moser
- Genetic Psychology, Department of Psychology, Ruhr University, Bochum, Germany
| | - Onur Güntürkün
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
- Stellenbosch Institute for Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University, Stellenbosch, South Africa
| | - Sebastian Ocklenburg
- Biopsychology, Institute of Cognitive Neuroscience, Department of Psychology, Ruhr University, Bochum, Germany
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Schmitz J, Lor S, Klose R, Güntürkün O, Ocklenburg S. The Functional Genetics of Handedness and Language Lateralization: Insights from Gene Ontology, Pathway and Disease Association Analyses. Front Psychol 2017; 8:1144. [PMID: 28729848 PMCID: PMC5498560 DOI: 10.3389/fpsyg.2017.01144] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 06/22/2017] [Indexed: 11/25/2022] Open
Abstract
Handedness and language lateralization are partially determined by genetic influences. It has been estimated that at least 40 (and potentially more) possibly interacting genes may influence the ontogenesis of hemispheric asymmetries. Recently, it has been suggested that analyzing the genetics of hemispheric asymmetries on the level of gene ontology sets, rather than at the level of individual genes, might be more informative for understanding the underlying functional cascades. Here, we performed gene ontology, pathway and disease association analyses on genes that have previously been associated with handedness and language lateralization. Significant gene ontology sets for handedness were anatomical structure development, pattern specification (especially asymmetry formation) and biological regulation. Pathway analysis highlighted the importance of the TGF-beta signaling pathway for handedness ontogenesis. Significant gene ontology sets for language lateralization were responses to different stimuli, nervous system development, transport, signaling, and biological regulation. Despite the fact that some authors assume that handedness and language lateralization share a common ontogenetic basis, gene ontology sets barely overlap between phenotypes. Compared to genes involved in handedness, which mostly contribute to structural development, genes involved in language lateralization rather contribute to activity-dependent cognitive processes. Disease association analysis revealed associations of genes involved in handedness with diseases affecting the whole body, while genes involved in language lateralization were specifically engaged in mental and neurological diseases. These findings further support the idea that handedness and language lateralization are ontogenetically independent, complex phenotypes.
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Affiliation(s)
- Judith Schmitz
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University BochumBochum, Germany
| | - Stephanie Lor
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University BochumBochum, Germany
| | - Rena Klose
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University BochumBochum, Germany
| | - Onur Güntürkün
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University BochumBochum, Germany
| | - Sebastian Ocklenburg
- Department of Biopsychology, Institute of Cognitive Neuroscience, Faculty of Psychology, Ruhr-University BochumBochum, Germany
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Ravichandran C, Shinn AK, Öngür D, Perlis RH, Cohen B. Frequency of non-right-handedness in bipolar disorder and schizophrenia. Psychiatry Res 2017; 253:267-269. [PMID: 28411573 PMCID: PMC5510165 DOI: 10.1016/j.psychres.2017.04.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 04/03/2017] [Accepted: 04/03/2017] [Indexed: 11/19/2022]
Abstract
Increased non-right-handedness (NRH) probably reflects neurodevelopmental abnormalities in psychiatric disorders. Past studies of NRH have focused more on schizophrenia (SZ) than bipolar disorder (BPD). We report results on NRH in two large studies. In (1), NRH was compared among BPD patients with psychosis, SZ patients, and healthy controls (HC). NRH was elevated in BPD with psychosis and SZ patients relative to HC, but not SZ relative to BPD. In (2), NRH was compared between BPD patients with and without psychosis. NRH was similarly elevated in both. The findings suggest that NRH may reflect shared brain anomalies in SZ and BPD.
