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Yasoda-Mohan A, Vanneste S. Development, Insults and Predisposing Factors of the Brain's Predictive Coding System to Chronic Perceptual Disorders-A Life-Course Examination. Brain Sci 2024; 14:86. [PMID: 38248301 PMCID: PMC10813926 DOI: 10.3390/brainsci14010086] [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: 12/12/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
The predictive coding theory is currently widely accepted as the theoretical basis of perception and chronic perceptual disorders are explained as the maladaptive compensation of the brain to a prediction error. Although this gives us a general framework to work with, it is still not clear who may be more susceptible and/or vulnerable to aberrations in this system. In this paper, we study changes in predictive coding through the lens of tinnitus and pain. We take a step back to understand how the predictive coding system develops from infancy, what are the different neural and bio markers that characterise this system in the acute, transition and chronic phases and what may be the factors that pose a risk to the aberration of this system. Through this paper, we aim to identify people who may be at a higher risk of developing chronic perceptual disorders as a reflection of aberrant predictive coding, thereby giving future studies more facets to incorporate in their investigation of early markers of tinnitus, pain and other disorders of predictive coding. We therefore view this paper to encourage the thinking behind the development of preclinical biomarkers to maladaptive predictive coding.
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Affiliation(s)
- Anusha Yasoda-Mohan
- Global Brain Health Institute, Trinity College Dublin, D02 R123 Dublin, Ireland;
- Trinity College Institute for Neuroscience, Trinity College Dublin, D02 R123 Dublin, Ireland
- Lab for Clinical & Integrative Neuroscience, School of Psychology, Trinity College Dublin, D02 R123 Dublin, Ireland
| | - Sven Vanneste
- Global Brain Health Institute, Trinity College Dublin, D02 R123 Dublin, Ireland;
- Trinity College Institute for Neuroscience, Trinity College Dublin, D02 R123 Dublin, Ireland
- Lab for Clinical & Integrative Neuroscience, School of Psychology, Trinity College Dublin, D02 R123 Dublin, Ireland
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2
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Leal ASM, Alba LA, Cummings KK, Jung J, Waizman YH, Moreira JFG, Saragosa-Harris NM, Ninova E, Waterman JM, Langley AK, Tottenham N, Silvers JA, Green SA. Sensory processing challenges as a novel link between early caregiving experiences and mental health. Dev Psychopathol 2023; 35:1968-1981. [PMID: 36523255 PMCID: PMC10734795 DOI: 10.1017/s0954579422000633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Early caregiving adversity (ECA) is associated with elevated psychological symptomatology. While neurobehavioral ECA research has focused on socioemotional and cognitive development, ECA may also increase risk for "low-level" sensory processing challenges. However, no prior work has compared how diverse ECA exposures differentially relate to sensory processing, or, critically, how this might influence psychological outcomes. We examined sensory processing challenges in 183 8-17-year-old youth with and without histories of institutional (orphanage) or foster caregiving, with a particular focus on sensory over-responsivity (SOR), a pattern of intensified responses to sensory stimuli that may negatively impact mental health. We further tested whether sensory processing challenges are linked to elevated internalizing and externalizing symptoms common in ECA-exposed youth. Relative to nonadopted comparison youth, both groups of ECA-exposed youth had elevated sensory processing challenges, including SOR, and also had heightened internalizing and externalizing symptoms. Additionally, we found significant indirect effects of ECA on internalizing and externalizing symptoms through both general sensory processing challenges and SOR, covarying for age and sex assigned at birth. These findings suggest multiple forms of ECA confer risk for sensory processing challenges that may contribute to mental health outcomes, and motivate continuing examination of these symptoms, with possible long-term implications for screening and treatment following ECA.
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Affiliation(s)
| | - Laura A. Alba
- Graduate School of Education, University of California, Riverside, Riverside, CA, USA
| | - Kaitlin K. Cummings
- Department of Psychiatry and Biobehavioral Sciences, Jane & Terry Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jiwon Jung
- Department of Psychiatry and Biobehavioral Sciences, Jane & Terry Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, USA
| | - Yael H. Waizman
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA
| | | | | | - Emilia Ninova
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Jill M. Waterman
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Audra K. Langley
- Department of Psychiatry and Biobehavioral Sciences, Jane & Terry Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, USA
- UCLA Pritzker Center for Strengthening Children and Families, Los Angeles, CA, USA
| | - Nim Tottenham
- Department of Psychology, Columbia University, New York, NY, USA
| | - Jennifer A. Silvers
- Department of Psychology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Shulamite A. Green
- Department of Psychiatry and Biobehavioral Sciences, Jane & Terry Semel Institute of Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, USA
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3
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Possible Neural Mechanisms Underlying Sensory Over-Responsivity in Individuals with ASD. CURRENT DEVELOPMENTAL DISORDERS REPORTS 2022. [DOI: 10.1007/s40474-022-00257-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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4
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Interventions for Sensory Over-Responsivity in Individuals with Autism Spectrum Disorder: A Narrative Review. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9101584. [PMID: 36291519 PMCID: PMC9601143 DOI: 10.3390/children9101584] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 11/05/2022]
Abstract
Individuals with autism spectrum disorder (ASD) often exhibit sensory over-responsivity (SOR), which is characterized by an overwhelmingly negative reaction to or avoidance of sensory stimulation. Despite the detrimental effects of SOR on people’s personal and social lives, the knowledge of and interventions for the issue remain limited. This paper collates and reviews studies on SOR and information on the potential for effective interventions for people with ASD. This review reveals evidence that SOR has a close relationship with anxiety, depression, insomnia, and family life impairment and an underlying mechanism related to SOR. Four interventions and their theoretical bases in sensory-motor processing are discussed in this paper, namely, physical activity (PA), sensory integration therapy (SIT), mindfulness-based cognitive therapy (MBCT), and cognitive behavioral therapy (CBT). These interventions focus on establishing coping strategies for regulating the emotional response to sensory information, and they have been found to be effective and to have the potential to help children with ASD reduce their SOR behaviors. This paper provides guidance for selecting appropriate interventions and for further investigation of more effective interventions in the future.
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5
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Wang R, Martin CD, Lei AL, Hausknecht KA, Turk M, Micov V, Kwarteng F, Ishiwari K, Oubraim S, Wang AL, Richards JB, Haj-Dahmane S, Shen RY. Prenatal ethanol exposure impairs sensory processing and habituation to visual stimuli, effects normalized by enrichment of postnatal environmental. Alcohol Clin Exp Res 2022; 46:891-906. [PMID: 35347730 PMCID: PMC9122102 DOI: 10.1111/acer.14818] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Individuals with fetal alcohol spectrum disorders (FASD) often show processing deficits in all sensory modalities. Using an operant light reinforcement model, we tested whether prenatal ethanol exposure (PE) alters operant responding to elicit a contingent sensory stimulus-light onset (turning on the light) and habituation to this behavior in rats. We also explored whether postnatal environmental enrichment could ameliorate PE-induced deficits. METHODS Pregnant Sprague Dawley rats were gavaged twice/day with 0 or 3 g/kg/treatment ethanol (15% w/v) during gestational days 8-20, mimicking second-trimester heavy PE in humans. The offspring were reared in a standard housing condition or an enriched condition. Adult male and female offspring underwent an operant light reinforcement experiment with either a short-access or a long-access procedure. A dishabituation test was also conducted to characterize the habituation process. RESULTS In the short-access procedure, PE led to increased operant responding to the contingent light onset in both sexes reared in the standard housing condition. Such an effect was not observed in rats reared in enriched conditions due to an overall decrease in responding. Moreover, rats reared in enriched conditions showed greater short-term habituation. In the long access procedure, PE rats showed increased responding and impaired long-term habituation. The long-access procedure facilitated both short-term and long-term habituation in control and PE rats. CONCLUSION Prenatal ethanol exposure increases responding to contingent light onset and impairs the long-term habituation process. The PE-induced deficits were ameliorated by rearing in the enriched environment and increasing the duration and frequency of exposure to light onset. The PE-induced effects are like increased sensation-seeking, a subtype of sensory-processing deficit that is often observed in individuals with FASD. Our findings could inform a suitable animal model for investigating the underlying mechanisms and possible intervention strategies for sensory deficits in FASD.
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Affiliation(s)
- Ruixiang Wang
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Connor D. Martin
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Anna L. Lei
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Kathryn A. Hausknecht
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Marisa Turk
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Veronika Micov
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Francis Kwarteng
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Keita Ishiwari
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Saida Oubraim
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - An-Li Wang
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Jerry B. Richards
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Samir Haj-Dahmane
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Roh-Yu Shen
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York, USA
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6
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Wiggins LD, Tian LH, Rubenstein E, Schieve L, Daniels J, Pazol K, DiGuiseppi C, Barger B, Moody E, Rosenberg S, Bradley C, Hsu M, Rosenberg CR, Christensen D, Crume T, Pandey J, Levy SE. Features that best define the heterogeneity and homogeneity of autism in preschool-age children: A multisite case-control analysis replicated across two independent samples. Autism Res 2022; 15:539-550. [PMID: 34967132 PMCID: PMC9048225 DOI: 10.1002/aur.2663] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 11/15/2021] [Accepted: 12/09/2021] [Indexed: 11/12/2022]
Abstract
The heterogeneous nature of children with symptoms of autism spectrum disorder (ASD) makes it difficult to identify risk factors and effective treatment options. We sought to identify behavioral and developmental features that best define the heterogeneity and homogeneity in 2-5-year-old children classified with ASD and subthreshold ASD characteristics. Children were enrolled in a multisite case-control study of ASD. Detailed behavioral and developmental data were gathered by maternal telephone interview, parent-administered questionnaires, child cognitive evaluation, and ASD diagnostic measures. Participants with a positive ASD screen score or prior ASD diagnosis were referred for comprehensive evaluation. Children in the ASD group met study criteria based on this evaluation; children who did not meet study criteria were categorized as having subthreshold ASD characteristics. There were 1480 children classified as ASD (81.6% boys) and 594 children classified as having subthreshold ASD characteristics (70.2% boys) in the sample. Factors associated with dysregulation (e.g., aggression, anxiety/depression, sleep problems) followed by developmental abilities (e.g., expressive and receptive language skills) most contributed to heterogeneity in both groups of children. Atypical sensory response contributed to homogeneity in children classified as ASD but not those with subthreshold characteristics. These findings suggest that dysregulation and developmental abilities are clinical features that can impact functioning in children with ASD and other DD, and that documenting these features in pediatric records may help meet the needs of the individual child. Sensory dysfunction could be considered a core feature of ASD and thus used to inform more targeted screening, evaluation, treatment, and research efforts. LAY SUMMARY: The diverse nature of autism spectrum disorder (ASD) makes it difficult to find risk factors and treatment options. We identified the most dissimilar and most similar symptom(s) in children classified as ASD and as having subthreshold ASD characteristics. Factors associated with dysregulation and developmental abilities contributed to diversity in both groups of children. Sensory dysfunction was the most common symptom in children with ASD but not those with subthreshold characteristics. Findings can inform clinical practice and research.
