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Wang Y, Xu F, Zhou W, Hou L, Tang Y, Liu S. Morphological and hemispheric and sex differences of the anterior ascending ramus and the horizontal ascending ramus of the lateral sulcus. Brain Struct Funct 2022; 227:1949-1961. [PMID: 35441988 PMCID: PMC9232435 DOI: 10.1007/s00429-022-02482-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/13/2022] [Indexed: 11/30/2022]
Abstract
Broca’s area is composed of the pars opercularis (PO) and the pars triangularis (PTR) of the inferior frontal gyrus; the anterior ascending ramus of the lateral sulcus (aals) separates the PO from the PTR, and the horizontal ascending ramus of the lateral sulcus (hals) separates the PTR from the pars orbitalis. The morphometry of these two sulci maybe has potential effects on the various functions of Broca’s area. Exploring the morphological variations, hemispheric differences and sex differences of these two sulci contributed to a better localization of Broca's area. BrainVISA was used to reconstruct and parameterize these two sulci based on data from 3D MR images of 90 healthy right-handed subjects. The 3D anatomic morphologies of these two sulci were investigated using 4 sulcal parameters: average depth (AD), average width (AW), outer length (OL) and inner length (IL). The aals and hals could be identified in 98.89% and 98.33%, respectively, of the hemispheres evaluated. The morphological patterns of these two sulci were categorized into four typical types. There were no statistically significant interhemispheric or sex differences in the frequency of the morphological patterns. There was statistically significant interhemispheric difference in the IL of the aals. Significant sex differences were found in the AD and the IL of the aals and OL of the hals. Our results not only provide a structural basis for functional studies related to Broca’s area but also are helpful in determining the precise position of Broca’s area in neurosurgery.
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Affiliation(s)
- Yu Wang
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China
| | - Feifei Xu
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China
| | - Wenjuan Zhou
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China
| | - Lanwei Hou
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China
| | - Yuchun Tang
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China.,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China
| | - Shuwei Liu
- Department of Anatomy and Neurobiology, Research Center for Sectional and Imaging Anatomy, Shandong Provincial Key Laboratory of Mental Disorder, Shandong Key Laboratory of Digital Human and Clinical Anatomy, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China. .,Institute of Brain and Brain-Inspired Science, Shandong University, Jinan, 250012, Shandong, China.
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Shaw DM, Polikowsky HP, Pruett DG, Chen HH, Petty LE, Viljoen KZ, Beilby JM, Jones RM, Kraft SJ, Below JE. Phenome risk classification enables phenotypic imputation and gene discovery in developmental stuttering. Am J Hum Genet 2021; 108:2271-2283. [PMID: 34861174 PMCID: PMC8715184 DOI: 10.1016/j.ajhg.2021.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/27/2021] [Indexed: 11/30/2022] Open
Abstract
Developmental stuttering is a speech disorder characterized by disruption in the forward movement of speech. This disruption includes part-word and single-syllable repetitions, prolongations, and involuntary tension that blocks syllables and words, and the disorder has a life-time prevalence of 6-12%. Within Vanderbilt's electronic health record (EHR)-linked biorepository (BioVU), only 142 individuals out of 92,762 participants (0.15%) are identified with diagnostic ICD9/10 codes, suggesting a large portion of people who stutter do not have a record of diagnosis within the EHR. To identify individuals affected by stuttering within our EHR, we built a PheCode-driven Gini impurity-based classification and regression tree model, PheML, by using comorbidities enriched in individuals affected by stuttering as predicting features and imputing stuttering status as the outcome variable. Applying PheML in BioVU identified 9,239 genotyped affected individuals (a clinical prevalence of ∼10%) for downstream genetic analysis. Ancestry-stratified GWAS of PheML-imputed affected individuals and matched control individuals identified rs12613255, a variant near CYRIA on chromosome 2 (B = 0.323; p value = 1.31 × 10-8) in European-ancestry analysis and rs7837758 (B = 0.518; p value = 5.07 × 10-8), an intronic variant found within the ZMAT4 gene on chromosome 8, in African-ancestry analysis. Polygenic-risk prediction and concordance analysis in an independent clinically ascertained sample of developmental stuttering cases validate our GWAS findings in PheML-imputed affected and control individuals and demonstrate the clinical relevance of our population-based analysis for stuttering risk.