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Affiliation(s)
- Caitlin Ravichandran
- Program for Neuropsychiatric Research, McLean Hospital, 115 Mill Street, Belmont, MA, USA; Lurie Center for Autism, Massachusetts General Hospital for Children, 55 Fruit Street, Boston, MA, USA; Harvard Medical School, Department of Psychiatry, 25 Shattuck Street, Boston, MA, USA.
| | - Ann K Shinn
- Harvard Medical School, Department of Psychiatry, 25 Shattuck Street, Boston, MA, USA; Psychotic Disorders Division, McLean Hospital, 115 Mill Street, Belmont, MA, USA
| | - Dost Öngür
- Program for Neuropsychiatric Research, McLean Hospital, 115 Mill Street, Belmont, MA, USA; Harvard Medical School, Department of Psychiatry, 25 Shattuck Street, Boston, MA, USA; Psychotic Disorders Division, McLean Hospital, 115 Mill Street, Belmont, MA, USA
| | - Roy H Perlis
- Harvard Medical School, Department of Psychiatry, 25 Shattuck Street, Boston, MA, USA; Center for Experimental Drugs and Diagnostics, Center for Human Genetic Research, Massachusetts General Hospital, 55 Fruit Street, Boston, MA, USA
| | - Bruce Cohen
- Program for Neuropsychiatric Research, McLean Hospital, 115 Mill Street, Belmont, MA, USA; Harvard Medical School, Department of Psychiatry, 25 Shattuck Street, Boston, MA, USA; Psychotic Disorders Division, McLean Hospital, 115 Mill Street, Belmont, MA, USA
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Ocklenburg S, Schmitz J, Moinfar Z, Moser D, Klose R, Lor S, Kunz G, Tegenthoff M, Faustmann P, Francks C, Epplen JT, Kumsta R, Güntürkün O. Epigenetic regulation of lateralized fetal spinal gene expression underlies hemispheric asymmetries. eLife 2017; 6. [PMID: 28145864 PMCID: PMC5295814 DOI: 10.7554/elife.22784] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 01/31/2017] [Indexed: 12/11/2022] Open
Abstract
Lateralization is a fundamental principle of nervous system organization but its molecular determinants are mostly unknown. In humans, asymmetric gene expression in the fetal cortex has been suggested as the molecular basis of handedness. However, human fetuses already show considerable asymmetries in arm movements before the motor cortex is functionally linked to the spinal cord, making it more likely that spinal gene expression asymmetries form the molecular basis of handedness. We analyzed genome-wide mRNA expression and DNA methylation in cervical and anterior thoracal spinal cord segments of five human fetuses and show development-dependent gene expression asymmetries. These gene expression asymmetries were epigenetically regulated by miRNA expression asymmetries in the TGF-β signaling pathway and lateralized methylation of CpG islands. Our findings suggest that molecular mechanisms for epigenetic regulation within the spinal cord constitute the starting point for handedness, implying a fundamental shift in our understanding of the ontogenesis of hemispheric asymmetries in humans. DOI:http://dx.doi.org/10.7554/eLife.22784.001
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Affiliation(s)
- Sebastian Ocklenburg
- Institute of Cognitive Neuroscience, Department Biopsychology, Ruhr University Bochum, Bochum, Germany
| | - Judith Schmitz
- Institute of Cognitive Neuroscience, Department Biopsychology, Ruhr University Bochum, Bochum, Germany
| | - Zahra Moinfar
- Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum, Bochum, Germany
| | - Dirk Moser
- Department of Genetic Psychology, Ruhr University Bochum, Bochum, Germany
| | - Rena Klose
- Institute of Cognitive Neuroscience, Department Biopsychology, Ruhr University Bochum, Bochum, Germany
| | - Stephanie Lor
- Institute of Cognitive Neuroscience, Department Biopsychology, Ruhr University Bochum, Bochum, Germany
| | - Georg Kunz
- Department of Obstetrics and Gynecology, St. Johannes Hospital, Dortmund, Germany
| | - Martin Tegenthoff
- Department of Neurology, University Hospital Bergmannsheil, Bochum, Germany
| | - Pedro Faustmann
- Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum, Bochum, Germany
| | - Clyde Francks
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Netherlands
| | - Jörg T Epplen
- Department of Human Genetics, Ruhr University Bochum, Bochum, Germany
| | - Robert Kumsta
- Department of Genetic Psychology, Ruhr University Bochum, Bochum, Germany
| | - Onur Güntürkün