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Affiliation(s)
- Lisa D. Wiggins
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Lin H. Tian
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Eric Rubenstein
- Department of Epidemiology, Boston University, Boston, Massachusetts, USA
| | - Laura Schieve
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Julie Daniels
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Karen Pazol
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | | | - Brian Barger
- School of Public Health, Georgia State University, Atlanta, Georgia, USA
| | - Eric Moody
- Institute for Disabilities, University of Wyoming, Laramie, Wyoming, USA
| | - Steven Rosenberg
- Anschutz Medical Campus, University of Colorado, Boulder, Colorado, USA
| | - Chyrise Bradley
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Melanie Hsu
- The Autism Research Program, Kaiser Permanente Northern California, Oakland, California, USA
| | | | - Deborah Christensen
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Tessa Crume
- Anschutz Medical Campus, University of Colorado, Boulder, Colorado, USA
| | - Juhi Pandey
- Center for Autism Research, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Susan E. Levy
- Center for Autism Research, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
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7
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Liu Y, Wang W, Xu W, Cheng Q, Ming D. Quantifying the Generation Process of Multi-Level Tactile Sensations via ERP Component Investigation. Int J Neural Syst 2021; 31:2150049. [PMID: 34635035 DOI: 10.1142/s0129065721500490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Humans obtain characteristic information such as texture and weight of external objects, relying on the brain's integration and classification of tactile information; however, the decoding mechanism of multi-level tactile information is relatively elusive from the temporal sequence. In this paper, nonvariant frequency, along with the variant pulse width of electrotactile stimulus, was performed to generate multi-level pressure sensation. Event-related potentials (ERPs) were measured to investigate the mechanism of whole temporal tactile processing. Five ERP components, containing P100-N140-P200-N200-P300, were observed. By establishing the relationship between stimulation parameters and ERP component amplitudes, we found the following: (1) P200 is the most significant component for distinguishing multi-level tactile sensations; (2) P300 is correlated well with the subjective judgment of tactile sensation. The temporal sequence of brain topographies was implemented to clarify the spatiotemporal characteristics of the tactile process, which conformed to the serial processing model in neurophysiology and cortical network response area described by fMRI. Our results can help further clarify the mechanism of tactile sequential processing, which can be applied to improve the tactile BCI performance, sensory enhancement, and clinical diagnosis for doctors to evaluate the tactile process disorders by examining the temporal ERP components.
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Affiliation(s)
- Yuan Liu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China, 92 Weijin Road, Nankai District, Tianjin, P. R. China
| | - Wenjie Wang
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China, 92 Weijin Road, Nankai District, Tianjin, P. R. China
| | - Weiguo Xu
- Tianjin Hospital, Tianjin University, Tianjin, China, 406 South Jiefang Road, Hexi District, Tianjin, P. R. China
| | - Qian Cheng
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China, 92 Weijin Road, Nankai District, Tianjin, P. R. China
| | - Dong Ming
- College of Precision Instruments and Optoelectronics Engineering, Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China, 92 Weijin Road, Nankai District, Tianjin, P. R. China
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8
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Miller LJ, Marco EJ, Chu RC, Camarata S. Editorial: Sensory Processing Across the Lifespan: A 25-Year Initiative to Understand Neurophysiology, Behaviors, and Treatment Effectiveness for Sensory Processing. Front Integr Neurosci 2021; 15:652218. [PMID: 33897385 PMCID: PMC8063042 DOI: 10.3389/fnint.2021.652218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/24/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Lucy Jane Miller
- Department of Pediatrics (Emeritus), University of Colorado, Denver, CO, United States.,Sensory Therapies and Research Institute for Sensory Processing Disorder, Centennial, CO, United States
| | - Elysa J Marco
- Cortica (United States), San Diego, CA, United States
| | - Robyn C Chu
- Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, United States.,Growing Healthy Children Therapy Services, Rescue, CA, United States
| | - Stephen Camarata
- School of Medicine, Vanderbilt University, Nashville, TN, United States
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9
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Adra N, Cao A, Makris N, Valera EM. Sensory Modulation Disorder and its Neural Circuitry in Adults with ADHD: A Pilot Study. Brain Imaging Behav 2021; 15:930-940. [PMID: 32770315 PMCID: PMC10655817 DOI: 10.1007/s11682-020-00302-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Compared to healthy controls (HCs), individuals with attention-deficit/hyperactivity disorder (ADHD) exhibit more symptoms of sensory processing disorder (SPD), which is associated with difficulties in educational and social activities. Most studies examining comorbid SPD-ADHD have been conducted with children and have not explored relations to brain volumes. In this pilot study, we assessed a subtype of SPD, sensory modulation disorder (SMD), and its relation to select brain volumes in adults with ADHD. We administered part of the Sensory Processing 3-Dimensions Scale (SP3D) to assess subtypes of SMD and collected structural imaging scans from 25 adults with ADHD and 29 healthy controls (HCs). Relative to HCs, subjects with ADHD scored higher on sensory craving (SC) and sensory under-responsivity (SUR) subscales. Although sensory over-responsivity (SOR) was marginally higher, this was no longer true when accounting for co-occurring anxiety. In individuals with ADHD, both SC and SUR were positively associated with amygdalar volume, SUR was also positively associated with striatal volume, whereas SOR was negatively associated with posterior ventral diencephalon volume. These preliminary findings suggest that SC and SUR may be characteristic of ADHD while SOR may be driven by co-occurring anxiety. Because different modalities were associated with different brain volumes, our findings also suggest that the modalities may involve unique neural circuits, but with a partial overlap between SC and SUR. These pilot data provide support for conducting studies examining SMD in larger samples of adults with ADHD to determine reproducibility, applicability and implications of these findings.
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Affiliation(s)
- Noor Adra
- Wellesley College, Wellesley, MA, USA
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
| | - Aihua Cao
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA
- Department of Pediatrics, Qilu hospital of Shandong University, Jinan, 250012, Shandong, China
- Brain Science Research Institute, Shandong University, Jinan, China
| | - Nikos Makris
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA
| | - Eve M Valera
- Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA, USA.
- Department of Psychiatry, Harvard Medical School, Boston, MA, USA.
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10
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Grzadzinski R, Donovan K, Truong K, Nowell S, Lee H, Sideris J, Turner-Brown L, Baranek GT, Watson LR. Sensory Reactivity at 1 and 2 Years Old is Associated with ASD Severity During the Preschool Years. J Autism Dev Disord 2021; 50:3895-3904. [PMID: 32157566 DOI: 10.1007/s10803-020-04432-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Children with Autism Spectrum Disorder (ASD) often display atypical sensory reactivity within the first years of life, prior to a diagnosis. This study examined sensory reactivity patterns at 14 months, changes from 14 to 23 months, and later ASD severity at 3 to 5 years of age in children (n = 87) at elevated likelihood of ASD. Results indicated that observed hyporeactivity at 14 months and increases from 14 to 23 months were related to higher ASD severity during the preschool years. Parent report of hyperreactivity at 14 months was associated with higher ASD severity in the RRB domain during the preschool years. Early hypo and hyperreactivity may predict later severity of ASD and aid in subtyping and developing individualized treatments.
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Affiliation(s)
- Rebecca Grzadzinski
- University of North Carolina, Carolina Institute for Developmental Disabilities, Chapel Hill, NC, USA.
| | - Kevin Donovan
- University of North Carolina, Department of Biostatistics, Chapel Hill, NC, USA
| | - Kinh Truong
- University of North Carolina, Department of Biostatistics, Chapel Hill, NC, USA
| | - Sallie Nowell
- University of North Carolina, Frank Porter Graham Child Development Institute, Chapel Hill, NC, USA
| | - Helen Lee
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - John Sideris
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | | | - Grace T Baranek
- Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Linda R Watson
- University of North Carolina, Division of Speech and Hearing Sciences, Chapel Hill, NC, USA
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11
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Jirikowic TL, Thorne JC, McLaughlin SA, Waddington T, Lee AKC, Astley Hemingway SJ. Prevalence and patterns of sensory processing behaviors in a large clinical sample of children with prenatal alcohol exposure. RESEARCH IN DEVELOPMENTAL DISABILITIES 2020; 100:103617. [PMID: 32203885 DOI: 10.1016/j.ridd.2020.103617] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 11/07/2019] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Atypical behavioral responses to sensation are reported in a large proportion of children affected by prenatal alcohol exposure (PAE). Systematic examination of symptoms across the fetal alcohol spectrum in a large clinical sample is needed to inform diagnosis and intervention. AIMS To describe the prevalence and patterns of atypical sensory processing symptoms in a clinical sample of children with PAE. METHODS Retrospective analysis of diagnostic clinical data from the University of Washington Fetal Alcohol Syndrome Diagnostic and Prevention Network (FASDPN). Participants were ages 3 through 11 years, had a diagnosis on the fetal alcohol spectrum, and Short Sensory Profile (SSP) assessment. The proportions of children categorized with definite differences on the SSP across selected clinical and demographic features were examined with chi-square analyses. OUTCOMES The sample consisted of 325 children; 73.2 % had SSP total scores in the definite difference range. Atypical sensory processing symptoms were significantly more prevalent among children with higher reported levels of PAE. The prevalence of atypical symptoms was comparably high across age, levels of diagnostic severity, and other prenatal/postnatal risks. CONCLUSIONS Results lend support for altered sensory processing as another domain of brain function affected by the teratogenic impact of PAE, guiding clinical work and research.