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Affiliation(s)
- Douglas M Shaw
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37203, USA
| | - Hannah P Polikowsky
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37203, USA
| | - Dillon G Pruett
- Hearing and Speech Sciences, Vanderbilt University, Nashville, TN 37203, USA
| | - Hung-Hsin Chen
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37203, USA
| | - Lauren E Petty
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37203, USA
| | - Kathryn Z Viljoen
- Curtin School of Allied Health, Curtin University, Perth 6845, Australia
| | - Janet M Beilby
- Curtin School of Allied Health, Curtin University, Perth 6845, Australia
| | - Robin M Jones
- Hearing and Speech Sciences, Vanderbilt University, Nashville, TN 37203, USA
| | - Shelly Jo Kraft
- Communication Sciences and Disorders, Wayne State University, Detroit, MI 48202, USA
| | - Jennifer E Below
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN 37203, USA.
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Polikowsky HG, Shaw DM, Petty LE, Chen HH, Pruett DG, Linklater JP, Viljoen KZ, Beilby JM, Highland HM, Levitt B, Avery CL, Mullan Harris K, Jones RM, Below JE, Kraft SJ. Population-based genetic effects for developmental stuttering. HGG ADVANCES 2021; 3:100073. [PMID: 35047858 PMCID: PMC8756529 DOI: 10.1016/j.xhgg.2021.100073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 11/10/2021] [Indexed: 11/16/2022] Open
Abstract
Despite a lifetime prevalence of at least 5%, developmental stuttering, characterized by prolongations, blocks, and repetitions of speech sounds, remains a largely idiopathic speech disorder. Family, twin, and segregation studies overwhelmingly support a strong genetic influence on stuttering risk; however, its complex mode of inheritance combined with thus-far underpowered genetic studies contribute to the challenge of identifying and reproducing genes implicated in developmental stuttering susceptibility. We conducted a trans-ancestry genome-wide association study (GWAS) and meta-analysis of developmental stuttering in two primary datasets: The International Stuttering Project comprising 1,345 clinically ascertained cases from multiple global sites and 6,759 matched population controls from the biobank at Vanderbilt University Medical Center (VUMC), and 785 self-reported stuttering cases and 7,572 controls ascertained from The National Longitudinal Study of Adolescent to Adult Health (Add Health). Meta-analysis of these genome-wide association studies identified a genome-wide significant (GWS) signal for clinically reported developmental stuttering in the general population: a protective variant in the intronic or genic upstream region of SSUH2 (rs113284510, protective allele frequency = 7.49%, Z = -5.576, p = 2.46 × 10-8) that acts as an expression quantitative trait locus (eQTL) in esophagus-muscularis tissue by reducing its gene expression. In addition, we identified 15 loci reaching suggestive significance (p < 5 × 10-6). This foundational population-based genetic study of a common speech disorder reports the findings of a clinically ascertained study of developmental stuttering and highlights the need for further research.
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Affiliation(s)
- Hannah G. Polikowsky
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Douglas M. Shaw
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Lauren E. Petty
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Hung-Hsin Chen
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dillon G. Pruett
- Hearing and Speech Sciences, Vanderbilt University, Nashville, TN, USA
| | | | | | - Janet M. Beilby
- Curtin School of Allied Health, Curtin University, Perth, WA, Australia
| | - Heather M. Highland
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Brandt Levitt
- Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Christy L. Avery
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Kathleen Mullan Harris
- Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA,Department of Sociology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Robin M. Jones
- Hearing and Speech Sciences, Vanderbilt University, Nashville, TN, USA
| | - Jennifer E. Below
- Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA,Corresponding author
| | - Shelly Jo Kraft
- Communication Sciences and Disorders, Wayne State University, Detroit, MI, USA,Corresponding author
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Xu M, Liang X, Ou J, Li H, Luo YJ, Tan LH. Sex Differences in Functional Brain Networks for Language. Cereb Cortex 2019; 30:1528-1537. [DOI: 10.1093/cercor/bhz184] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Revised: 06/20/2019] [Accepted: 07/17/2019] [Indexed: 12/18/2022] Open
Abstract
Abstract
Men and women process language differently, but how the brain functions to support this difference is poorly understood. A few studies reported sex influences on brain activation for language, whereas others failed to detect the difference at the functional level. Recent advances of brain network analysis have shown great promise in picking up brain connectivity differences between sexes, leading us to hypothesize that the functional connections among distinct brain regions for language may differ in males and females. To test this hypothesis, we scanned 58 participants’ brain activities (28 males and 30 females) in a semantic decision task using functional magnetic resonance imaging. We found marked sex differences in dynamic interactions among language regions, as well as in functional segregation and integration of brain networks during language processing. The brain network differences were further supported by a machine learning analysis that accurately discriminated males from females using the multivariate patterns of functional connectivity. The sex-specific functional brain connectivity may constitute an essential neural basis for the long-held notion that men and women process language in different ways. Our finding also provides important implications for sex differences in the prevalence of language disorders, such as dyslexia and stuttering.