- Institute of Cognitive Neuroscience, Department Biopsychology, Ruhr University Bochum, Bochum, Germany.,Stellenbosch Institute for Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University, Stellenbosch, South Africa
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Atagun MI, Balaban OD, Yesilbas D, Keskinkilic C, Evren C. Effect of Lateralization on Motor and Mental Speed in Bipolar Disorder. ACTA ACUST UNITED AC 2016. [DOI: 10.5455/bcp.20120827114812] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Murat Ilhan Atagun
- Namık Kemal University Medical School, Department of Psychiatry, Tekirdağ - Turkey
| | - Ozlem Devrim Balaban
- Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, İstanbul - Turkey
| | - Dilek Yesilbas
- Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, İstanbul - Turkey
| | - Cahit Keskinkilic
- Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, İstanbul - Turkey
| | - Cuneyt Evren
- Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, İstanbul - Turkey
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Motofei IG, Rowland DL, Georgescu SR, Tampa M, Baconi D, Stefanescu E, Baleanu BC, Balalau C, Constantin V, Paunica S. Finasteride adverse effects in subjects with androgenic alopecia: A possible therapeutic approach according to the lateralization process of the brain. J DERMATOL TREAT 2016; 27:495-497. [DOI: 10.3109/09546634.2016.1161155] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ocklenburg S, Güntürkün O, Hugdahl K, Hirnstein M. Laterality and mental disorders in the postgenomic age – A closer look at schizophrenia and language lateralization. Neurosci Biobehav Rev 2015; 59:100-10. [DOI: 10.1016/j.neubiorev.2015.08.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 07/08/2015] [Accepted: 08/31/2015] [Indexed: 01/15/2023]
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Papadatou-Pastou M, Tomprou DM. Intelligence and handedness: Meta-analyses of studies on intellectually disabled, typically developing, and gifted individuals. Neurosci Biobehav Rev 2015; 56:151-65. [DOI: 10.1016/j.neubiorev.2015.06.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 06/06/2015] [Accepted: 06/19/2015] [Indexed: 12/22/2022]
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The ontogenesis of language lateralization and its relation to handedness. Neurosci Biobehav Rev 2014; 43:191-8. [DOI: 10.1016/j.neubiorev.2014.04.008] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 04/05/2014] [Accepted: 04/15/2014] [Indexed: 01/23/2023]
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22
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Guadalupe T, Willems RM, Zwiers MP, Arias Vasquez A, Hoogman M, Hagoort P, Fernandez G, Buitelaar J, Franke B, Fisher SE, Francks C. Differences in cerebral cortical anatomy of left- and right-handers. Front Psychol 2014; 5:261. [PMID: 24734025 PMCID: PMC3975119 DOI: 10.3389/fpsyg.2014.00261] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/11/2014] [Indexed: 11/17/2022] Open
Abstract
The left and right sides of the human brain are specialized for different kinds of information processing, and much of our cognition is lateralized to an extent toward one side or the other. Handedness is a reflection of nervous system lateralization. Roughly ten percent of people are mixed- or left-handed, and they show an elevated rate of reductions or reversals of some cerebral functional asymmetries compared to right-handers. Brain anatomical correlates of left-handedness have also been suggested. However, the relationships of left-handedness to brain structure and function remain far from clear. We carried out a comprehensive analysis of cortical surface area differences between 106 left-handed subjects and 1960 right-handed subjects, measured using an automated method of regional parcellation (FreeSurfer, Destrieux atlas). This is the largest study sample that has so far been used in relation to this issue. No individual cortical region showed an association with left-handedness that survived statistical correction for multiple testing, although there was a nominally significant association with the surface area of a previously implicated region: the left precentral sulcus. Identifying brain structural correlates of handedness may prove useful for genetic studies of cerebral asymmetries, as well as providing new avenues for the study of relations between handedness, cerebral lateralization and cognition.