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Affiliation(s)
- Tracy L Jirikowic
- University of Washington School of Medicine, Department of Rehabilitation Medicine, Division of Occupational Therapy, United States.
| | - John C Thorne
- Department of Speech & Hearing Sciences, University of Washington, United States
| | - Susan A McLaughlin
- Institute for Learning & Brain Sciences, University of Washington, United States
| | - Tiffany Waddington
- Institute for Learning & Brain Sciences, University of Washington, United States
| | - Adrian K C Lee
- Department of Speech & Hearing Sciences and Institute for Learning & Brain Sciences, University of Washington, United States
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12
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Galiana-Simal A, Vela-Romero M, Romero-Vela VM, Oliver-Tercero N, García-Olmo V, Benito-Castellanos PJ, Muñoz-Martinez V, Beato-Fernandez L. Sensory processing disorder: Key points of a frequent alteration in neurodevelopmental disorders. COGENT MEDICINE 2020. [DOI: 10.1080/2331205x.2020.1736829] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Adrian Galiana-Simal
- Clínica Centro de Desarrollo Infantil de Ciudad Real (CDICR) C/Eras del cerrillo nº8 Ciudad Real 13004 Spain
| | - Maria Vela-Romero
- Clínica Centro de Desarrollo Infantil de Ciudad Real (CDICR) C/Eras del cerrillo nº8 Ciudad Real 13004 Spain
| | - Victor Manuel Romero-Vela
- Clínica Centro de Desarrollo Infantil de Ciudad Real (CDICR) C/Eras del cerrillo nº8 Ciudad Real 13004 Spain
| | - Nuria Oliver-Tercero
- Clínica Centro de Desarrollo Infantil de Ciudad Real (CDICR) C/Eras del cerrillo nº8 Ciudad Real 13004 Spain
| | - Virginia García-Olmo
- Clínica Centro de Desarrollo Infantil de Ciudad Real (CDICR) C/Eras del cerrillo nº8 Ciudad Real 13004 Spain
| | | | - Victoria Muñoz-Martinez
- Hospital General Universitario de Ciudad Real (HGUCR) C/Obispo Rafael Torija S/N Ciudad Real 13005 Spain
| | - Luis Beato-Fernandez
- Hospital General Universitario de Ciudad Real (HGUCR) C/Obispo Rafael Torija S/N Ciudad Real 13005 Spain
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13
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Episodic Prenatal Exposure To Ethanol Affects Postnatal Neurogenesis In The Macaque Dentate Gyrus And Visual Recognition Memory. Int J Dev Neurosci 2019; 79:65-75. [PMID: 31706015 DOI: 10.1016/j.ijdevneu.2019.10.005] [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: 06/26/2019] [Revised: 08/28/2019] [Accepted: 10/11/2019] [Indexed: 11/23/2022] Open
Abstract
Fetal alcohol syndrome (FAS) is a prime cause of cognitive dysfunction. The present study tested the hypotheses (a) that gestational ethanol exposure results in deficits in hippocampal-related behaviors and associated neurogenesis and (b) that the period of gastrulation is a time of vulnerability. Pregnant macaques were intubated with ethanol or saline once per week for 3, 6, or 24 weeks. Exposures included or omitted the period of gastrulation. Offspring were given behavioral tests including a Visual-Paired Comparison (VPC), a hippocampal-associated memory task, and euthanized as adolescents. Their dentate gyri were processed for immunohistochemical identification of cells passing through the cell cycle (Ki-67 and proliferating cell nuclear antigen), exiting the cell cycle (p21), or passing through early stages of neuronal morphogenesis (Tuj1). Performance in neurobehavioral tasks was unaffected by ethanol exposure, the notable exception being performance in the VPC that was poorer for macaques exposed to ethanol including gastrulation. Anatomical studies show that the expression of Ki-67 was greater and ratio of p21-positive cells to the ratio of Ki-67-expressing cells was lower in animals in which the ethanol exposure included gastrulation. On the other hand, no ethanol-induced differences in TuJ1 expression were detected. Thus, the dentate gyrus is a bellwether of long-term consequences of gestational ethanol exposure. Targeted effects of ethanol on early neural generation (cell cycle and cycle exit) correlate with the timing-dependent degradation in VPC performance and exposure during gastrulation results in notable deficits. These changes evidence a pattern of fetal programming underlying FAS.
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Schneider ML, Moore CF, Ahlers EO, Barnhart TE, Christian BT, DeJesus OT, Engle JW, Holden JE, Larson JA, Moirano JM, Murali D, Nickles RJ, Resch LM, Converse AK. PET Measures of D1, D2, and DAT Binding Are Associated With Heightened Tactile Responsivity in Rhesus Macaques: Implications for Sensory Processing Disorder. Front Integr Neurosci 2019; 13:29. [PMID: 31379528 PMCID: PMC6652150 DOI: 10.3389/fnint.2019.00029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 07/02/2019] [Indexed: 01/11/2023] Open
Abstract
Sensory processing disorder (SPD), a developmental regulatory condition characterized by marked under- or over-responsivity to non-noxious sensory stimulation, is a common but poorly understood disorder that can profoundly affect mood, cognition, social behavior and adaptive life skills. Little is known about the etiology and neural underpinnings. Clinical research indicates that children with SPD show greater prevalence of difficulties in complex cognitive behavior including working memory, behavioral flexibility, and regulation of sensory and affective functions, which are related to prefrontal cortex (PFC), striatal, and midbrain regions. Neuroimaging may provide insight into mechanisms underlying SPD, and animal experiments provide important evidence that is not available in human studies. Rhesus monkeys (N = 73) were followed over a 20-year period from birth into old age. We focused on a single sensory modality, the tactile system, measured at 5-7 years, because of its critical importance for nourishment, attachment, and social reward in development. Positron emission tomography imaging was conducted at ages 12-18 years to quantify the availability of the D1 and D2 subtypes of the DA receptor (D1R and D2R), and the DA transporter (DAT). Heightened tactile responsivity was related to (a) elevated D1R in PFC overall, including lateral, ventrolateral, medial, anterior cingulate (aCg), frontopolar, and orbitofrontal (OFC) subregions, as well as nucleus accumbens (Acb), (b) reduced D2R in aCg, OFC, and substantia nigra/ventral tegmental area, and (c) elevated DAT in putamen. These findings suggest a mechanism by which DA pathways may be altered in SPD. These pathways are associated with reward processing and pain regulation, providing top-down regulation of sensory and affective processes. The balance between top-down cognitive control in the PFC-Acb pathway and bottom-up motivational function of the VTA-Acb-PFC pathway is critical for successful adaptive function. An imbalance in these two systems might explain DA-related symptoms in children with SPD, including reduced top-down regulatory function and exaggerated responsivity to stimuli. These results provide more direct evidence that SPD may involve altered DA receptor and transporter function in PFC, striatal, and midbrain regions. More work is needed to extend these results to humans.
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Affiliation(s)
- Mary L Schneider
- Occupational Therapy Program, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, United States.,Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI, United States
| | - Colleen F Moore
- Department of Psychology, University of Wisconsin-Madison, Madison, WI, United States.,Department of Psychology, Montana State University, Bozeman, MT, United States
| | - Elizabeth O Ahlers
- Waisman Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Todd E Barnhart
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Bradley T Christian
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Onofre T DeJesus
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Jonathan W Engle
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - James E Holden
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Julie A Larson
- Occupational Therapy Program, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, United States.,Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI, United States
| | - Jeffrey M Moirano
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Dhanabalan Murali
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Robert J Nickles
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, United States
| | - Leslie M Resch
- Occupational Therapy Program, Department of Kinesiology, University of Wisconsin-Madison, Madison, WI, United States.,Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI, United States
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15
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Regular Music Exposure in Juvenile Rats Facilitates Conditioned Fear Extinction and Reduces Anxiety after Foot Shock in Adulthood. BIOMED RESEARCH INTERNATIONAL 2019; 2019:8740674. [PMID: 31380440 PMCID: PMC6662454 DOI: 10.1155/2019/8740674] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/31/2019] [Accepted: 06/18/2019] [Indexed: 11/18/2022]
Abstract
Music exposure is known to play a positive role in learning and memory and can be a complementary treatment for anxiety and fear. However, whether juvenile music exposure affects adult behavior is not known. Two-week-old Sprague-Dawley rats were exposed to music for 2 hours daily or to background noise (controls) for a period of 3 weeks. At 60 days of age, rats were subjected to auditory fear conditioning, fear extinction training, and anxiety-like behavior assessments or to anterior cingulate cortex (ACC) brain-derived neurotrophic factor (BDNF) assays. We found that the music-exposed rats showed significantly less freezing behaviors during fear extinction training and spent more time in the open arm of the elevated plus maze after fear conditioning when compared with the control rats. Moreover, the BDNF levels in the ACC in the music group were significantly higher than those of the controls with the fear conditioning session. This result suggests that music exposure in juvenile rats decreases anxiety-like behaviors, facilitates fear extinction, and increases BDNF levels in the ACC in adulthood after a stressful event.
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16
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The Effect of Prenatal Stress on Auditory Brainstem Responses in Rat Pups. HEALTH SCOPE 2018. [DOI: 10.5812/jhealthscope.55019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Examining the Reversibility of Long-Term Behavioral Disruptions in Progeny of Maternal SSRI Exposure. eNeuro 2018; 5:eN-NWR-0120-18. [PMID: 30073191 PMCID: PMC6071194 DOI: 10.1523/eneuro.0120-18.2018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/07/2018] [Accepted: 06/07/2018] [Indexed: 12/21/2022] Open
Abstract
Serotonergic dysregulation is implicated in numerous psychiatric disorders. Serotonin plays widespread trophic roles during neurodevelopment; thus perturbations to this system during development may increase risk for neurodevelopmental disorders. Epidemiological studies have examined association between selective serotonin reuptake inhibitor (SSRI) treatment during pregnancy and increased autism spectrum disorder (ASD) risk in offspring. It is unclear from these studies whether ASD susceptibility is purely related to maternal psychiatric diagnosis, or if treatment poses additional risk. We sought to determine whether maternal SSRI treatment alone or in combination with genetically vulnerable background was sufficient to induce offspring behavior disruptions relevant to ASD. We exposed C57BL/6J or Celf6+/- mouse dams to fluoxetine (FLX) during different periods of gestation and lactation and characterized offspring on tasks assessing social communicative interaction and repetitive behavior patterns including sensory sensitivities. We demonstrate robust reductions in pup ultrasonic vocalizations (USVs) and alterations in social hierarchy behaviors, as well as perseverative behaviors and tactile hypersensitivity. Celf6 mutant mice demonstrate social communicative deficits and perseverative behaviors, without further interaction with FLX. FLX re-exposure in adulthood ameliorates the tactile hypersensitivity yet exacerbates the dominance phenotype. This suggests acute deficiencies in serotonin levels likely underlie the abnormal responses to sensory stimuli, while the social alterations are instead due to altered development of social circuits. These findings indicate maternal FLX treatment, independent of maternal stress, can induce behavioral disruptions in mammalian offspring, thus contributing to our understanding of the developmental role of the serotonin system and the possible risks to offspring of SSRI treatment during pregnancy.
