101
|
Luby JL, Baram TZ, Rogers CE, Barch DM. Neurodevelopmental Optimization after Early-Life Adversity: Cross-Species Studies to Elucidate Sensitive Periods and Brain Mechanisms to Inform Early Intervention. Trends Neurosci 2020; 43:744-751. [PMID: 32863044 PMCID: PMC7530018 DOI: 10.1016/j.tins.2020.08.001] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/28/2020] [Accepted: 08/03/2020] [Indexed: 01/01/2023]
Abstract
Human brain development is influenced by early-life experiences, particularly during sensitive periods, with impact on cognitive and emotional outcomes. Understanding how the timing and nature of such experiences (including adversity, trauma, and enrichment) govern their influence on brain organization is crucial for harnessing key environmental factors early in life to enhance brain development. Here we synthesize findings from human and animal studies focusing on sensitive periods and their regional and circuit specificity and highlight the challenge and power of such cross-species approaches in informing the 'next steps' to optimize cognitive and emotional health in developing children. We propose designs for neurodevelopmental optimization research programs utilizing randomized enhancement trials in early childhood to inform public health strategies on prevention and early intervention.
Collapse
Affiliation(s)
- Joan L Luby
- Department of Psychiatry, Washington University School of Medicine, Early Emotional Development Program, 4444 Forest Park Avenue, St. Louis, MO, USA.
| | - Tallie Z Baram
- Departments of Pediatrics, Anatomy/Neurobiology, and Neurology, University of California, Irvine, Irvine, CA 92697, USA
| | - Cynthia E Rogers
- Department of Psychiatry, Washington University School of Medicine, Early Emotional Development Program, 4444 Forest Park Avenue, St. Louis, MO, USA
| | - Deanna M Barch
- Department of Psychiatry, Washington University School of Medicine, Early Emotional Development Program, 4444 Forest Park Avenue, St. Louis, MO, USA; Department of Psychological and Brain Sciences, Washington University in St. Louis, St. Louis, MO 63130, USA; Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| |
Collapse
|
102
|
Spyrka J, Gugula A, Rak A, Tylko G, Hess G, Blasiak A. Early life stress-induced alterations in the activity and morphology of ventral tegmental area neurons in female rats. Neurobiol Stress 2020; 13:100250. [PMID: 33344705 PMCID: PMC7739067 DOI: 10.1016/j.ynstr.2020.100250] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/24/2020] [Accepted: 08/30/2020] [Indexed: 01/02/2023] Open
Abstract
Childhood maltreatment, which can take the form of physical or psychological abuse, is experienced by more than a quarter of all children. Early life stress has substantial and long-term consequences, including an increased risk of drug abuse and psychiatric disorders in adolescence and adulthood, and this risk is higher in women than in men. The neuronal mechanisms underlying the influence of early life adversities on brain functioning remain poorly understood; therefore, in the current study, we used maternal separation (MS), a rodent model of early-life neglect, to verify its influence on the properties of neurons in the ventral tegmental area (VTA), a brain area critically involved in reward and motivation processing. Using whole-cell patch-clamp recordings in brain slices from adolescent female Sprague-Dawley rats, we found an MS-induced increase in the excitability of putative dopaminergic (DAergic) neurons selectively in the medial part of the VTA. We also showed an enhancement of excitatory synaptic transmission in VTA putative DAergic neurons. MS-induced alterations in electrophysiology were accompanied by an increase in the diameter of dendritic spine heads on lateral VTA DAergic neurons, although the overall dendritic spine density remained unchanged. Finally, we reported MS-related increases in basal plasma ACTH and corticosterone levels. These results show the long-term consequences of early life stress and indicate the possible neuronal mechanisms of behavioral disturbances in individuals who experience early life neglect. Adversity in early life is a predisposing factor for psychiatric disorders. Maternal separation (MS) increases excitability of dopaminergic VTA neurons. Early life stress enhances excitatory synaptic transmission in the VTA. MS changes morphology of dendritic spine heads on VTA dopaminergic neurons. Early life stress increases basal ACTH and corticosterone levels in adulthood.