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Affiliation(s)
- Tulio Guadalupe
- Language and Genetics Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands ; International Max Planck Research School for Language Sciences Nijmegen, Netherlands
| | - Roel M Willems
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Nijmegen, Netherlands ; Neurobiology of Language Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands
| | - Marcel P Zwiers
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Nijmegen, Netherlands
| | - Alejandro Arias Vasquez
- Department of Human Genetics, Radboud University Medical Center Nijmegen, Netherlands ; Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands ; Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands
| | - Martine Hoogman
- Language and Genetics Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands ; Department of Human Genetics, Radboud University Medical Center Nijmegen, Netherlands
| | - Peter Hagoort
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Nijmegen, Netherlands ; Neurobiology of Language Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands
| | - Guillen Fernandez
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Nijmegen, Netherlands ; Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands
| | - Jan Buitelaar
- Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands ; Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands
| | - Barbara Franke
- Department of Human Genetics, Radboud University Medical Center Nijmegen, Netherlands ; Department of Psychiatry, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands ; Department of Cognitive Neuroscience, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center Nijmegen, Netherlands
| | - Simon E Fisher
- Language and Genetics Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands ; Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Nijmegen, Netherlands
| | - Clyde Francks
- Language and Genetics Department, Max Planck Institute for Psycholinguistics Nijmegen, Netherlands ; Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen Nijmegen, Netherlands
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Handedness: A neurogenetic shift of perspective. Neurosci Biobehav Rev 2013; 37:2788-93. [DOI: 10.1016/j.neubiorev.2013.09.014] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 09/16/2013] [Accepted: 09/24/2013] [Indexed: 02/01/2023]
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Florio V, Savazzi S, Conca A, Marzi CA. Differential impairment of interhemispheric transmission in bipolar disease. Exp Brain Res 2013; 230:175-85. [DOI: 10.1007/s00221-013-3642-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 06/30/2013] [Indexed: 01/02/2023]
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Schenkel LS, West AE, Jacobs R, Sweeney JA, Pavuluri MN. Cognitive dysfunction is worse among pediatric patients with bipolar disorder Type I than Type II. J Child Psychol Psychiatry 2012; 53:775-81. [PMID: 22339488 PMCID: PMC3415381 DOI: 10.1111/j.1469-7610.2011.02519.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Impaired profiles of neurocognitive function have been consistently demonstrated among pediatric patients with bipolar disorder (BD), and may aid in the identification of endophenotypes across subtypes of the disorder. This study aims to determine phenotypic cognitive profiles of patients with BD Type I and II. METHODS Subjects (N = 79) consisted of BD I (n = 27) and BD II (n = 19) patients and demographic and intellectually matched healthy controls (HC; n = 33) that completed a battery of neurocognitive tasks. RESULTS Bipolar disorder Type I patients performed significantly more poorly compared to HC on all domains of cognitive function including attention, executive function, working memory, visual memory, and verbal learning and memory. BD I patients also performed more poorly compared to BD II patients on all domains of cognitive functioning with the exception of working memory, whereas BD II patients did poorly relative to HC only on verbal learning and memory. CONCLUSIONS Findings from the current study indicate that BD I patients are characterized by more severe cognitive impairment relative to BD II patients who show an intermediate pattern of performance between BD I patients and HC. Verbal learning and memory may effectively differentiate pediatric BD patients and controls, regardless of the subtype of BD, and may serve as a cognitive endophenotype for the disorder. Additionally, these findings move us closer to developing effective cognitive interventions tailored to specific subtypes of pediatric BD patients.