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Affiliation(s)
- Min Xu
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
| | - Xiuling Liang
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Jian Ou
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
- School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Hong Li
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
- School of Psychology, Shenzhen University, Shenzhen 518060, China
| | - Yue-jia Luo
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
| | - Li Hai Tan
- Center for Brain Disorders and Cognitive Science, Shenzhen University, Shenzhen 518060, China
- Center for Language and Brain, Shenzhen Institute of Neuroscience, Shenzhen 518060, China
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Yuksel T, Sizer E, Durak H. 2D:4D ratios as an indicator of intrauterine androgen exposure in children who stutter. Early Hum Dev 2019; 135:27-31. [PMID: 31228858 DOI: 10.1016/j.earlhumdev.2019.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 06/01/2019] [Accepted: 06/04/2019] [Indexed: 11/15/2022]
Abstract
AIM We aimed to explore whether there is a relationship between stuttering and digit ratio (2D:4D), which is thought to be a marker of prenatal testosterone exposure. METHODS We evaluated a total of 90 children who stutter (CWS; n = 40 mild-to-moderate and n = 50 severe stutters) and 40 healthy peers (CWNS) as controls. We used the Clinical Global Impression-Severity (CGIS) scale to measure the severity of stuttering. We measured the lengths of index finger (2D) and ring finger (4D) of both hands directly and divided to calculate 2D:4D ratio. The difference between the right and the left hand 2D:4D ratio (DR-L) was also calculated. RESULT Significant difference was found in right 2D:4D and the mean DR-L between the CWS and CWNS groups. Right 2D:4D was significantly lower in stuttering boys than in control boys, and in stuttering girls than control girls. Also, DR-L was significantly lower in stuttering boys than control boys. In ANOVA, there were significant differences between the mild-to-moderate, severe stuttering and control groups in terms of right 2D:4D and DR-L. Right hand 2D:4D and DR-L decreased from controls to severe stutterers. CONCLUSION Our results suggest that lower right 2D:4D and DR-L were related to the presence and severity of stuttering in children, i.e. CWS had lower 2D:4D and DR-L than CWNS. Further large-scale prospective studies are needed to clarify the reliability of 2D:4D ratio as an indicator of fetal sex hormone exposure level and its relation with the presence and severity of stuttering in children.
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Affiliation(s)
- Tugba Yuksel
- Dicle University School of Medicine, Department of Child and Adolescent Psychiatry, Diyarbakir, Turkey.
| | - Esra Sizer
- Dicle University School of Medicine, Department of Child and Adolescent Psychiatry, Diyarbakir, Turkey
| | - Hasan Durak
- Dicle University School of Medicine, Department of Child and Adolescent Psychiatry, Diyarbakir, Turkey
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Mohammadi H, Papadatou-Pastou M. Cerebral laterality as assessed by hand preference measures and developmental stuttering. Laterality 2019; 25:127-149. [PMID: 31144576 DOI: 10.1080/1357650x.2019.1621329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The causes of developmental stuttering, a neurodevelopmental communicative disorder, have not been elucidated to date. Neuroimaging studies suggest that atypical cerebral laterality could be one of such causal factors. Moreover, handedness, a behavioural index for cerebral laterality, has been linked to stuttering and recovery from it. However, findings are conflicting, possibly due to sample selection procedures, which typically rely on self-reported stuttering, and to the fact that handedness is typically assessed with regards to its direction rather than degree. We investigated the possible relationship between handedness and stuttering. This is the first study where children who stutter (CWS) were selected using clinical criteria as well as speech samples and where a non-Western population was studied. Findings from 83 CWS aged 3-9 years (mean = 6.43, SD = 1.84) and 90 age- and sex-matched children who do not stutter (mean = 6.45, SD = 1.71) revealed no differences in their hand preference scores as evaluated by parent-completed Edinburgh Handedness Inventory, for both direction and degree. The severity of stuttering was not found to correlate with the degree of handedness. We suggest that parents and professionals not treat left- or mixed-hand preference as a reason for concern with regards to stuttering.