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18
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Noor S, Milligan ED. Lifelong Impacts of Moderate Prenatal Alcohol Exposure on Neuroimmune Function. Front Immunol 2018; 9:1107. [PMID: 29910801 PMCID: PMC5992426 DOI: 10.3389/fimmu.2018.01107] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 05/02/2018] [Indexed: 12/26/2022] Open
Abstract
In utero alcohol exposure is emerging as a major risk factor for lifelong aberrant neuroimmune function. Fetal alcohol spectrum disorder encompasses a range of behavioral and physiological sequelae that may occur throughout life and includes cognitive developmental disabilities as well as disease susceptibility related to aberrant immune and neuroimmune actions. Emerging data from clinical studies and findings from animal models support that very low to moderate levels of fetal alcohol exposure may reprogram the developing central nervous system leading to altered neuroimmune and neuroglial signaling during adulthood. In this review, we will focus on the consequences of low to moderate prenatal alcohol exposure (PAE) on neuroimmune interactions during early life and at different stages of adulthood. Data discussed here will include recent studies suggesting that while abnormal immune function is generally minimal under basal conditions, following pathogenic stimuli or trauma, significant alterations in the neuroimmune axis occur. Evidence from published reports will be discussed with a focus on observations that PAE may bias later-life peripheral immune responses toward a proinflammatory phenotype. The propensity for proinflammatory responses to challenges in adulthood may ultimately shape neuron–glial-immune processes suspected to underlie various neuropathological outcomes including chronic pain and cognitive impairment.
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Affiliation(s)
- Shahani Noor
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, United States
| | - Erin D Milligan
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM, United States
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19
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Bolaños AD, Coffman BA, Candelaria-Cook FT, Kodituwakku P, Stephen JM. Altered Neural Oscillations During Multisensory Integration in Adolescents with Fetal Alcohol Spectrum Disorder. Alcohol Clin Exp Res 2017; 41:2173-2184. [PMID: 28944474 DOI: 10.1111/acer.13510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 09/19/2017] [Indexed: 01/22/2023]
Abstract
BACKGROUND Children with fetal alcohol spectrum disorder (FASD), who were exposed to alcohol in utero, display a broad range of sensory, cognitive, and behavioral deficits, which are broadly theorized to be rooted in altered brain function and structure. Based on the role of neural oscillations in multisensory integration from past studies, we hypothesized that adolescents with FASD would show a decrease in oscillatory power during event-related gamma oscillatory activity (30 to 100 Hz), when compared to typically developing healthy controls (HC), and that such decrease in oscillatory power would predict behavioral performance. METHODS We measured sensory neurophysiology using magnetoencephalography (MEG) during passive auditory, somatosensory, and multisensory (synchronous) stimulation in 19 adolescents (12 to 21 years) with FASD and 23 age- and gender-matched HC. We employed a cross-hemisphere multisensory paradigm to assess interhemispheric connectivity deficits in children with FASD. RESULTS Time-frequency analysis of MEG data revealed a significant decrease in gamma oscillatory power for both unisensory and multisensory conditions in the FASD group relative to HC, based on permutation testing of significant group differences. Greater beta oscillatory power (15 to 30 Hz) was also noted in the FASD group compared to HC in both unisensory and multisensory conditions. Regression analysis revealed greater predictive power of multisensory oscillations from unisensory oscillations in the FASD group compared to the HC group. Furthermore, multisensory oscillatory power, for both groups, predicted performance on the Intra-Extradimensional Set Shift Task and the Cambridge Gambling Task. CONCLUSIONS Altered oscillatory power in the FASD group may reflect a restricted ability to process somatosensory and multisensory stimuli during day-to-day interactions. These alterations in neural oscillations may be associated with the neurobehavioral deficits experienced by adolescents with FASD and may carry over to adulthood.
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Affiliation(s)
- Alfredo D Bolaños
- The Mind Research Network and Lovelace Biomedical and Environmental Research Institute, Albuquerque, New Mexico
| | - Brian A Coffman
- The Mind Research Network and Lovelace Biomedical and Environmental Research Institute, Albuquerque, New Mexico.,Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Felicha T Candelaria-Cook
- The Mind Research Network and Lovelace Biomedical and Environmental Research Institute, Albuquerque, New Mexico.,Biomedical Informatics Unit, Health Sciences Library and Informatics Center, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Piyadasa Kodituwakku
- Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Julia M Stephen
- The Mind Research Network and Lovelace Biomedical and Environmental Research Institute, Albuquerque, New Mexico
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Fetal alcohol spectrum disorders: Zebrafish in the analysis of the milder and more prevalent form of the disease. Behav Brain Res 2017; 352:125-132. [PMID: 28988969 DOI: 10.1016/j.bbr.2017.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 02/08/2023]
Abstract
Fetal Alcohol Spectrum Disorders (FASD) represent a large unmet medical need. Exposure of the developing human embryo to alcohol can lead to life-long suffering. Despite the well documented deleterious effects of alcohol on the developing fetus, pregnant women continue to drink alcohol, and FASD remains the leading cause of preventable mental retardation and other behavioral abnormalities. Particularly prevalent are the milder forms of the disease cluster, representing children who do not show obvious physical signs and who may be undiagnosed or misdiagnosed. To develop treatment and diagnostic tools, researchers have turned to animal models. The zebrafish is becoming one of the leading biomedical research organisms that may facilitate discovery of the biological mechanisms underlying this disease and the identification of biomarkers that may be used for diagnosis. Here we review the latest advances of this field, mostly focussing on the discoveries made in our own laboratory and others with zebrafish employed to analyze the effects of moderate to low level of exposure to alcohol. We argue that the zebrafish represents unique advantages, and adding information obtained with this species to the mix of other animal models will significantly increase translational relevance of animal biomedical research for the analysis of human FASD.
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21
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Noor S, Sanchez JJ, Vanderwall AG, Sun MS, Maxwell JR, Davies S, Jantzie LL, Petersen TR, Savage DD, Milligan ED. Prenatal alcohol exposure potentiates chronic neuropathic pain, spinal glial and immune cell activation and alters sciatic nerve and DRG cytokine levels. Brain Behav Immun 2017; 61:80-95. [PMID: 28011263 PMCID: PMC5316367 DOI: 10.1016/j.bbi.2016.12.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 12/18/2016] [Accepted: 12/18/2016] [Indexed: 12/20/2022] Open
Abstract
A growing body of evidence indicates that prenatal alcohol exposure (PAE) may predispose individuals to secondary medical disabilities later in life. Animal models of PAE reveal neuroimmune sequelae such as elevated brain astrocyte and microglial activation with corresponding region-specific changes in immune signaling molecules such as cytokines and chemokines. The aim of this study was to evaluate the effects of moderate PAE on the development and maintenance of allodynia induced by chronic constriction injury (CCI) of the sciatic nerve in adult male rat offspring. Because CCI allodynia requires the actions of glial cytokines, we analyzed lumbar spinal cord glial and immune cell surface markers indicative of their activation levels, as well as sciatic nerve and dorsal root ganglia (DRG) cytokines in PAE offspring in adulthood. While PAE did not alter basal sensory thresholds before or after sham manipulations, PAE significantly potentiated adult onset and maintenance of allodynia. Microscopic analysis revealed exaggerated astrocyte and microglial activation, while flow cytometry data demonstrated increased proportions of immune cells with cell surface major histocompatibility complex II (MHCII) and β-integrin adhesion molecules, which are indicative of PAE-induced immune cell activation. Sciatic nerves from CCI rats revealed that PAE potentiated the proinflammatory cytokines interleukin (IL)-1β, IL-6 and tumor necrosis factor-alpha (TNFα) protein levels with a simultaneous robust suppression of the anti-inflammatory cytokine, IL-10. A profound reduction in IL-10 expression in the DRG of PAE neuropathic rats was also observed. Taken together, our results provide novel insights into the vulnerability that PAE produces for adult-onset central nervous system (CNS) pathological conditions from peripheral nerve injury.
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Affiliation(s)
- Shahani Noor
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Joshua J Sanchez
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Arden G Vanderwall
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA; Department of Anesthesiology and Critical Care Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Melody S Sun
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Jessie R Maxwell
- Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Suzy Davies
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Lauren L Jantzie
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA; Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Timothy R Petersen
- Department of Anesthesiology and Critical Care Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Daniel D Savage
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA; Department of Pediatrics, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA
| | - Erin D Milligan
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131-0001, USA.
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Schneider ML, Moore CF, Adkins M, Barr CS, Larson JA, Resch LM, Roberts A. Sensory Processing in Rhesus Monkeys: Developmental Continuity, Prenatal Treatment, and Genetic Influences. Child Dev 2017; 88:183-197. [PMID: 27338151 PMCID: PMC5424533 DOI: 10.1111/cdev.12572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neonatal sensory processing (tactile and vestibular function) was tested in 78 rhesus macaques from two experiments. At ages 4-5 years, striatal dopamine D2 receptor binding was examined using positron emission tomography. At ages 5-7 years, adult sensory processing was assessed. Findings were: (a) prenatal stress exposure yielded less optimal neonatal sensory processing; (b) animals carrying the short rh5-HTTLPR allele had less optimal neonatal sensory scores than monkeys homozygous for the long allele; (c) neonatal sensory processing was significantly related to striatal D2 receptor binding for carriers of the short allele, but not for animals homozygous for the long allele; and (d) there was moderate developmental continuity in sensory processing from the neonatal period to adulthood.