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Affiliation(s)
| | - Amy E. West
- Pediatric Mood Disorders Program, University of Illinois at Chicago
| | - Rachel Jacobs
- Pediatric Mood Disorders Program, University of Illinois at Chicago
| | - John A. Sweeney
- Center for Cognitive Medicine, University of Illinois at Chicago
| | - Mani N. Pavuluri
- Pediatric Mood Disorders Program, University of Illinois at Chicago,Center for Cognitive Medicine, University of Illinois at Chicago
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Case LK, Ramachandran VS. Alternating gender incongruity: A new neuropsychiatric syndrome providing insight into the dynamic plasticity of brain-sex. Med Hypotheses 2012; 78:626-31. [DOI: 10.1016/j.mehy.2012.01.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 01/03/2012] [Accepted: 01/25/2012] [Indexed: 10/28/2022]
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Tenconi E, Santonastaso P, Degortes D, Bosello R, Titton F, Mapelli D, Favaro A. Set-shifting abilities, central coherence, and handedness in anorexia nervosa patients, their unaffected siblings and healthy controls: exploring putative endophenotypes. World J Biol Psychiatry 2010; 11:813-23. [PMID: 20486870 DOI: 10.3109/15622975.2010.483250] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE There is consistent evidence that anorexia nervosa (AN) is associated with an impairment of set-shifting abilities and central coherence. No study to date investigated handedness in AN. Our aim was to study set-shifting abilities, central coherence, and handedness in subjects with lifetime AN, in a sample of unaffected sisters and in healthy controls, in order to explore their suitability as endophenotypes of AN. METHODS The Edinburgh Handedness Inventory and several neuropsychological tasks (Wisconsin Card Sorting Test, Trail Making Test, Rey-Osterrieth Complex Figure Test, Overlapping Figures Test, Object Assembly and Block Design) were administered to 153 subjects with lifetime AN, 28 unaffected sisters and 120 healthy controls. RESULTS AN subjects and their healthy sisters showed poorer performances on most tasks investigating set-shifting and central coherence. In addition, we did not find any differences between long-term recovered subjects, weight-restored AN patients and those in an acute phase of their illness. AN subjects were significantly more likely to be left-handed than healthy controls (OR=2.8, 95% C.I. 1.1-7.2). CONCLUSIONS Set-shifting and central coherence seem to be promising cognitive endophenotypes that might help in the understanding of the pathogenetic processes involved in AN. Further studies on larger samples are needed to explore the generalizability and implications of our findings concerning handedness.
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Affiliation(s)
- Elena Tenconi
- Department of Neurosciences, University of Padova, Padova, Italy
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Deep-Soboslay A, Hyde TM, Callicott JP, Lener MS, Verchinski BA, Apud JA, Weinberger DR, Elvevåg B. Handedness, heritability, neurocognition and brain asymmetry in schizophrenia. ACTA ACUST UNITED AC 2010; 133:3113-22. [PMID: 20639549 DOI: 10.1093/brain/awq160] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Higher rates of non-right-handedness (i.e. left- and mixed-handedness) have been reported in schizophrenia and have been a centrepiece for theories of anomalous lateralization in this disorder. We investigated whether non-right-handedness is (i) more prevalent in patients as compared with unaffected siblings and healthy unrelated control participants; (ii) familial; (iii) associated with disproportionately poorer neurocognition; and (iv) associated with grey matter volume asymmetries. We examined 1445 participants (375 patients with schizophrenia, 502 unaffected siblings and 568 unrelated controls) using the Edinburgh Handedness Inventory, a battery of neuropsychological tasks and structural magnetic resonance imaging data. Patients displayed a leftward shift in Edinburgh Handedness Inventory laterality quotient scores as compared with both their unaffected siblings and unrelated controls, but this finding disappeared when sex was added to the model. Moreover, there was no evidence of increased familial risk for non-right-handedness. Non-right-handedness was not associated with disproportionate neurocognitive disadvantage or with grey matter volume asymmetries in the frontal pole, lateral occipital pole or temporal pole. Non-right-handedness was associated with a significant reduction in left asymmetry in the superior temporal gyrus in both patients and controls. Our data neither provide strong support for 'atypical' handedness as a schizophrenia risk-associated heritable phenotype nor that it is associated with poorer neurocognition or anomalous cerebral asymmetries.