Collapse
Affiliation(s)
- Jadwiga Spyrka
- Department of Neurophysiology and Chronobiology, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| | - Anna Gugula
- Department of Neurophysiology and Chronobiology, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| | - Agnieszka Rak
- Department of Physiology and Toxicology of Reproduction, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| | - Grzegorz Tylko
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| | - Grzegorz Hess
- Department of Neurophysiology and Chronobiology, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| | - Anna Blasiak
- Department of Neurophysiology and Chronobiology, Institute of Zoology and Biomedical Research, Jagiellonian University, 30-387, Krakow, Poland
| |
Collapse
|
103
|
Wiss DA, Brewerton TD. Adverse Childhood Experiences and Adult Obesity: A Systematic Review of Plausible Mechanisms and Meta-Analysis of Cross-Sectional Studies. Physiol Behav 2020; 223:112964. [DOI: 10.1016/j.physbeh.2020.112964] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 05/02/2020] [Accepted: 05/10/2020] [Indexed: 12/14/2022]
|
104
|
Orben A, Tomova L, Blakemore SJ. The effects of social deprivation on adolescent development and mental health. THE LANCET. CHILD & ADOLESCENT HEALTH 2020. [PMID: 32540024 DOI: 10.31234/osf.io/7afmd] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Adolescence (the stage between 10 and 24 years) is a period of life characterised by heightened sensitivity to social stimuli and the increased need for peer interaction. The physical distancing measures mandated globally to contain the spread of COVID-19 are radically reducing adolescents' opportunities to engage in face-to-face social contact outside their household. In this interdisciplinary Viewpoint, we describe literature from a variety of domains that highlight how social deprivation in adolescence might have far-reaching consequences. Human studies have shown the importance of peer acceptance and peer influence in adolescence. Animal research has shown that social deprivation and isolation have unique effects on brain and behaviour in adolescence compared with other stages of life. However, the decrease in adolescent face-to-face contact might be less detrimental due to widespread access to digital forms of social interaction through technologies such as social media. The findings reviewed highlight how physical distancing might have a disproportionate effect on an age group for whom peer interaction is a vital aspect of development.
Collapse
Affiliation(s)
- Amy Orben
- Medical Research Council Cognition and Brain Sciences Unit and Emmanuel College, University of Cambridge, Cambridge, UK
| | - Livia Tomova
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Sarah-Jayne Blakemore
- Department of Psychology, University of Cambridge, Cambridge, UK; UCL Institute of Cognitive Neuroscience, University College London, London, UK.
| |
Collapse
|
105
|
Orben A, Tomova L, Blakemore SJ. The effects of social deprivation on adolescent development and mental health. THE LANCET. CHILD & ADOLESCENT HEALTH 2020; 4:634-640. [PMID: 32540024 PMCID: PMC7292584 DOI: 10.1016/s2352-4642(20)30186-3] [Citation(s) in RCA: 490] [Impact Index Per Article: 122.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 12/18/2022]
Abstract
Adolescence (the stage between 10 and 24 years) is a period of life characterised by heightened sensitivity to social stimuli and the increased need for peer interaction. The physical distancing measures mandated globally to contain the spread of COVID-19 are radically reducing adolescents' opportunities to engage in face-to-face social contact outside their household. In this interdisciplinary Viewpoint, we describe literature from a variety of domains that highlight how social deprivation in adolescence might have far-reaching consequences. Human studies have shown the importance of peer acceptance and peer influence in adolescence. Animal research has shown that social deprivation and isolation have unique effects on brain and behaviour in adolescence compared with other stages of life. However, the decrease in adolescent face-to-face contact might be less detrimental due to widespread access to digital forms of social interaction through technologies such as social media. The findings reviewed highlight how physical distancing might have a disproportionate effect on an age group for whom peer interaction is a vital aspect of development.