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Affiliation(s)
- Mary L Schneider
- Department of Kinesiology, University of Wisconsin-Madison
- Harlow Center for Biological Psychology, University of Wisconsin-Madison
- Department of Psychology, University of Wisconsin-Madison
| | - Colleen F Moore
- Department of Psychology, University of Wisconsin-Madison
- Department of Psychology, Montana State University-Bozeman
| | - Miriam Adkins
- Department of Kinesiology, University of Wisconsin-Madison
| | | | - Julie A Larson
- Department of Kinesiology, University of Wisconsin-Madison
- Harlow Center for Biological Psychology, University of Wisconsin-Madison
| | - Leslie M Resch
- Department of Kinesiology, University of Wisconsin-Madison
- Harlow Center for Biological Psychology, University of Wisconsin-Madison
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Green D, Lim M, Lang B, Pohl K, Turk J. Sensory Processing Difficulties in Opsoclonus-Myoclonus Syndrome: A Pilot Project of Presentation and Possible Prevalence. J Child Neurol 2016; 31:965-70. [PMID: 26994071 DOI: 10.1177/0883073816634856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 12/13/2015] [Indexed: 11/16/2022]
Abstract
Opsoclonus-myoclonus syndrome is a rare but serious neurological condition resulting in loss of control of eye movements, often accompanied by difficulties in posture and movement control with reports of sensory sensitivities potentially impacting on behavior. This pilot study characterizes the presence of atypical sensory behaviors in opsoclonus-myoclonus syndrome through questionnaire survey of a cohort of families. The Short Sensory Profile, Vineland Adaptive Behavior Scale, and Developmental Behaviour Checklist were distributed to 30 families; 16 were returned anonymously. Atypical sensory behaviors were identified in a large proportion (62.5%). Children reported as being more anxious showed greater sensitivity to auditory stimuli, U(14) 11, P = .026. This is consistent with recent recognition of more extensive disease neurocognitive effects in Opsoclonus-myoclonus syndrome. Further research is needed to increase understanding of the complex pathology of this disease and to provide indicators for sensory and behavioral as well as pharmacological interventions.
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Affiliation(s)
- Dido Green
- Centre for Rehabilitation, Oxford Brookes University, Oxford, UK
| | - Ming Lim
- Paediatric Neurosciences, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, King's Health Partners Academic Health Science Centre, London, UK Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Bethan Lang
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Keith Pohl
- Paediatric Neurosciences, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, King's Health Partners Academic Health Science Centre, London, UK
| | - Jeremy Turk
- Southwark Child & Adolescent Mental Health Neurodevelopmental Service, South London & Maudsley NHS Foundation Trust, London, UK
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Driscoll CA, Barr CS. Studying longitudinal trajectories in animal models of psychiatric illness and their translation to the human condition. Neurosci Res 2015; 102:67-77. [PMID: 26276350 DOI: 10.1016/j.neures.2015.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 08/03/2015] [Accepted: 08/04/2015] [Indexed: 10/23/2022]
Abstract
Many forms of psychopathology and/or psychiatric illness can occur through the pathways of altered environmental sensitivity, impulsivity, social functioning, and anxious responding. While these traits are also heritable, environmental conditions are known to play a critical role. The genetic factors that contribute to these traits may be adaptive in certain contexts, but can - under the environmental conditions commonly faced among modern humans - also be key moderators of risk for psychopathological outcomes. This article will discuss how animal studies inform us of the various environmental mechanisms through which prenatal or early postnatal environmental challenge can produce long-term effects on behavior and will briefly address how pre-copulatory, pre-natal and early postnatal epigenetic effects can contribute to persistent alterations in offspring behavior. Its main focus will be how nonhuman primate studies have helped us to understand how genetic vulnerability factors can moderate responses to early environmental factors, suggesting pathways through which early stress might produce long-term effects, thus pointing to systems that might moderate risk for psychiatric illnesses in humans.
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Affiliation(s)
- Carlos A Driscoll
- Section of Comparative Behavioral Genomics, NIH/NIAAA/LNG, 5625 Fishers Lane, 3S-32, Bethesda, MD 20852, USA
| | - Christina S Barr
- Section of Comparative Behavioral Genomics, NIH/NIAAA/LNG, 5625 Fishers Lane, 3S-32, Bethesda, MD 20852, USA.
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25
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Burke MW, Ptito M, Ervin FR, Palmour RM. Hippocampal neuron populations are reduced in vervet monkeys with fetal alcohol exposure. Dev Psychobiol 2015; 57:470-85. [PMID: 25913787 PMCID: PMC4437182 DOI: 10.1002/dev.21311] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 03/11/2015] [Indexed: 12/16/2022]
Abstract
Prenatal exposure to beverage alcohol is a major cause of mild mental retardation and developmental delay. In nonendangered alcohol-preferring vervet monkeys, we modeled the most common nondysmorphic form of fetal alcohol syndrome disorder with voluntary drinking during the third trimester of pregnancy. Here, we report significant numerical reductions in the principal hippocampal neurons of fetal alcohol-exposed (FAE) offspring, as compared to age-matched, similarly housed conspecifics with isocaloric sucrose exposure. These deficits, particularly marked in CA1 and CA3, are present neonatally and persist through infancy (5 months) and juvenile (2 years) stages. Although the volumes of hippocampal subdivisions in FAE animals are not atypical at birth, by age 2, they are only 65-70% of those estimated in age-matched controls. These data suggest that moderate, naturalistic alcohol consumption during late pregnancy results in a stable loss of hippocampal neurons and a progressive reduction of hippocampal volume.
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Affiliation(s)
- Mark W Burke
- Department of Physiology and Biophysics, Howard University, Washington DC; Behavioural Science Foundation, St Kitts
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26
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Patten AR, Fontaine CJ, Christie BR. A comparison of the different animal models of fetal alcohol spectrum disorders and their use in studying complex behaviors. Front Pediatr 2014; 2:93. [PMID: 25232537 PMCID: PMC4153370 DOI: 10.3389/fped.2014.00093] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 08/20/2014] [Indexed: 12/31/2022] Open
Abstract
Prenatal ethanol exposure (PNEE) has been linked to widespread impairments in brain structure and function. There are a number of animal models that are used to study the structural and functional deficits caused by PNEE, including, but not limited to invertebrates, fish, rodents, and non-human primates. Animal models enable a researcher to control important variables such as the route of ethanol administration, as well as the timing, frequency and amount of ethanol exposure. Each animal model and system of exposure has its place, depending on the research question being undertaken. In this review, we will examine the different routes of ethanol administration and the various animal models of fetal alcohol spectrum disorders (FASD) that are commonly used in research, emphasizing their strengths and limitations. We will also present an up-to-date summary on the effects of prenatal/neonatal ethanol exposure on behavior across the lifespan, focusing on learning and memory, olfaction, social, executive, and motor functions. Special emphasis will be placed where the various animal models best represent deficits observed in the human condition and offer a viable test bed to examine potential therapeutics for human beings with FASD.
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Affiliation(s)
- Anna R Patten
- Division of Medical Sciences, University of Victoria , Victoria, BC , Canada
| | | | - Brian R Christie
- Division of Medical Sciences, University of Victoria , Victoria, BC , Canada ; Department of Biology, University of Victoria , Victoria, BC , Canada ; Program in Neuroscience, The Brain Research Centre, University of British Columbia , Vancouver, BC , Canada ; Department of Cellular and Physiological Sciences, University of British Columbia , Vancouver, BC , Canada
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Chokroborty-Hoque A, Alberry B, Singh SM. Exploring the complexity of intellectual disability in fetal alcohol spectrum disorders. Front Pediatr 2014; 2:90. [PMID: 25207264 PMCID: PMC4143882 DOI: 10.3389/fped.2014.00090] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 08/11/2014] [Indexed: 01/16/2023] Open
Abstract
Brain development in mammals is long lasting. It begins early during embryonic growth and is finalized in early adulthood. This progression represents a delicate choreography of molecular, cellular, and physiological processes initiated and directed by the fetal genotype in close interaction with environment. Not surprisingly, most aberrations in brain functioning including intellectual disability (ID) are attributed to either gene(s), or environment or the interaction of the two. The ensuing complexity has made the assessment of this choreography, ever challenging. A model to assess this complexity has used a mouse model (C57BL/6J or B6) that is subjected to prenatal alcohol exposure. The resulting pups show learning and memory deficits similar to patients with fetal alcohol spectrum disorder (FASD), which is associated with life-long changes in gene expression. Interestingly, this change in gene expression underlies epigenetic processes including DNA methylation and miRNAs. This paradigm is applicable to ethanol exposure at different developmental times (binge at trimesters 1, 2, and 3 as well as continuous preference drinking (70%) of 10% alcohol by B6 females during pregnancy). The exposure leads to life-long changes in neural epigenetic marks, gene expression, and a variety of defects in neurodevelopment and CNS function. We argue that this cascade may be reversed postnatally via drugs, chemicals, and environment including maternal care. Such conclusions are supported by two sets of results. First, antipsychotic drugs that are used to treat ID including psychosis function via changes in DNA methylation, a major epigenetic mark. Second, post-natal environment may improve (with enriched environments) or worsen (with negative and maternal separation stress) the cognitive ability of pups that were prenatally exposed to ethanol as well as their matched controls. In this review, we will discuss operational epigenetic mechanisms involved in the development of intellectual ability/disability in response to alcohol during prenatal or post-natal development. In doing so, we will explore the potential of epigenetic manipulation in the treatment of FASD and related disorders implicated in ID.