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Affiliation(s)
- Amy Deep-Soboslay
- Clinical Brain Disorders Branch, National Institute of Mental Health, National Institutes of Health,10 Center Drive, Bethesda, MD 20892, USA
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Rao NP, Arasappa R, Reddy NN, Venkatasubramanian G, Gangadhar BN. Antithetical asymmetry in schizophrenia and bipolar affective disorder: a line bisection study. Bipolar Disord 2010; 12:221-9. [PMID: 20565429 DOI: 10.1111/j.1399-5618.2010.00811.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVE Evolutionary theories link the pathogenesis of psychosis with anomalous brain asymmetry. Research shows that aberrant lateralization is linked to schizophrenia with elevated rates of left-handedness and reversal of normal cerebral asymmetries. However, lateralization is underexamined in bipolar affective disorder (BPAD) and the available literature suggests the possibility of greater lateralization, which is diametrically opposite to what is observed in schizophrenia. For the first time, we report concurrent analyses of asymmetry in BPAD and schizophrenia using a line bisection task. METHODS We examined 164 subjects (31 patients with BPAD in remission, 30 patients with schizophrenia, and 103 healthy controls) using a two-hand line bisection task with established methodology. Raters with good inter-rater reliability (intraclass correlation coefficient > 0.8) measured deviation from the center. Task performance was compared using analysis of covariance with age, sex, and education as covariates. RESULTS Study groups did not differ significantly on age, sex, and handedness (p > 0.06). Patients (both schizophrenia and BPAD) had significantly more errors in identifying the center than controls (p < 0.001). Patients with schizophrenia bisected fewer lines at center than controls and BPAD subjects (p < 0.001). Using their right hand, schizophrenia patients had significant rightward deviation and BPAD patients had leftward deviation (p = 0.001). A significant interaction between diagnosis and direction of deviation (p = 0.01) was noted, with significant rightward deviation in schizophrenia and a trend toward leftward deviation in BPAD. CONCLUSIONS Study findings suggest attenuation of normal pseudoneglect in schizophrenia and accentuation of normal pseudoneglect in BPAD, indicating lesser lateralization in schizophrenia and possibly greater lateralization in BPAD. From an evolutionary perspective, schizophrenia and BPAD might have antithetical origins.
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Affiliation(s)
- Naren P Rao
- Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, India
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Dopamine type-1 receptor binding in major depressive disorder assessed using positron emission tomography and [11C]NNC-112. Neuropsychopharmacology 2009; 34:1277-87. [PMID: 18946469 PMCID: PMC2656589 DOI: 10.1038/npp.2008.194] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The dopamine type-1 receptor has been implicated in major depressive disorder (MDD) by clinical and preclinical evidence from neuroimaging, post mortem, and behavioral studies. To date, however, selective in vivo assessment of D(1) receptors has been limited to the striatum in MDD samples manifesting anger attacks. We employed the PET radioligand, [(11)C]NNC-112, to selectively assess D(1) receptor binding in extrastriatal and striatal regions in a more generalized sample of MDD subjects. The [(11)C]NNC-112 nondisplaceable binding potential (BP(ND)) was assessed using PET in 18 unmedicated, currently depressed subjects with MDD and 19 healthy controls, and compared between groups using MRI-based region-of-interest analysis. The mean D(1) receptor BP(ND) was reduced (14%) in the left middle caudate of the MDD group relative to control group (p<0.05). Among the MDD subjects D(1) receptor BP(ND) in this region correlated negatively with illness duration (r=-0.53; p=0.02), and the left-to-right BP(ND) ratio correlated inversely with anhedonia ratings (r=-0.65, p=0.0040). The D(1) receptor BP(ND) was strongly lateralized in striatal regions (p<0.002 for main effects of hemisphere in accumbens area, putamen, and caudate). In post hoc analyses, a group-by-hemisphere-by-gender interaction was detected in the dorsal putamen, which was accounted for by a loss of the normal asymmetry in depressed women (F=7.33, p=0.01). These data extended a previous finding of decreased striatal D(1) receptor binding in an MDD sample manifesting anger attacks to a sample selected more generally according to MDD criteria. Our data also more specifically localized this abnormality in MDD to the left middle caudate, which is the target of afferent neural projections from the orbitofrontal and anterior cingulate cortices where neuropathological changes have been reported in MDD. Finally, D(1) receptor binding was asymmetrical across hemispheres in healthy humans, compatible with evidence that dopaminergic function in the striatum is lateralized during reward processing, voluntary movement, and self-stimulation behavior.