Collapse
Affiliation(s)
- Amy Orben
- Medical Research Council Cognition and Brain Sciences Unit and Emmanuel College, University of Cambridge, Cambridge, UK
| | - Livia Tomova
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Sarah-Jayne Blakemore
- Department of Psychology, University of Cambridge, Cambridge, UK; UCL Institute of Cognitive Neuroscience, University College London, London, UK.
| |
Collapse
|
106
|
Impact of early life adversities on human brain functioning: A coordinate-based meta-analysis. Neurosci Biobehav Rev 2020; 113:62-76. [DOI: 10.1016/j.neubiorev.2020.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 01/15/2023]
|
107
|
Kujawa A, Klein DN, Pegg S, Weinberg A. Developmental trajectories to reduced activation of positive valence systems: A review of biological and environmental contributions. Dev Cogn Neurosci 2020; 43:100791. [PMID: 32510349 PMCID: PMC7225621 DOI: 10.1016/j.dcn.2020.100791] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 03/29/2020] [Accepted: 04/18/2020] [Indexed: 12/11/2022] Open
Abstract
Reduced activation of positive valence systems (PVS), including blunted neural and physiological responses to pleasant stimuli and rewards, has been shown to prospectively predict the development of psychopathology. Yet, little is known about how reduced PVS activation emerges across development or what implications it has for prevention. We review genetic, temperament, parenting, and naturalistic and laboratory stress research on neural measures of PVS and outline developmentally-informed models of trajectories of PVS activation. PVS function is partly heritable and appears to reflect individual differences in early-emerging temperament traits. Although lab-induced stressors blunt PVS activation, effects of parenting and naturalistic stress on PVS are mixed and depend on the type of stressor, developmental timing, and interactions amongst risk factors. We propose that there may be multiple, dynamic developmental trajectories to reduced PVS activation in which combinations of genes, temperament, and exposure to severe, prolonged, or uncontrollable stress may exert direct and interactive effects on PVS function. Critically, these risk factors may alter PVS developmental trajectories and/or PVS sensitivity to proximal stressors. Distinct factors may converge such that PVS activation proceeds along a typical, accelerated, chronically low, or stress-reactive trajectory. Finally, we present directions for future research with translational implications.
Collapse
Affiliation(s)
- Autumn Kujawa
- Department of Psychology and Human Development, Vanderbilt University, 230 Appleton Place, Nashville, TN 37203-5721, United States.
| | - Daniel N Klein
- Department of Psychology, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794-2500, United States.
| | - Samantha Pegg
- Department of Psychology and Human Development, Vanderbilt University, 230 Appleton Place, Nashville, TN 37203-5721, United States.
| | - Anna Weinberg
- Department of Psychology, McGill University, 2001 McGill College Avenue, Montreal, Quebec, H3A 1G1, Canada.
| |
Collapse
|
108
|
Short AK, Maras PM, Pham AL, Ivy AS, Baram TZ. Blocking CRH receptors in adults mitigates age-related memory impairments provoked by early-life adversity. Neuropsychopharmacology 2020; 45:515-523. [PMID: 31698409 PMCID: PMC6969076 DOI: 10.1038/s41386-019-0562-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/26/2019] [Accepted: 10/28/2019] [Indexed: 01/06/2023]
Abstract
In humans, early-life adversity is associated with impairments in learning and memory that may emerge later in life. In rodent models, early-life adversity directly impacts hippocampal neuron structure and connectivity with progressive deficits in long-term potentiation and spatial memory function. Previous work has demonstrated that augmented release and actions of the stress-activated neuropeptide, CRH, contribute to the deleterious effects of early-life adversity on hippocampal dendritic arborization, synapse number and memory-function. Early-life adversity increases hippocampal CRH expression, and blocking hippocampal CRH receptor type-1 (CRHR1) immediately following early-life adversity prevented the consequent memory and LTP defects. Here, we tested if blocking CRHR1 in young adults ameliorates early-life adversity-provoked memory deficits later in life. A weeklong course of a CRHR1 antagonist in 2-month-old male rats prevented early-life adversity-induced deficits in object recognition memory that emerged by 12 months of age. Surprisingly, whereas the intervention did not mitigate early-life adversity-induced spatial memory losses at 4 and 8 months, it restored hippocampus-dependent location memory in 12-month-old rats that experienced early-life adversity. Neither early-life adversity nor CRHR1 blockade in the adult influenced anxiety- or depression-related behaviors. Altogether, these findings suggest that cognitive deficits attributable to adversity during early-life-sensitive periods are at least partially amenable to interventions later in life.
Collapse
Affiliation(s)
- Annabel K Short
- Department of Anatomy and Neurobiology, University of California- Irvine, Irvine, CA, USA.