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Affiliation(s)
| | - Bonnie Alberry
- Molecular Genetics Unit, Department of Biology, University of Western Ontario , London, ON , Canada
| | - Shiva M Singh
- Molecular Genetics Unit, Department of Biology, University of Western Ontario , London, ON , Canada
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Infant cortisol and behavioral habituation to weekly maternal separations: links with maternal prenatal cortisol and psychosocial stress. Psychoneuroendocrinology 2013; 38:2863-74. [PMID: 24103888 DOI: 10.1016/j.psyneuen.2013.07.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 07/09/2013] [Accepted: 07/23/2013] [Indexed: 12/26/2022]
Abstract
INTRODUCTION Our aim was to examine infants' behavioral and physiological stress responses to three weekly maternal separations, in relation to maternal prenatal psychosocial stress and cortisol. The hypothesis was that more prenatal stress and higher cortisol concentrations would predict smaller decreases in negative behavior and cortisol responses over the separations (i.e. less habituation). METHODS General and pregnancy-related feelings of stress and anxiety, as well as circadian cortisol levels, were measured in 107 mothers in the third trimester of pregnancy. At 9 months of age, infants were subjected to three weekly 1-h maternal separations in their homes. Salivary cortisol was obtained from the infants prior to the separation and at 35, 75, and 90 min after the mother had left. For each separation, the area under the curve to the ground (AUCg) was calculated to measure the infants' cortisol response, and the sum of the time spent crying and fussing was calculated to measure the infants' behavioral response. RESULTS Maternal pregnancy cortisol awakening response (CAR) significantly predicted infants' cortisol and behavioral responses. A lower CAR was related to a decreasing cortisol response, while a higher CAR was related to a stable cortisol response over all separations, as well as to less crying and fussing over all separations. CONCLUSIONS Increased maternal prenatal stress, as measured by the CAR, is related to altered behavioral and cortisol responses to a repeated stressor in the 9-month-old infant. These responses might result in prolonged periods with high cortisol levels that may affect the child's development.
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Converse AK, Moore CF, Moirano JM, Ahlers EO, Larson JA, Engle JW, Barnhart TE, Murali D, Christian BT, DeJesus OT, Holden JE, Nickles RJ, Schneider ML. Prenatal stress induces increased striatal dopamine transporter binding in adult nonhuman primates. Biol Psychiatry 2013; 74:502-10. [PMID: 23726316 PMCID: PMC3775901 DOI: 10.1016/j.biopsych.2013.04.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 04/22/2013] [Accepted: 04/25/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND To determine the effects in adult offspring of maternal exposure to stress and alcohol during pregnancy, we imaged striatal and midbrain dopamine transporter (DAT) binding by positron emission tomography in rhesus monkeys (Macaca mulatta). We also evaluated the relationship between DAT binding and behavioral responses previously found to relate to dopamine D2 receptor density (responsivity to tactile stimuli, performance on a learning task, and behavior during a learning task). METHODS Subjects were adult offspring derived from a 2 × 2 experiment in which pregnant monkeys were randomly assigned to control, daily mild stress exposure (acoustic startle), voluntary consumption of moderate-level alcohol, or both daily stress and alcohol. Adult offspring (n = 38) were imaged by positron emission tomography with the DAT ligand [(18)F]2β-carbomethoxy-3β-(4-chlorophenyl)-8-(2-fluoroethyl)-nortropane ([(18)F]FECNT). RESULTS Results showed that prenatal stress yielded an overall increase of 15% in [(18)F]FECNT binding in the striatum (p = .016), 17% greater binding in the putamen (p = .012), and 13% greater binding in the head of the caudate (p = .028) relative to animals not exposed to prenatal stress. Striatal [(18)F]FECNT binding correlated negatively with habituation to repeated tactile stimulation and positively with tactile responsivity. There were no significant effects of prenatal alcohol exposure on [(18)F]FECNT binding. CONCLUSIONS Maternal exposure to mild daily stress during pregnancy yielded increases in striatal DAT availability that were apparent in adult offspring and were associated with behavioral characteristics reflecting tactile hyperresponsivity, a condition associated with problem behaviors in children.
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Affiliation(s)
- Alexander K. Converse
- Waisman Center, University of Wisconsin-Madison,Corresponding author: , tel. 001/608/265.6604, T123 Waisman Center, University of Wisconsin-Madison, Madison, WI 53704
| | | | | | | | - Julie A. Larson
- Harlow Center for Biological Psychology, University of Wisconsin-Madison,Department of Kinesiology, University of Wisconsin-Madison
| | | | | | | | | | | | - James E. Holden
- Department of Medical Physics, University of Wisconsin-Madison
| | | | - Mary L. Schneider
- Harlow Center for Biological Psychology, University of Wisconsin-Madison,Department of Psychology, University of Wisconsin-Madison,Department of Kinesiology, University of Wisconsin-Madison
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Schneider ML, Larson JA, Rypstat CW, Resch LM, Roberts A, Moore CF. Moderate-level prenatal alcohol exposure enhances acoustic startle magnitude and disrupts prepulse inhibition in adult rhesus monkeys. Alcohol Clin Exp Res 2013; 37:1729-36. [PMID: 23763712 DOI: 10.1111/acer.12151] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 02/10/2013] [Indexed: 02/06/2023]
Abstract
BACKGROUND Prenatal alcohol exposure can contribute to a wide range of neurodevelopmental impairments in children and adults including behavioral and neuropsychiatric disorders. In rhesus monkeys, we examined whether moderate-level prenatal alcohol exposure would alter acoustic startle responses and prepulse inhibition (PPI) of the acoustic startle. PPI is a highly quantifiable measure of inhibitory neural processes or sensorimotor gating associated with neuropsychiatric disorders. METHODS Acoustic startle and PPI of the acoustic startle were tested in 37 adult rhesus monkeys (Macaca mulatta) from 4 experimental conditions: (i) moderate-level prenatal alcohol-exposed, (ii) prenatally stressed, (iii) moderate-level prenatal alcohol-exposed + prenatally stressed, and (iv) sucrose controls. RESULTS Prenatal alcohol-exposed monkeys showed a higher magnitude of acoustic startle response and disrupted PPI compared with monkeys not exposed to alcohol prenatally. Monkeys in all conditions showed higher hypothalamic-pituitary-adrenocortical (HPA) axis responses after undergoing the startle procedure, but HPA responses were unrelated to startle response magnitude, latency, or PPI. CONCLUSIONS Finding altered PPI in monkeys prenatally exposed to a moderate dose of alcohol suggests that reduced sensorimotor gating is 1 effect of prenatal alcohol exposure. Because reduced sensorimotor gating is observed in many neuropsychiatric disorders, sensorimotor gating deficits could be an aspect of the comorbidity between fetal alcohol spectrum disorder and mental health conditions.
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Affiliation(s)
- Mary L Schneider
- Department of Kinesiology, University of Wisconsin, Madison, Wisconsin; Harlow Center for Biological Psychology, University of Wisconsin, Madison, Wisconsin; Department of Psychology, University of Wisconsin, Madison, Wisconsin
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Canales L, Gambrell C, Chen J, Neal RE. Prenatal alcohol exposure alters the cerebral cortex proteome in weanling rats. Reprod Toxicol 2013; 39:69-75. [PMID: 23702218 DOI: 10.1016/j.reprotox.2013.04.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 02/19/2013] [Accepted: 04/09/2013] [Indexed: 12/24/2022]
Abstract
Maternal consumption of alcohol during pregnancy impairs neurodevelopment in offspring. Utilizing a rodent model of continuous moderate dose alcohol exposure throughout gestation [gestation day 1 (GD1)-GD22; BAC ~70 mg/dL], the impact of developmental alcohol exposure on juvenile cerebral cortex protein abundances was determined. At weaning, cerebral cortex tissue was collected from pups for 2D SDS-PAGE based proteome analysis with statistical analysis by Partial Least Squares-Discriminant Analysis (PLS-DA). Gestational alcohol exposure increased the abundance of post-translationally modified forms of cytoskeletal proteins and the abundance of proteins within the small molecule biochemistry (includes glucose metabolism) pathway and proteosome processing pathways though ubiquitin conjugating enzymes and chaperones were decreased in abundance. In weanling offspring exposed prenatally to alcohol, alterations in cytoskeletal protein post-translational modifications were noted. Increased abundance of proteins from the small molecule biochemistry pathway, which includes glucose metabolism, and proteosome processing pathways were also noted. Decreased abundances of ubiquitin conjugating enzyme and chaperone protein were noted in the cerebral cortex of these offspring.
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Affiliation(s)
- Lorena Canales
- Department of Environmental and Occupational Health Sciences, School of Public Health and Information Sciences, University of Louisville, Louisville, KY 40292, USA
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Baranek GT, Watson LR, Boyd BA, Poe MD, David FJ, McGuire L. Hyporesponsiveness to social and nonsocial sensory stimuli in children with autism, children with developmental delays, and typically developing children. Dev Psychopathol 2013; 25:307-20. [PMID: 23627946 PMCID: PMC3641693 DOI: 10.1017/s0954579412001071] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This cross-sectional study seeks to (a) describe developmental correlates of sensory hyporesponsiveness to social and nonsocial stimuli, (b) determine whether hyporesponsiveness is generalized across contexts in children with autism relative to controls, and (c) test the associations between hyporesponsiveness and social communication outcomes. Three groups of children ages 11-105 months (N = 178; autism = 63, developmental delay = 47, typical development = 68) are given developmental and sensory measures including a behavioral orienting task (the Sensory Processing Assessment). Lab measures are significantly correlated with parental reports of sensory hyporesponsiveness. Censored regression models show that hyporesponsiveness decreased across groups with increasing mental age (MA). Group differences are significant but depend upon two-way interactions with MA and context (social and nonsocial). At a very young MA (e.g., 6 months), the autism group demonstrates more hyporesponsiveness to social and nonsocial stimuli (with larger effects for social) than developmental delay and typically developing groups, but at an older MA (e.g., 60 months) there are no significant differences. Hyporesponsiveness to social and nonsocial stimuli predicts lower levels of joint attention and language in children with autism. Generalized processes in attention disengagement and behavioral orienting may have relevance for identifying early risk factors of autism and for facilitating learning across contexts to support the development of joint attention and language.
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Affiliation(s)
- Grace T Baranek
- University of North Carolina at Chapel Hill, 27599-7122, USA.
