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https://www.readbyqxmd.com/read/28324757/perceptual-category-learning-and-visual-processing-an-exercise-in-computational-cognitive-neuroscience
#1
George Cantwell, Maximilian Riesenhuber, Jessica L Roeder, F Gregory Ashby
The field of computational cognitive neuroscience (CCN) builds and tests neurobiologically detailed computational models that account for both behavioral and neuroscience data. This article leverages a key advantage of CCN-namely, that it should be possible to interface different CCN models in a plug-and-play fashion-to produce a new and biologically detailed model of perceptual category learning. The new model was created from two existing CCN models: the HMAX model of visual object processing and the COVIS model of category learning...
March 6, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28324134/-between-psyche-and-brain-state-of-the-art-in-psychiatry
#2
T Fuchs
Since its development around 1800 psychiatry has been oscillating between the poles of the sciences and the humanities, being directed towards subjective experience on the one hand and towards the neural substrate on the other hand. Today, this dualism seems to have been overcome by a naturalism, which identifies subjective experience with neural processes, according to Griesinger's frequently quoted statement "mental diseases are brain diseases". The progress achieved by the neurobiological paradigm on the level of a fundamental science is in contrast to the tendency to isolate mental illnesses from the patients' social relationships and to neglect subjectivity and intersubjectivity in their explanation...
March 21, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28323920/perinatal-exposure-to-low-dose-bisphenol-a-bpa-disrupts-the-structural-and-functional-development-of-the-hypothalamic-feeding-circuitry
#3
Harry MacKay, Zachary R Patterson, Alfonso Abizaid
Bisphenol-A (BPA) is a component of polycarbonate and other plastics to which humans are regularly exposed at low levels. BPA is characterized as an endocrine disruptor due to observations of its estrogenic activity in various experimental models. We have previously shown evidence of disrupted hypothalamic feeding circuitry and leptin sensitivity in adult BPA-exposed animals subject to a high-fat diet, but because these animals were already exhibiting a diet-induced obese phenotype, we could not rule out the possibility that these observations were simply consequences of the obesity, not a pre-existing phenotype produced by BPA exposure...
February 7, 2017: Endocrinology
https://www.readbyqxmd.com/read/28320179/multimodal-and-simultaneous-assessments-of-brain-and-spinal-fluid-abnormalities-in-chronic-fatigue-syndrome-and-the-effects-of-psychiatric-comorbidity
#4
Benjamin H Natelson, Xiangling Mao, Aaron J Stegner, Gudrun Lange, Diana Vu, Michelle Blate, Guoxin Kang, Eli Soto, Tolga Kapusuz, Dikoma C Shungu
The purpose of this study was to investigate whether CFS patients without comorbid psychiatric diagnoses differ from CFS patients with comorbid psychiatric diagnoses and healthy control subjects in neuropsychological performance, the proportion with elevated spinal fluid protein or white cell counts, cerebral blood flow (CBF), brain ventricular lactate and cortical glutathione (GSH). The results of the study did not show any differences in any of the outcome measures between CFS patients with and without psychiatric comorbidity, thus indicating that psychiatric status may not be an exacerbating factor in CFS...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319837/kalirin-reduction-rescues-psychosis-associated-behavioral-deficits-in-appswe-psen1de9-transgenic-mice
#5
Josh M Krivinko, Susan L Erickson, Eric E Abrahamson, Zachary P Wills, Milos D Ikonomovic, Peter Penzes, Robert A Sweet
Psychosis in Alzheimer's disease (AD+P) represents a distinct clinical and neurobiological AD phenotype and is associated with more rapid cognitive decline, higher rates of abnormal behaviors, and increased caregiver burden compared with AD without psychosis. On a molecular level, AD+P is associated with greater reductions in the protein kalirin, a guanine exchange factor which has also been linked to the psychotic disease, schizophrenia. In this study, we sought to determine the molecular and behavioral consequences of kalirin reduction in APPswe/PSEN1dE9 mice...
February 16, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28318539/a-revival-of-the-homo-loquens-as-a-builder-of-labeled-structures-neurocognitive-considerations
#6
REVIEW
T Goucha, E Zaccarella, A D Friederici
The core capacity of human language is described as the faculty to combine words into hierarchical structures. This review aims to isolate the fundamental computation behind the language faculty together with its neural implementation. First, we present our central hypothesis by confronting recent linguistic theory with evolutionary arguments: linguistic humaniqueness is reflected in the labeling of word combinations forming asymmetric hierarchical structures. Second, we review the neurolinguistic literature, especially focusing on dual-stream connectivity models...