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA.
| | - Pamela M Maras
- Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, USA
| | - Aidan L Pham
- Department of Anatomy and Neurobiology, University of California- Irvine, Irvine, CA, USA
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Autumn S Ivy
- Department of Anatomy and Neurobiology, University of California- Irvine, Irvine, CA, USA
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Tallie Z Baram
- Department of Anatomy and Neurobiology, University of California- Irvine, Irvine, CA, USA
- Department of Pediatrics, University of California-Irvine, Irvine, CA, USA
- Department of Neurology, University of California-Irvine, Irvine, CA, USA
| |
Collapse
|
109
|
Lengvenyte A, Conejero I, Courtet P, Olié E. Biological bases of suicidal behaviours: A narrative review. Eur J Neurosci 2019; 53:330-351. [PMID: 31793103 DOI: 10.1111/ejn.14635] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/05/2019] [Accepted: 11/28/2019] [Indexed: 12/13/2022]
Abstract
Suicidal behaviour is a multifaceted phenomenon that concerns all human populations. It has been suggested that a complex interaction between the individual genetic profile and environmental factors throughout life underlies the pathophysiology of suicidal behaviour. Although epidemiological and genetic studies suggest the existence of a genetic component, exposure to biological and psychosocial adversities, especially during critical developmental periods, also contributes to altering the biological responses to threat and pleasure. This results in amplified maladaptive cognitive and behavioural traits and states associated with suicidal behaviours. Alterations in the cognitive inhibition and decision-making capacity have been implicated in suicidal behaviours. Structural and functional changes in key brain regions and networks, such as prefrontal cortex, insula and default mode network, may underlie this relationship. Furthermore, the shift from health to suicidal behaviour incorporates complex and dynamic changes in the immune and stress responses, monoaminergic system, gonadal system and neuroplasticity. In this review, we describe the major findings of epidemiological, genetic, neuroanatomical, neuropsychological, immunological and neuroendocrinological studies on suicide behaviours to provide a solid background for future research in this field. This broad overview of the biological bases of suicide should promote neuroscience research on suicidal behaviours. This might lead to improved biological models and to the identification of evidence-based biomarkers, treatment options and preventive strategies.
Collapse
Affiliation(s)
- Aiste Lengvenyte
- Department of Emergency Psychiatry & Acute Care, CHU Montpellier, University of Montpellier, Montpellier, France.,Faculty of Medicine, Institute of Clinical Medicine, Psychiatric Clinic, Vilnius University, Vilnius, Lithuania
| | - Ismael Conejero
- Neuropsychiatry: Epidemiological and Clinical Research, Inserm Unit 1061, Montpellier, France.,Department of Psychiatry, CHU Nimes, University of Montpellier, Montpellier, France
| | - Philippe Courtet
- Department of Emergency Psychiatry & Acute Care, CHU Montpellier, University of Montpellier, Montpellier, France.,Neuropsychiatry: Epidemiological and Clinical Research, Inserm Unit 1061, Montpellier, France
| | - Emilie Olié
- Department of Emergency Psychiatry & Acute Care, CHU Montpellier, University of Montpellier, Montpellier, France.,Neuropsychiatry: Epidemiological and Clinical Research, Inserm Unit 1061, Montpellier, France
| |
Collapse
|
110
|
Abstract
John Cacioppo has compared loneliness to hunger or thirst in that it signals that one needs to act and repair what is lacking. This paper reviews Cacioppo's and others' contributions to our understanding of neural mechanisms underlying social motivation in humans and in other social species. We focus particularly on the dopaminergic reward system and try to integrate evidence from animal models and human research. In rodents, objective social isolation leads to increased social motivation, mediated by the brains' mesolimbic dopamine system. In humans, social rejection can lead to either increased or decreased social motivation, and is associated with activity in the insular cortex; while chronic loneliness is typically associated with decreased social motivation but has been associated with altered dopaminergic responses in the striatum. This mixed pattern of cross-species similarities and differences may arise from the substantially different methods used to study unmet social needs across species, and suggests the need for more direct and deliberate cross-species comparative research in this critically important domain.