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Structural variations in prefrontal cortex mediate the relationship between early childhood stress and spatial working memory. J Neurosci 2012; 32:7917-25. [PMID: 22674267 DOI: 10.1523/jneurosci.0307-12.2012] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A large corpus of research indicates that exposure to stress impairs cognitive abilities, specifically executive functioning dependent on the prefrontal cortex (PFC). We collected structural MRI scans (n = 61), well-validated assessments of executive functioning, and detailed interviews assessing stress exposure in humans to examine whether cumulative life stress affected brain morphometry and one type of executive functioning, spatial working memory, during adolescence-a critical time of brain development and reorganization. Analysis of variations in brain structure revealed that cumulative life stress and spatial working memory were related to smaller volumes in the PFC, specifically prefrontal gray and white matter between the anterior cingulate and the frontal poles. Mediation analyses revealed that individual differences in prefrontal volumes accounted for the association between cumulative life stress and spatial working memory. These results suggest that structural changes in the PFC may serve as a mediating mechanism through which greater cumulative life stress engenders decrements in cognitive functioning.
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The applicability of the short sensory profile for screening sensory processing disorders among Israeli children. Int J Rehabil Res 2012; 33:311-8. [PMID: 20571410 DOI: 10.1097/mrr.0b013e32833abe59] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The objective of this study was to examine the applicability of the short sensory profile (SSP) for screening sensory processing disorders (SPDs) among typical children in Israel, and to evaluate the relationship between SPDs and socio-demographic parameters. Participants were 395 Israeli children, aged 3 years to 10 years 11 months, with typical development. Parents of all children completed the SSP. Factor analysis found similarity between the Hebrew version of the SSP and the original SSP. About 15% of the children had SPD. Differences between age groups and sexes were found in several SSP sections. In conclusion,typical children may have SPD. The SSP may be appropriate for screening SPD among Israeli children.These results should be strengthened by additional studies conducted on children with typical development as well as children with disabilities in which sensory processing problems are involved.
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Engel-Yeger B. Validating the Adolescent/Adult Sensory Profile and Examining its Ability to Screen Sensory Processing Difficulties among Israeli People. Br J Occup Ther 2012. [DOI: 10.4276/030802212x13418284515839] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Purpose: The purpose of this study was to (1) validate the Hebrew version of the Adolescent/Adult Sensory Profile (AASP); (2) screen sensory processing difficulties, as expressed in daily living in a vast range of ages of healthy Israeli adolescents, adults and older people; and (3) examine gender effect on sensory processing in the different age groups. Findings: Good internal consistency was found for each of the AASP quadrants, although factor analysis did not find total similarity between the Hebrew version of the AASP and the original AASP. Sensory processing difficulties were shown by 22–42% of the participants in the different age groups. Older participants had lower tendency for Sensation Seeking. Females were more sensitive than males in the age groups of 11–17 years and 18–64 years. Conclusion: In general, the Hebrew version of the AASP was found to be valid and succeeded in profiling sensory processing difficulties along the life span of typical Israeli adolescents and adults. Further studies should apply the Hebrew version of the AASP to screen sensory processing difficulties among individuals with disabilities and elaborate their impact on people's performance/participation in daily activities.
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Valenzuela CF, Morton RA, Diaz MR, Topper L. Does moderate drinking harm the fetal brain? Insights from animal models. Trends Neurosci 2012; 35:284-92. [PMID: 22402065 PMCID: PMC3348364 DOI: 10.1016/j.tins.2012.01.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Revised: 01/21/2012] [Accepted: 01/30/2012] [Indexed: 10/28/2022]
Abstract
Although public health campaigns advise pregnant women to abstain from ethanol, drinking during pregnancy is pervasive. Here, we highlight recent studies that have clearly demonstrated long-lasting neurobehavioral deficits in the offspring of laboratory animals exposed to moderate levels of ethanol during development. Alterations in learning, memory, motor coordination, social behavior, and stress responses were identified in these animals. Increased vulnerability to substance abuse was also demonstrated. These behavioral alterations have been associated with impairments in neurotransmitter systems, neuromodulators, and/or synaptic plasticity in several brain regions. With this review we hope to contribute to a better appreciation of the potential effects of developmental exposure to moderate ethanol levels, leading to better interventions aimed at relieving fetal alcohol spectrum disorders.
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Affiliation(s)
- C Fernando Valenzuela
- Department of Neurosciences, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA.
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Abstract
OBJECTIVE The study addresses risk factors and cause of pediatric sensory over-responsivity (SOR) in a large sample of twins. At age 2 years, (a) the association of temperamental traits with concurrent SOR; (b) the association of prenatal complications with SOR; (c) the association of having a male cotwin with female SOR; and (d) the common and unique genetic causes of temperament and SOR symptoms are examined. METHODS The sample included 1026 twin pairs (mean age = 2 years 2 months) from a population-based longitudinal study. Auditory and tactile SOR symptom domains were partially independent and thus were examined separately. RESULTS Temperamental negative affect and fear were moderately correlated with auditory and tactile SOR symptoms. Prenatal complications significantly predicted tactile symptoms after controlling for child characteristics. In addition, females with a male cotwin showed greater SOR at age 2 years than same-sex female dizygotic twins, suggesting a possible risk associated with in utero testosterone exposure. Both auditory and tactile SOR domains were heritable. Bivariate genetic analyses showed that each SOR domain had a similar genetic relationship with fear and negative affect. CONCLUSION The findings suggest partially nonoverlapping causes and risk factors for tactile versus auditory SOR and indicate that prenatal factors warrant further investigation.
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Schneider ML, Moore CF, Adkins MM. The effects of prenatal alcohol exposure on behavior: rodent and primate studies. Neuropsychol Rev 2011; 21:186-203. [PMID: 21499982 PMCID: PMC4226068 DOI: 10.1007/s11065-011-9168-8] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 04/03/2011] [Indexed: 01/30/2023]
Abstract
The use of alcohol by women during pregnancy is a continuing problem. In this review the behavioral effects of prenatal alcohol from animal models are described and related to studies of children and adults with FASD. Studies with monkeys and rodents show that prenatal alcohol exposure adversely affects neonatal orienting, attention and motor maturity, as well as activity level, executive function, response inhibition, and sensory processing later in life. The primate moderate dose behavioral findings fill an important gap between human correlational data and rodent mechanistic research. These animal findings are directly translatable to human findings. Moreover, primate studies that manipulated prenatal alcohol exposure and prenatal stress independently show that prenatal stress exacerbates prenatal alcohol-induced behavioral impairments, underscoring the need to consider stress-induced effects in fetal alcohol research. Studies in rodents and primates show long-term effects of prenatal and developmental alcohol exposure on dopamine system functioning, which could underpin the behavioral effects.
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Affiliation(s)
- Mary L Schneider
- Harlow Center for Biological Psychology, University of Wisconsin-Madison, Madison, WI 53715, USA.
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Bartlett RM, Murali D, Nickles RJ, Barnhart TE, Holden JE, DeJesus OT. Assessment of fetal brain uptake of paraquat in utero using in vivo PET/CT imaging. Toxicol Sci 2011; 122:551-6. [PMID: 21546347 DOI: 10.1093/toxsci/kfr104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Prenatal in utero conditions are thought to play a role in the development of adult diseases including Parkinson's disease (PD). Paraquat is a common herbicide with chemical structure similar to 1-methyl-4-phenyl 1,2,3,6-tetrahydropyridine, a neurotoxin known to induce parkinsonism. In order to assess the role of in utero paraquat exposure in PD, uptake in maternal and fetal brains were measured using positron emission tomography (PET)/computed tomography (CT) imaging. Two anesthetized pregnant rhesus macaques in the late second trimester of pregnancy were given bolus iv injections of ¹¹C-paraquat, and whole-body PET/CT imaging was performed. Using maternal ventricular blood pool as the input function, the unidirectional influx rate constants (K(i)s), a measure of the irreversible transport of paraquat from plasma to brain, were calculated for the maternal and fetal brains using Patlak graphical analysis. Results indicate minimal uptake of paraquat by both maternal and fetal brains with average K(i)s of 0.0009 and 0.0016 per minute, respectively. The highest regional cerebral uptake in the maternal brain (0.0009% injected dose) was seen in the pineal gland, a structure known to lack a blood brain barrier. The finding of minimal paraquat uptake in maternal and fetal brains is similar to previous findings in adult male macaques and extends the contention that a single acute paraquat exposure, prenatally or postnatally, is unlikely to play a role in PD.
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Affiliation(s)
- Rachel M Bartlett
- Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin 53706, USA
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The development of sensory over-responsivity from infancy to elementary school. JOURNAL OF ABNORMAL CHILD PSYCHOLOGY 2011; 38:1193-202. [PMID: 20623174 DOI: 10.1007/s10802-010-9435-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Some infants experience atypical levels of over-responsivity to sensations, which limit their ability to interact and explore their environment. Yet, little is known about typical development of over-responsivity during infancy or whether the presence of extreme over-responsivity in infancy is a predictor of clinically significant sensory over-responsivity (SOR) at school-age. This study followed a representative sample of children (n = 521, 47% boys) at four time points from infancy (mean ages in months Year 1 = 18.23, Year 2 = 30.39, Year 3 = 39.40) to elementary school-age (mean age = 7.97 years). SOR was measured via parent report. A latent growth curve model predicting SOR at school age from the intercept and slope of Sensory Sensitivity between Years 1-3 showed excellent fit with the data. Both early sensory sensitivities and change in early sensitivities were associated with SOR status at school-age.
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Roussotte FF, Bramen JE, Nunez SC, Quandt LC, Smith L, O'Connor MJ, Bookheimer SY, Sowell ER. Abnormal brain activation during working memory in children with prenatal exposure to drugs of abuse: the effects of methamphetamine, alcohol, and polydrug exposure. Neuroimage 2010; 54:3067-75. [PMID: 21040792 DOI: 10.1016/j.neuroimage.2010.10.072] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 10/20/2010] [Accepted: 10/24/2010] [Indexed: 10/18/2022] Open
Abstract
Structural and metabolic abnormalities in fronto-striatal structures have been reported in children with prenatal methamphetamine (MA) exposure. The current study was designed to quantify functional alterations to the fronto-striatal circuit in children with prenatal MA exposure using functional magnetic resonance imaging (fMRI). Because many women who use MA during pregnancy also use alcohol, a known teratogen, we examined 50 children (age range 7-15), 19 with prenatal MA exposure, 15 of whom had concomitant prenatal alcohol exposure (the MAA group), 13 with heavy prenatal alcohol but no MA exposure (ALC group), and 18 unexposed controls (CON group). We hypothesized that MA exposed children would demonstrate abnormal brain activation during a visuospatial working memory (WM) "N-Back" task. As predicted, the MAA group showed less activation than the CON group in many brain areas, including the striatum and frontal lobe in the left hemisphere. The ALC group showed less activation than the MAA group in several regions, including the right striatum. We found an inverse correlation between performance and activity in the striatum in both the CON and MAA groups. However, this relationship was significant in the caudate of the CON group but not the MAA group, and in the putamen of the MAA group but not the CON group. These findings suggest that structural damage in the fronto-striatal circuit after prenatal MA exposure leads to decreased recruitment of this circuit during a WM challenge, and raise the possibility that a rewiring of cortico-striatal networks may occur in children with prenatal MA exposure.
