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Learning Disorders

Fernando Yepes-Calderon, Marvin D Nelson, J Gordon McComb
The picture archiving and communications system (PACS) is currently the standard platform to manage medical images but lacks analytical capabilities. Staying within PACS, the authors have developed an automatic method to retrieve the medical data and access it at a voxel level, decrypted and uncompressed that allows analytical capabilities while not perturbing the system's daily operation. Additionally, the strategy is secure and vendor independent. Cerebral ventricular volume is important for the diagnosis and treatment of many neurological disorders...
2018: PloS One
Prasanthi Nattala, Pratima Murthy, K S Meena
A major goal of long-term management of substance use disorders is to empower recovering individuals in resisting drug use when confronted with real-world high-risk situations (cues). Since opportunities to reproduce and learn from real-life situations are limited in treatment settings, the key is to bring those real-world drug use cues to the treatment setting through vicarious learning. Cue-exposure approaches achieve this by presenting these cues while the usual drug-use response is prevented. This provides opportunity to practice how to deal with the cues before being discharged from the treatment setting...
February 2018: Indian Journal of Psychiatry
Paulomi M Sudhir
Cognitive behaviour therapy is a structured, time limited, psychological intervention that has is empirically supported across a wide variety of psychological disorders. CBT for addictive behaviours can be traced back to the application of learning theories in understanding addiction and subsequently to social cognitive theories. The focus of CBT is manifold and the focus is on targeting maintaining factors of addictive behaviours and preventing relapse. Relapse prevention programmes are based on social cognitive and cognitive behavioural principles...
February 2018: Indian Journal of Psychiatry
Arun Gupta, Pratima Murthy, Shobini Rao
Chronic use of mind altering substances can lead to a wide variety of neuropsychological deficits, affecting the domains of attention, learning, memory, reasoning. Executive functions such as working memory, cognitive flexibility and inhibitory control may specifically be impaired. These deficits can impact engagement in effective psychosocial interventions. Mild to moderate cognitive dysfunction may not be picked up in routine clinical examination or through commonly used tests like the mini-mental state examination (MMSE)...
February 2018: Indian Journal of Psychiatry
Poornima Kumar, Franziska Goer, Laura Murray, Daniel G Dillon, Miranda L Beltzer, Andrew L Cohen, Nancy H Brooks, Diego A Pizzagalli
Anhedonia (hyposensitivity to rewards) and negative bias (hypersensitivity to punishments) are core features of major depressive disorder (MDD), which could stem from abnormal reinforcement learning. Emerging evidence highlights blunted reward learning and reward prediction error (RPE) signaling in the striatum in MDD, although inconsistencies exist. Preclinical studies have clarified that ventral tegmental area (VTA) neurons encode RPE and habenular neurons encode punishment prediction error (PPE), which are then transmitted to the striatum and cortex to guide goal-directed behavior...
February 26, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
Kelly McGuire, Matthew Siegel
Children with Autism Spectrum Disorder (ASD) are admitted to inpatient psychiatric units at markedly high rates. As health insurance companies and government healthcare systems and regulators seek more evidence for healthcare outcomes, it is important to learn more about the effectiveness of psychiatric inpatient admissions for children with ASD to best inform decisions on provision and access to this level of care. Evidence for models of inpatient treatment for youth with ASD is presented, and key characteristics and consensus recommendations for care are discussed...
March 14, 2018: International Review of Psychiatry
Rebecca J Landa
With advances in the field's ability to identify autism spectrum disorders (ASD) at younger ages, the need for information about the evidence-base for early intervention continues to rise. This review of the ASD early intervention (EI) literature focuses on efficacy studies published within the past 15 years. The neurodevelopmental context for early intervention, timing of initiating intervention, primary intervention approaches, and predictors of treatment outcomes are discussed. The evidence indicates that young children with ASD benefit from EI, and their parents learn to implement child-responsive engagement strategies when a parent-coaching intervention is provided...