Collapse
Affiliation(s)
- Livia Tomova
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kay Tye
- Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Rebecca Saxe
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
| |
Collapse
|
111
|
Short AK, Baram TZ. Early-life adversity and neurological disease: age-old questions and novel answers. Nat Rev Neurol 2019; 15:657-669. [PMID: 31530940 PMCID: PMC7261498 DOI: 10.1038/s41582-019-0246-5] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2019] [Indexed: 12/24/2022]
Abstract
Neurological illnesses, including cognitive impairment, memory decline and dementia, affect over 50 million people worldwide, imposing a substantial burden on individuals and society. These disorders arise from a combination of genetic, environmental and experiential factors, with the latter two factors having the greatest impact during sensitive periods in development. In this Review, we focus on the contribution of adverse early-life experiences to aberrant brain maturation, which might underlie vulnerability to cognitive brain disorders. Specifically, we draw on recent robust discoveries from diverse disciplines, encompassing human studies and experimental models. These discoveries suggest that early-life adversity, especially in the perinatal period, influences the maturation of brain circuits involved in cognition. Importantly, new findings suggest that fragmented and unpredictable environmental and parental signals comprise a novel potent type of adversity, which contributes to subsequent vulnerabilities to cognitive illnesses via mechanisms involving disordered maturation of brain 'wiring'.
Collapse
Affiliation(s)
- Annabel K Short
- Departments of Anatomy and Neruobiology, University of California-Irvine, Irvine, CA, USA
- Departments of Pediatrics, University of California-Irvine, Irvine, CA, USA
| | - Tallie Z Baram
- Departments of Anatomy and Neruobiology, University of California-Irvine, Irvine, CA, USA.
- Departments of Pediatrics, University of California-Irvine, Irvine, CA, USA.
- Departments of Neurology, University of California-Irvine, Irvine, CA, USA.
| |
Collapse
|
112
|
Doom JR, Gahagan S, Caballero G, Encina P, Lozoff B. Infant iron deficiency, iron supplementation, and psychosocial stress as predictors of neurocognitive development in Chilean adolescents. Nutr Neurosci 2019; 24:520-529. [PMID: 31397220 DOI: 10.1080/1028415x.2019.1651105] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Objective: The aim of the current study was to examine the unique and joint contributions of iron deficiency, iron supplementation, and psychosocial stress in infancy and stress in adolescence to neurocognitive functioning in adolescence.Methods: The current study (N = 796; Mage = 14.4y) involved a prospective cohort of low- and middle-socioeconomic status adolescents in Santiago, Chile. As infants, they had participated in an iron supplementation trial. Infant iron status was assessed at 12-18 months, and mothers answered questions about family psychosocial stress at 6-12 months and in adolescence (maternal depressive symptoms, home support for child development, stressful life events, father absence, socioeconomic status, and parental education). Neurocognitive functioning was assessed in adolescence using the Balloon Analogue Risk Task, Stockings of Cambridge, Trail Making Test, Purdue Pegboard Test, and Wisconsin Card Sorting Test.Results: Greater psychosocial stress in infancy predicted less risk-taking, poorer planning abilities and fluid cognition, and slower processing speed in adolescence. Iron deficiency anemia in infancy predicted less risk-taking. Greater adolescent psychosocial stress predicted difficulties in set-shifting. There were no interactions between infant psychosocial stress and iron deficiency predicting adolescent neurocognitive functioning.Conclusion: These results suggest that interventions to reduce infant psychosocial stress may be more likely to prevent multiple neurocognitive deficits in adolescence than interventions to reduce infant iron deficiency.