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Affiliation(s)
- Hiwa Mohammadi
- Department of Neurology & Sleep Disorders Research Center, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Marietta Papadatou-Pastou
- School of Education, Faculty of Primary Education, National and Kapodistrian University of Athens, Athens, Greece
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Frigerio Domingues CE, Grainger K, Cheng H, Moretti-Ferreira D, Riazuddin S, Drayna D. Are variants in sex hormone metabolizing genes associated with stuttering? BRAIN AND LANGUAGE 2019; 191:28-30. [PMID: 30798091 PMCID: PMC6404540 DOI: 10.1016/j.bandl.2019.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 06/09/2023]
Affiliation(s)
| | | | - Hui Cheng
- NIDCD/National Institutes of Health, Bethesda, MD 20892, USA
| | | | | | - Dennis Drayna
- NIDCD/National Institutes of Health, Bethesda, MD 20892, USA.
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Mohammadi H, Joghataei MT, Rahimi Z, Faghihi F, Farhangdoost H. Relationship between serum homovanillic acid, DRD2 C957T (rs6277), and hDAT A559V (rs28364997) polymorphisms and developmental stuttering. JOURNAL OF COMMUNICATION DISORDERS 2018; 76:37-46. [PMID: 30199750 DOI: 10.1016/j.jcomdis.2018.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 08/12/2018] [Accepted: 08/25/2018] [Indexed: 06/08/2023]
Abstract
The involvement of the brain dopamine system in the pathophysiology of developmental stuttering has been previously suggested. In the present study, we aimed to investigate the relationship between developmental stuttering in children and the levels of serum homovanillic acid (HVA), dopamine D2 receptor (DRD2) C957T (rs6277), and solute carrier family 6 member 3 (SLC6A3) human dopamine transporter (hDAT) A559V (rs28364997) single-nucleotide polymorphisms. In a case-control study, serum level of HVA, DRD2 C957T, and DAT A559V were compared between 85 children who stuttered (CWS) and 85 age- and sex-matched children who did not stutter (CWNS). Although serum level of HVA was higher among the CWS (median = 25.50 ng/mL) than that in the CWNS (median = 17.40 ng/mL), the difference between the two groups was not significant (p = 0.43). No significant correlation was observed between age and the level of HVA among all the participants (r = -0.15, p = 0.06), nor was there any correlation among the CWS (r = -0.19, p = 0.14) or among the CWNS (r = -0.13, p = 0.27) according to the Spearman correlation coefficient. On the other hand, there was a significant negative correlation between age from stuttering onset and the serum level of HVA among the CWS group (r = -0.32, p = 0.01). The Spearman correlation coefficient did not indicate any significant correlation between stuttering severity and HVA in CWS (r = -0.06, p = 0.59). The mutant allele of hDAT A559V was observed neither in the CWS nor in the controls. The allele frequencies of DRD2 C957T were not significantly different between the CWS and the CWNS; however, the frequency of the TT genotype was significantly higher among the CWS (p = 0.02), which was associated with 2.25-fold susceptibility to stuttering (OR = 2.25, 95% CI = 1.03 to 4.90, p = 0.04). Our findings suggest that the serum level of HVA might be a biomarker for dopaminergic involvement in the pathogenesis of stuttering. Moreover, the present study indicates that the DRD2 C957T polymorphism might be a risk factor for the development of stuttering among Iranian Kurdish population.
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Affiliation(s)
- Hiwa Mohammadi
- Department of Neurology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran; Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohammad Taghi Joghataei
- Department of Neuroscience, Iran University of Medical Sciences, Tehran, Iran; Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
| | - Zohreh Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Faezeh Faghihi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Hashem Farhangdoost
- Department of Speech Therapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
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