March 14, 2018: International Review of Psychiatry
Tzu-Hsiang Lin, Amber Denomme, Rajiv Ranganathan
One of the characteristic features of the human motor system is redundancy-i.e., the ability to achieve a given task outcome using multiple coordination patterns. However, once participants settle on using a specific coordination pattern, the process of learning to use a new alternative coordination pattern to perform the same task is still poorly understood. Here, using two experiments, we examined this process of how participants shift from one coordination pattern to another using different reinforcement schedules...
March 13, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Marie E Gaine, Snehajyoti Chatterjee, Ted Abel
Sleep deprivation disrupts the lives of millions of people every day and has a profound impact on the molecular biology of the brain. These effects begin as changes within a neuron, at the DNA and RNA level, and result in alterations in neuronal plasticity and dysregulation of many cognitive functions including learning and memory. The epigenome plays a critical role in regulating gene expression in the context of memory storage. In this review article, we begin by describing the effects of epigenetic alterations on the regulation of gene expression, focusing on the most common epigenetic mechanisms: (i) DNA methylation; (ii) histone modifications; and (iii) non-coding RNAs...
2018: Frontiers in Neural Circuits
Laura Deckx, Marjan van den Akker, Frank Buntinx, Mieke van Driel
Loneliness is an emerging and important public health concern associated with increased risk for health disorders and even mortality. Interventions targeting coping strategies might be effective in alleviating feelings of loneliness. However, the relationship between loneliness and coping strategies is not well understood. We systematically reviewed quantitative studies addressing the association between loneliness and coping. Studies were included if loneliness and coping styles were measured with a validated scale and the association between both was assessed quantitatively...
March 13, 2018: Psychology, Health & Medicine
Rodrigo Novaes Ferreira, Aline Silva de Miranda, Natalia Pessoa Rocha, Ana Cristina Simoes E Silva, Antonio Lucio Teixeira, Elizabeth Ribeiro da Silva Camargos
BACKGROUND: Parkinson´s Disease (PD) is a chronic, progressive condition, being the second most common neurodegenerative disorder worldwide. The classical features include: bradykinesia, resting tremor, rigidity and festination. These neurological alterations are probably due to the death of dopaminergic neurons in the substantia nigra pars compacta and consequent reduction of dopamine input into the striatum. The decrease of dopamine levels may also be involved in the emergence of non-motor symptoms, including cognitive impairment, anxiety and depression symptoms...
March 12, 2018: Current Medicinal Chemistry
Marta Gómez-Sancho, Jussi Tohka, Vanessa Gómez-Verdejo
Alzheimer's Disease (AD) is a progressive neurological disorder in which the death of brain cells causes memory loss and cognitive decline. The identification of at-risk subjects yet showing no dementia symptoms but who will later convert to AD can be crucial for the effective treatment of AD. For this, Magnetic Resonance Imaging (MRI) is expected to play a crucial role. During recent years, several Machine Learning (ML) approaches to AD-conversion prediction have been proposed using different types of MRI features...
March 9, 2018: Magnetic Resonance Imaging
Miquel A Fullana, Anton Albajes-Eizagirre, Carles Soriano-Mas, Bram Vervliet, Narcís Cardoner, Olívia Benet, Joaquim Radua, Ben J Harrison
The study of fear extinction represents an important example of translational neuroscience in psychiatry and promises to improve the understanding and treatment of anxiety and fear-related disorders. We present the results of a set of meta-analyses of human fear extinction studies in healthy participants, conducted with functional magnetic resonance imaging (fMRI) and reporting whole-brain results. Meta-analyses of fear extinction learning primarily implicate consistent activation of brain regions linked to threat appraisal and experience, including the dorsal anterior cingulate and anterior insular cortices...
March 9, 2018: Neuroscience and Biobehavioral Reviews
Gohar Nikoghosyan-Bossen, Anne Lisbeth Hoffmann
In the absence of any known neurological condition or intellectual impairment, dyspraxia, also known as developmental coordination disorder, should be considered. Dyspraxia is the inability to plan, organize and execute movements. At all ages, dyspraxia can be congenital or acquired. While some learn to cope with their motor difficulties over the years, the majority will retain them as adults. Children with significant functional impairment should be identified and assessed as early as possible, since failure to address the motor and other commonly associated (co-morbid) features may have major consequences in adult life...