Collapse
Affiliation(s)
- Jenalee R Doom
- Department of Psychology, University of Denver, Denver, CO, USA.,Department of Pediatrics, Medical School, University of Michigan, Ann Arbor, MI, USA.,Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA
| | - Sheila Gahagan
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA.,Division of Child Development and Community Health, University of California, San Diego, CA, USA
| | - Gabriela Caballero
- Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile [alt. Institute of Nutrition and Food Technology, University of Chile], Santiago, Chile
| | - Pamela Encina
- Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile [alt. Institute of Nutrition and Food Technology, University of Chile], Santiago, Chile
| | - Betsy Lozoff
- Department of Pediatrics, Medical School, University of Michigan, Ann Arbor, MI, USA.,Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
113
|
Novick AM, Ross DA. Beyond Broca's area: why undergraduate neuroscience education matters. REVISTA DE MEDICINA 2019; 98:238-240. [PMID: 36200108 PMCID: PMC9531724 DOI: 10.11606/issn.1679-9836.v98i4p238-240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Patients with psychiatric illness often present a unique challenge to medical students: in contrast to some medical conditions, in which patients may seem to be stricken by a disease, patients with certain psychiatric illnesses may seem complicit with the illness. Questions of free will, choice, and the role of the physician can quickly become overwhelming. This may result in students feeling helpless, disinterested, or even resentful. Here we argue that integrating a modern neuroscience perspective into medical education allows students to conceptualize psychiatric patients in a way that promotes empathy and enhances patient care. Specifically, a strong grasp of neuroscience prevents the future physician from falling into dualistic thinking in which the psychosocial aspects of a patient's presentation are considered beyond the realm of medicine. The value of incorporating neuroscience into a full, biopsychosocial formulation is demonstrated with the case example of a "difficult patient."
Collapse
Affiliation(s)
- Andrew M Novick
- Department of Psychiatry and Human Behavior, Alpert Medical School of Brown University, Providence, RI, USA
| | - David A Ross
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
| |
Collapse
|
114
|
Di Segni M, Andolina D, D'Addario SL, Babicola L, Ielpo D, Luchetti A, Pascucci T, Lo Iacono L, D'Amato FR, Ventura R. Sex-dependent effects of early unstable post-natal environment on response to positive and negative stimuli in adult mice. Neuroscience 2019; 413:1-10. [PMID: 31228589 DOI: 10.1016/j.neuroscience.2019.06.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 06/06/2019] [Accepted: 06/11/2019] [Indexed: 01/08/2023]
Abstract
Alterations in early environmental conditions that interfere with the creation of a stable mother-pup bond have been suggested to be a risk factor for the development of stress-related psychopathologies later in life. The long-lasting effects of early experiences are mediated by changes in various cerebral circuits, such as the corticolimbic system, which processes aversive and rewarding stimuli. However, it is evident that the early environment is not sufficient per se to induce psychiatric disorders; interindividual (eg, sex-based) differences in the response to environmental challenges exist. To examine the sex-related effects that are induced by an early experience on later events in adulthood, we determine the enduring effects of repeated cross-fostering (RCF) in female and male C57BL/6J mice. To this end, we assessed the behavioral phenotype of RCF and control (male and female) mice in the saccharine preference test and cocaine-induced conditioned place preference to evaluate the response to natural and pharmacological stimuli and in the elevated plus maze test and forced swimming test to measure their anxiety- and depression-like behavior. We also evaluated FST-induced c-Fos immunoreactivity in various brain regions that are engaged in the response to acute stress exposure (FST). Notably, RCF has opposing effects on the adult response to these tests between sexes, directing male mice toward an "anhedonia-like" phenotype and increasing the sensitivity for rewarding stimuli in female mice.
Collapse
Affiliation(s)
- Matteo Di Segni
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; IRCSS Fondazione Santa Lucia, 00142 Rome, Italy
| | - Diego Andolina
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; IRCSS Fondazione Santa Lucia, 00142 Rome, Italy
| | - Sebastian Luca D'Addario
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; Behavioral Neuroscience PhD Programme, Sapienza University, 00184, Rome, Italy
| | - Lucy Babicola
- Dept. of Applied and Biotechnological Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Donald Ielpo
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; Behavioral Neuroscience PhD Programme, Sapienza University, 00184, Rome, Italy
| | - Alessandra Luchetti
- Cell Biology and Neurobiology Institute, National Research Council, 00143 Rome, Italy
| | - Tiziana Pascucci
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; IRCSS Fondazione Santa Lucia, 00142 Rome, Italy
| | - Luisa Lo Iacono
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; IRCSS Fondazione Santa Lucia, 00142 Rome, Italy
| | - Francesca R D'Amato
- Cell Biology and Neurobiology Institute, National Research Council, 00143 Rome, Italy; Institut Universitaire en Santé Mentale de Québec, Laval University, Quebec, Canada
| | - Rossella Ventura
- Dept. of Psychology and Center "Daniel Bovet", Sapienza University, 00184 Rome, Italy; IRCSS Fondazione Santa Lucia, 00142 Rome, Italy.