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Ballanger B, Boulinguez P. EMG as a key tool to assess motor lateralization and hand reaction time asymmetries. J Neurosci Methods 2009; 179:85-9. [DOI: 10.1016/j.jneumeth.2009.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 01/08/2009] [Accepted: 01/10/2009] [Indexed: 10/21/2022]
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Bipolar and major depressive disorder: neuroimaging the developmental-degenerative divide. Neurosci Biobehav Rev 2009; 33:699-771. [PMID: 19428491 DOI: 10.1016/j.neubiorev.2009.01.004] [Citation(s) in RCA: 361] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Accepted: 01/14/2009] [Indexed: 01/30/2023]
Abstract
Both major depressive disorder and bipolar disorder are the subject of a voluminous imaging and genetics literature. Here, we attempt a comprehensive review of MRI and metabolic PET studies conducted to date on these two disorders, and interpret our findings from the perspective of developmental and degenerative models of illness. Elevated activity and volume loss of the hippocampus, orbital and ventral prefrontal cortex are recurrent themes in the literature. In contrast, dorsal aspects of the PFC tend to display hypometabolism. Ventriculomegaly and white matter hyperintensities are intimately associated with depression in elderly populations and likely have a vascular origin. Important confounding influences are medication, phenotypic and genetic heterogeneity, and technological limitations. We suggest that environmental stress and genetic risk variants interact with each other in a complex manner to alter neural circuitry and precipitate illness. Imaging genetic approaches hold out promise for advancing our understanding of affective illness.
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Abstract
Recent studies have suggested that some variants of bipolar disorder (BD) may be due to hyperconnectivity between orbitofrontal (OFC) and temporal pole (TP) structures in the dominant hemisphere. Some initial MRI studies noticed that there were corpus callosum abnormalities within specific regional areas and it was hypothesized that developmentally this could result in functional or effective connectivity changes within the orbitofrontal-basal ganglia-thalamocortical circuits. Recent diffusion tensor imaging (DTI) white matter fiber tractography studies may well be superior to region of interest (ROI) DTI in understanding BD. A "ventral semantic stream" has been discovered connecting the TP and OFC through the uncinate and inferior longitudinal fasciculi and the elusive TP is known to be involved in theory of mind and complex narrative understanding tasks. The OFC is involved in abstract valuation in goal and sub-goal structures and the TP may be critical in binding semantic memory with person-emotion linkages associated with narrative. BD patients have relative attenuation of performance on visuoconstructional praxis consistent with an atypical localization of cognitive functions. Multiple lines of evidence suggest that some BD alleles are being selected for which could explain the enhanced creativity in higher-ability probands. Associations between ROI's that are not normally connected could explain the higher incidence of artistic aptitude, writing ability, and scientific achievements among some mood disorder subjects.
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Affiliation(s)
- Simon M McCrea
- Departments of Neurology and Neuroophthalmology, University of British Columbia, 2550 Willow Street, Vancouver, British Columbia, Canada V5Z 3N9.
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