March 12, 2018: Ugeskrift for Laeger
Dominic B Dwyer, Carlos Cabral, Lana Kambeitz-Ilankovic, Rachele Sanfelici, Joseph Kambeitz, Vince Calhoun, Peter Falkai, Christos Pantelis, Eva Meisenzahl, Nikolaos Koutsouleris
Identifying distinctive subtypes of schizophrenia could ultimately enhance diagnostic and prognostic accuracy. We aimed to uncover neuroanatomical subtypes of chronic schizophrenia patients to test whether stratification can enhance computer-aided discrimination of patients from control subjects. Unsupervised, data-driven clustering of structural MRI (sMRI) data was used to identify 2 subtypes of schizophrenia patients drawn from a US-based open science repository (n = 71) and we quantified classification improvements compared to controls (n = 74) using supervised machine learning...
February 26, 2018: Schizophrenia Bulletin
Nannan Guo, Marta E Soden, Charlotte Herber, Michael TaeWoo Kim, Antoine Besnard, Paoyan Lin, Xiang Ma, Constance L Cepko, Larry S Zweifel, Amar Sahay
Memories become less precise and generalized over time as memory traces reorganize in hippocampal-cortical networks. Increased time-dependent loss of memory precision is characterized by an overgeneralization of fear in individuals with post-traumatic stress disorder (PTSD) or age-related cognitive impairments. In the hippocampal dentate gyrus (DG), memories are thought to be encoded by so-called 'engram-bearing' dentate granule cells (eDGCs). Here we show, using rodents, that contextual fear conditioning increases connectivity between eDGCs and inhibitory interneurons (INs) in the downstream hippocampal CA3 region...
March 12, 2018: Nature Medicine
D Zoenen, V Delvenne
INTRODUCTION: The processing of information coming from the elementary sensory systems conditions the development and fulfilment of a child's abilities. A dysfunction in the sensory stimuli processing may generate behavioural patterns that might affect a child's learning capacities as well as his relational sphere. The DSM-5 recognizes the sensory abnormalities as part of the symptomatology of Autism Spectrum Disorders. However, similar features are observed in other neurodevelopmental disorders...
2018: Revue Médicale de Bruxelles
Angela M Getz, Pierre Wijdenes, Saba Riaz, Naweed I Syed
All functions of the nervous system are contingent upon the precise organization of neuronal connections that are initially patterned during development, and then continually modified throughout life. Determining the mechanisms that specify the formation and functional modulation of synaptic circuitry are critical to advancing both our fundamental understanding of the nervous system as well as the various neurodevelopmental, neurological, neuropsychiatric, and neurodegenerative disorders that are met in clinical practice when these processes go awry...
March 12, 2018: ACS Chemical Neuroscience
Sherri Rose
OBJECTIVE: To propose nonparametric double robust machine learning in variable importance analyses of medical conditions for health spending. DATA SOURCES: 2011-2012 Truven MarketScan database. STUDY DESIGN: I evaluate how much more, on average, commercially insured enrollees with each of 26 of the most prevalent medical conditions cost per year after controlling for demographics and other medical conditions. This is accomplished within the nonparametric targeted learning framework, which incorporates ensemble machine learning...
March 11, 2018: Health Services Research
Emilia Thorup, Pär Nyström, Gustaf Gredebäck, Sven Bölte, Terje Falck-Ytter
In typical development, infants often alternate their gaze between their interaction partners and interesting stimuli, increasing the probability of joint attention toward surrounding objects and creating opportunities for communication and learning. Children with Autism Spectrum Disorder (ASD) have been found to engage less in behaviors that can initiate joint attention compared to typically developing children, but the role of such atypicalities in the development of ASD during infancy is not fully understood...
March 12, 2018: Journal of Abnormal Child Psychology
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