| |
Collapse
|
115
|
Mackin DM, Kotov R, Perlman G, Nelson BD, Goldstein BL, Hajcak G, Klein DN. Reward processing and future life stress: Stress generation pathway to depression. JOURNAL OF ABNORMAL PSYCHOLOGY 2019; 128:305-314. [PMID: 31045413 PMCID: PMC6586409 DOI: 10.1037/abn0000427] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Blunted reward sensitivity and life stress are each depressogenic. Additionally, individuals with clinical and psychosocial vulnerabilities are prone to experience or evoke dependent life stressors (e.g., interpersonal conflict) that, in turn, increase depression risk. However, no previous study has investigated the role of neural vulnerability factors in generating life stress. Therefore, the current study investigated whether a neural measure of reward sensitivity prospectively predicts the generation of life stress, which in turn mediates effects of these neural processes on subsequent depression. Participants were 467 never-depressed adolescent girls. Using event-related potentials, neural sensitivity to the difference between monetary reward and loss (the Reward Positivity [RewP]) was assessed at baseline. Negative life events were assessed twice via interview over the ensuing 18 months, yielding an index of total life stress over the follow-up period. A self-report dimensional measure of depression symptoms was administered at baseline and follow-up. After accounting for baseline age, depression, and race, a blunted RewP predicted greater dependent, but not independent, life stress over the follow-up. Mediation analyses revealed a significant indirect effect of the RewP on follow-up depression through dependent, but not independent, life stress. Our results suggest that neural processing reward and loss plays a crucial role in depressogenic stress generation. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
Collapse
Affiliation(s)
| | - Roman Kotov
- Stony Brook University, Department of Psychology
- Stony Brook University, Department of Psychiatry
| | - Greg Perlman
- Stony Brook University, Department of Psychiatry
| | | | | | - Greg Hajcak
- Florida State University, Department of Psychology
| | - Daniel N. Klein
- Stony Brook University, Department of Psychology
- Stony Brook University, Department of Psychiatry
| |
Collapse
|
116
|
van Leeuwen J, Vink M, Joëls M, Kahn R, Hermans E, Vinkers C. Increased responses of the reward circuitry to positive task feedback following acute stress in healthy controls but not in siblings of schizophrenia patients. Neuroimage 2019; 184:547-554. [DOI: 10.1016/j.neuroimage.2018.09.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 09/04/2018] [Accepted: 09/18/2018] [Indexed: 01/07/2023] Open
|
117
|
Ethridge P, Sandre A, Dirks MA, Weinberg A. Past-year relational victimization is associated with a blunted neural response to rewards in emerging adults. Soc Cogn Affect Neurosci 2018; 13:1259-1267. [PMID: 30307568 PMCID: PMC6277819 DOI: 10.1093/scan/nsy091] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 10/01/2018] [Accepted: 10/07/2018] [Indexed: 12/16/2022] Open
Abstract
Anhedonia is associated with multiple forms of psychopathology, yet relatively, little is known about how anhedonia develops. Emerging evidence suggests that anhedonia is the result of interactions between life stress and the brain's reward systems, and that social stress, in particular, may drive these processes. One potent form of social stress is peer victimization, but very little research has focused on peer victimization beyond adolescence, and even less has examined the associations between peer victimization and neural response to rewards. The present study sought to identify associations between past-year history of peer victimization and neural response to rewards in emerging adults (N = 61). Relational and physical forms of victimization were assessed separately since these distinct types of social stress have different trajectories across development and different associations with psychopathology. Reward sensitivity was indexed with the event-related potential component known as the reward positivity, which was elicited using a forced-choice monetary reward guessing task. Results demonstrated that past-year relational, but not physical, victimization was associated with a blunted neural response to rewards. These findings provide insight into one potential mechanism in the etiology of anhedonia, which may, in turn, help us to better identify pathways to multiple psychopathologies.