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Affiliation(s)
- Florence F Roussotte
- Department of Neurology, David Geffen School of Medicine at UCLA, University of California, Los Angeles, CA 90095-7332, USA.
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Wilbarger J, Gunnar M, Schneider M, Pollak S. Sensory processing in internationally adopted, post-institutionalized children. J Child Psychol Psychiatry 2010; 51:1105-14. [PMID: 20738449 PMCID: PMC3119572 DOI: 10.1111/j.1469-7610.2010.02255.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/METHODS Sensory processing capacities of 8-12-year-old internationally adopted (IA) children who experienced prolonged institutional care (> 12 months with 75% of pre-adoption lives in institutional care) prior to adoption into family environments (PI) were compared to a group of IA children who were adopted early (< 8 months) predominantly from foster care with little or no institutional experience (EA/FC) and another group of non-adopted (NA) children raised by their birth parents in the United States. All children had estimated IQs within the normal range and did not evidence major neurodevelopmental disorders (e.g., cerebral palsy, fetal alcohol syndrome, Down's syndrome). Sensory processing was evaluated with a commonly used parent-report measure and a laboratory assessment. RESULTS Children who had experienced prolonged institutionalization showed higher levels of reactivity to sensation and displayed both more aversion and approach to sensory stimuli than the other groups. The comparison groups (EA/FC & NA) did not differ on any of the sensory processing measures. CONCLUSIONS These results suggest that early institutional rearing which typically involves both sensory and social deprivation is associated with problems in sensory modulation capacities.
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Affiliation(s)
- Julia Wilbarger
- Department of Kinesiology, University of Wisconsin-Madison, WI 53706,USA.
| | - Megan Gunnar
- Institute for Child Development, University of Minnesota-Twin Cities, USA
| | - Mary Schneider
- Department of Kinesiology, University of Wisconsin-Madison; USA, Department of Psychology, University of Wisconsin-Madison, USA
| | - Seth Pollak
- Department of Psychology, University of Wisconsin-Madison, USA
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Reynolds S, Lane SJ, Richards L. Using animal models of enriched environments to inform research on sensory integration intervention for the rehabilitation of neurodevelopmental disorders. J Neurodev Disord 2010; 2:120-32. [PMID: 22127899 PMCID: PMC3164047 DOI: 10.1007/s11689-010-9053-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 05/28/2010] [Indexed: 01/09/2023] Open
Abstract
The field of behavioral neuroscience has been successful in using an animal model of enriched environments for over five decades to measure the rehabilitative and preventative effects of sensory, cognitive and motor stimulation in animal models. Several key principles of enriched environments match those used in sensory integration therapy, a treatment used for children with neurodevelopmental disorders. This paper reviews the paradigm of environmental enrichment, compares animal models of enriched environments to principles of sensory integration treatment, and discusses applications for the rehabilitation of neurodevelopmental disorders. Based on this review, the essential features in the enriched environment paradigm which should be included in sensory integration treatment are multiple sensory experiences, novelty in the environment, and active engagement in challenging cognitive, sensory, and motor tasks. Use of sensory integration treatment may be most applicable for children with anxiety, hypersensitivity, repetitive behaviors or heightened levels of stress. Additionally, individuals with deficits in social behavior, social participation, or impairments in learning and memory may show gains with this type of treatment.
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Affiliation(s)
- Stacey Reynolds
- Department of Occupational Therapy, School of Allied Health Professions, Virginia Commonwealth University, Box 980008, Richmond, VA, 23298, USA,
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Schneider ML, Moore CF, Larson JA, Barr CS, Dejesus OT, Roberts AD. Timing of moderate level prenatal alcohol exposure influences gene expression of sensory processing behavior in rhesus monkeys. Front Integr Neurosci 2009; 3:30. [PMID: 19936317 PMCID: PMC2779096 DOI: 10.3389/neuro.07.030.2009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2009] [Accepted: 10/23/2009] [Indexed: 11/25/2022] Open
Abstract
Sensory processing disorder, characterized by over- or under-responsivity to non-noxious environmental stimuli, is a common but poorly understood disorder. We examined the role of prenatal alcohol exposure, serotonin transporter gene polymorphic region variation (rh5-HTTLPR), and striatal dopamine (DA) function on behavioral measures of sensory responsivity to repeated non-noxious sensory stimuli in macaque monkeys. Results indicated that early gestation alcohol exposure induced behavioral under-responsivity to environmental stimuli in monkeys carrying the short (s) rh5-HTTLPR allele compared to both early-exposed monkeys homozygous for the long (l) allele and monkeys from middle-to-late exposed pregnancies and controls, regardless of genotype. Moreover, prenatal timing of alcohol exposure altered the relationship between sensory scores and DA D2R availability. In early-exposed monkeys, a positive relationship was shown between sensory scores and DA D2R availability, with low or blunted DA function associated with under-responsive sensory function. The opposite pattern was found for the middle-to-late gestation alcohol-exposed group. These findings raise questions about how the timing of prenatal perturbation and genotype contributes to effects on neural processing and possibly alters neural connections.
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Affiliation(s)
- Mary L Schneider
- Department of Kinesiology, University of Wisconsin-Madison Madison, WI, USA
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Miller LJ, Nielsen DM, Schoen SA, Brett-Green BA. Perspectives on sensory processing disorder: a call for translational research. Front Integr Neurosci 2009; 3:22. [PMID: 19826493 PMCID: PMC2759332 DOI: 10.3389/neuro.07.022.2009] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Accepted: 09/03/2009] [Indexed: 11/13/2022] Open
Abstract
THIS ARTICLE EXPLORES THE CONVERGENCE OF TWO FIELDS, WHICH HAVE SIMILAR THEORETICAL ORIGINS: a clinical field originally known as sensory integration and a branch of neuroscience that conducts research in an area also called sensory integration. Clinically, the term was used to identify a pattern of dysfunction in children and adults, as well as a related theory, assessment, and treatment method for children who have atypical responses to ordinary sensory stimulation. Currently the term for the disorder is sensory processing disorder (SPD). In neuroscience, the term sensory integration refers to converging information in the brain from one or more sensory domains. A recent subspecialty in neuroscience labeled multisensory integration (MSI) refers to the neural process that occurs when sensory input from two or more different sensory modalities converge. Understanding the specific meanings of the term sensory integration intended by the clinical and neuroscience fields and the term MSI in neuroscience is critical. A translational research approach would improve exploration of crucial research questions in both the basic science and clinical science. Refinement of the conceptual model of the disorder and the related treatment approach would help prioritize which specific hypotheses should be studied in both the clinical and neuroscience fields. The issue is how we can facilitate a translational approach between researchers in the two fields. Multidisciplinary, collaborative studies would increase knowledge of brain function and could make a significant contribution to alleviating the impairments of individuals with SPD and their families.
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Affiliation(s)
- Lucy J Miller
- Sensory Processing Disorder Foundation Greenwood Village, CO, USA
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Mennes M, Bergh BVD, Lagae L, Stiers P. Developmental brain alterations in 17 year old boys are related to antenatal maternal anxiety. Clin Neurophysiol 2009; 120:1116-22. [DOI: 10.1016/j.clinph.2009.04.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2008] [Revised: 02/28/2009] [Accepted: 04/07/2009] [Indexed: 01/16/2023]
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Moore CF, Gajewski LL, Laughlin NK, Luck ML, Larson JA, Schneider ML. Developmental lead exposure induces tactile defensiveness in rhesus monkeys (Macaca mulatta). ENVIRONMENTAL HEALTH PERSPECTIVES 2008; 116:1322-1326. [PMID: 18941572 PMCID: PMC2569089 DOI: 10.1289/ehp.11203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Accepted: 05/30/2008] [Indexed: 05/26/2023]
Abstract
BACKGROUND Tactile defensiveness in children is associated with difficult social relations, emotional dysregulation, and inattention. However, there are no studies of lead exposure and tactile defensiveness in children or animals in spite of the fact that lead exposure is also associated with inattention and emotional dysregulation. OBJECTIVES In this study we tested whether lead exposure induces tactile defensiveness in rhesus monkeys. METHODS We tested 61 monkeys from a 3 (no lead, 1-year lead, 2-year lead) x 2 (succimer chelation or not) factorial experiment for tactile defensiveness at 4 years of age. Lead-treated monkeys had been orally administered lead in a daily milk solution from 8 days of life to either 1 or 2 years of age to produce blood lead levels of 35-40 mg/dL. Succimer chelation therapy or placebo was administered at 1 year of age. We measured tactile defensiveness using six repeated trials of each of three textures as a swipe to the cheek and neck. RESULTS Lead-exposed monkeys showed higher negative responses to repeated tactile stimulation compared with controls. Blood lead during the first 3 months of life was positively correlated with the negative response on the tactile defensiveness test. There was an interaction of lead exposure x succimer chelation x trials, but it is not clear that succimer chelation was beneficial with respect to tactile defensiveness. CONCLUSIONS This is the first report to implicate lead as a potential cause of tactile defensiveness. Research should examine whether lead exposure is associated with tactile defensiveness in children.
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Affiliation(s)
| | - Lisa L. Gajewski
- Harlow Center for Biological Psychology
- Department of Kinesiology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Nellie K. Laughlin
- Harlow Center for Biological Psychology
- Psychology Department, Marquette University, Milwaukee, Wisconsin, USA
| | | | - Julie A. Larson
- Harlow Center for Biological Psychology
- Department of Kinesiology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Mary L. Schneider
- Department of Psychology
- Harlow Center for Biological Psychology
- Department of Kinesiology, University of Wisconsin-Madison, Madison, Wisconsin, USA
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