Collapse
Affiliation(s)
- Paige Ethridge
- Department of Psychology, McGill University, Montreal, QC, Canada
| | - Aislinn Sandre
- Department of Psychology, McGill University, Montreal, QC, Canada
| | - Melanie A Dirks
- Department of Psychology, McGill University, Montreal, QC, Canada
| | - Anna Weinberg
- Department of Psychology, McGill University, Montreal, QC, Canada
| |
Collapse
|
118
|
Fonzo GA. Diminished positive affect and traumatic stress: A biobehavioral review and commentary on trauma affective neuroscience. Neurobiol Stress 2018; 9:214-230. [PMID: 30450386 PMCID: PMC6234277 DOI: 10.1016/j.ynstr.2018.10.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/20/2018] [Accepted: 10/17/2018] [Indexed: 11/28/2022] Open
Abstract
Post-traumatic stress manifests in disturbed affect and emotion, including exaggerated severity and frequency of negative valence emotions, e.g., fear, anxiety, anger, shame, and guilt. However, another core feature of common post-trauma psychopathologies, i.e. post-traumatic stress disorder (PTSD) and major depression, is diminished positive affect, or reduced frequency and intensity of positive emotions and affective states such as happiness, joy, love, interest, and desire/capacity for interpersonal affiliation. There remains a stark imbalance in the degree to which the neuroscience of each affective domain has been probed and characterized in PTSD, with our knowledge of post-trauma diminished positive affect remaining comparatively underdeveloped. This remains a prominent barrier to realizing the clinical breakthroughs likely to be afforded by the increasing availability of neuroscience assessment and intervention tools. In this review and commentary, the author summarizes the modest extant neuroimaging literature that has probed diminished positive affect in PTSD using reward processing behavioral paradigms, first briefly reviewing and outlining the neurocircuitry implicated in reward and positive emotion and its interrelationship with negative emotion and negative valence circuitry. Specific research guidelines are then offered to best and most efficiently develop the knowledge base in this area in a way that is clinically translatable and will exert a positive impact on routine clinical care. The author concludes with the prediction that the development of an integrated, bivalent theoretical and predictive model of how trauma impacts affective neurocircuitry to promote post-trauma psychopathology will ultimately lead to breakthroughs in how trauma treatments are conceptualized mechanistically and developed pragmatically.
Collapse
Affiliation(s)
- Gregory A. Fonzo
- Department of Psychiatry & Behavioral Sciences, Stanford University School of Medicine, Sierra-Pacific Mental Illness Research, Education, and Clinical Center (MIRECC), Veterans Affairs Palo Alto Healthcare System, 401 Quarry Road, MC 5722, Stanford, CA, 94305, USA.
| |
Collapse
|
119
|
Hardee JE, Cope LM, Martz ME, Heitzeg MM. Review of Neurobiological Influences on Externalizing and Internalizing Pathways to Alcohol Use Disorder. Curr Behav Neurosci Rep 2018; 5:249-262. [PMID: 31768306 DOI: 10.1007/s40473-018-0166-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Purpose of review Two developmental courses through which alcohol use disorder (AUD) may emerge include externalizing and internalizing pathways. We review recent neuroimaging studies of potential neural risk factors for AUD and link findings to potential behavioral risk factors for AUD. Recent findings There is evidence that early-emerging weakness in prefrontal functioning and later-emerging differences in reward-system functioning contribute to an externalizing risk pathway. Stress may be an important contributor in the internalizing pathway through a blunting of reward-related activation, which may act alone or in combination with heightened emotion-related reactivity. Summary This review highlights areas for future work, including investigation of the relative balance between prefrontal and subcortical circuitry, attention to stages of AUD, and consideration of environmental factors such as stress and sleep. Particularly important is longitudinal work to understand the temporal ordering of associations among brain maturation, behavioral risk, and alcohol use.
Collapse
Affiliation(s)
- Jillian E Hardee
- University of Michigan, Department of Psychiatry and Addiction Center, 4250 Plymouth Road, Ann Arbor, MI
| | - Lora M Cope
- University of Michigan, Department of Psychiatry and Addiction Center, 4250 Plymouth Road, Ann Arbor, MI
| | - Meghan E Martz
- University of Michigan, Department of Psychiatry and Addiction Center, 4250 Plymouth Road, Ann Arbor, MI
| | - Mary M Heitzeg
- University of Michigan, Department of Psychiatry and Addiction Center, 4250 Plymouth Road, Ann Arbor, MI
| |
Collapse
|