March 16, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28317488/association-between-periodontal-health-status-and-cognitive-abilities-the-role-of-cytokine-profile-and-systemic-inflammation
#7
Marta Sochocka, Maciej Sobczyński, Aleksandra Sender-Janeczek, Katarzyna Zwolińska, Olga Błachowicz, Tomasz Tomczyk, Marek Ziętek, Jerzy Leszek
BACKGROUND: Contemporary neurobiology, periodontal medicine, and immunology are now focusing on the relationship between chronic periodontitis and systemic diseases, that also include Alzheimer's disease (AD). However a causative relationship between dementia and periodontitis has yet to be confirmed. OBJECTIVE: The aim of the study was to determine whether periodontal health status and cognitive abilities are correlated with the relative changes in systemic measures of pro- and anti-inflammatory cytokines as a reflection of systemic inflammation...
March 16, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28317138/impact-of-providing-psychiatry-specialty-pharmacist-intervention-on-reducing-drug-related-problems-among-children-with-autism-spectrum-disorder-related-to-disruptive-behavioural-symptoms-a-prospective-randomized-open-label-study
#8
R Wongpakaran, T Suansanae, T Tan-Khum, C Kraivichian, R Ongarjsakulman, C Suthisisang
WHAT IS KNOWN AND OBJECTIVES: Psychopharmacologic therapy has so far focused on ameliorating disruptive behaviours to improve patient's function and quality of life. Due to the complicated neurobiological aetiology of autism spectrum disorder (ASD), a traditional pharmacist intervention may be insufficient to initiate the optimal care for this vulnerable population. We evaluate the impact of providing specialty psychiatry (PS) pharmacist intervention in identifying and resolving drug-related problems (DRPs) among children with ASD associated with disruptive behaviours...
March 20, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28315981/the-development-of-severe-and-chronic-violence-among-youth-the-role-of-psychopathic-traits-and-reward-processing
#9
Dennis E Reidy, Elizabeth Krusemark, David S Kosson, Megan C Kearns, Joanne Smith-Darden, Kent A Kiehl
Psychopathic traits are a manifestation of a personality pathology that comprises a core affective-interpersonal dysfunction (callous-unemotional traits) and an impulsive-antisocial behavioral component. Of particular importance, psychopathic traits are associated with the perpetration of some of the most severe acts of violence, and they appear to indicate a subset of youth at risk for earlier onset, greater frequency, and persistence of violent offending. Although these youth represent a minority of the population, they commit a significant proportion of the violence in the general community...
March 18, 2017: Child Psychiatry and Human Development
https://www.readbyqxmd.com/read/28315191/non-suicidal-self-injury-in-adolescence
#10
REVIEW
Rebecca C Brown, Paul L Plener
PURPOSE OF REVIEW: Non-suicidal self-injury (NSSI) is a common mental health threat among adolescents. This review aims to present the current literature on epidemiology, etiology, and therapeutic approaches with a focus on the period of adolescence. RECENT FINDINGS: NSSI is widespread among adolescents both in community as well as in clinical settings with lifetime prevalence rates between 17 and 60% in recent studies. It is influenced by multiple factors including social contagion, interpersonal stressors, neurobiological background, as well as emotional dysregulation and adverse experiences in childhood...
March 2017: Current Psychiatry Reports
https://www.readbyqxmd.com/read/28314375/inter-subject-variability-of-axonal-injury-in-diffuse-traumatic-brain-injury
#11
Jeffrey B Ware, Tessa Hart, John Whyte, Amanda Rabinowitz, John A Detre, Junghoon Kim
Traumatic brain injury (TBI) is a leading cause of cognitive morbidity worldwide, for which reliable biomarkers are needed. Diffusion tensor imaging (DTI) is a promising biomarker of traumatic axonal injury (TAI), however existing studies have been limited by a primary reliance upon group-level analytic methods not well-suited to account for inter-subject variability. In this study, 42 adults with TBI of at least moderate severity were examined 3 months following injury and compared to 35 healthy controls. DTI data was used for both traditional group-level comparison as well as subject-specific analysis using the distribution-corrected Z-score (DisCo-Z) approach...
March 17, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28314159/aging-alters-the-molecular-dynamics-of-synapses-in-a-sexually-dimorphic-pattern-in-zebrafish-danio-rerio
#12
Elif Tugce Karoglu, Dilara Ozge Halim, Bahriye Erkaya, Ferda Altaytas, Ayca Arslan-Ergul, Ozlen Konu, Michelle M Adams
The zebrafish has become a popular model for studying normal brain aging due to its large fecundity, conserved genome, and available genetic tools; but little data exists about neurobiological age-related alterations. The current study tested the hypothesis of an association between brain aging and synaptic protein loss across males and females. Western blot analysis of synaptophysin (SYP), a presynaptic vesicle protein, and postsynaptic density-95 (PSD-95) and gephyrin (GEP), excitatory and inhibitory postsynaptic receptor-clustering proteins, respectively, was performed in young, middle-aged, and old male and female zebrafish (Danio rerio) brains...
February 20, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28306543/peripheral-levels-of-bdnf-and-opiate-use-disorder-literature-review-and-update
#13
Raul Felipe Palma-Álvarez, Elena Ros-Cucurull, Kristopher Amaro-Hosey, Laia Rodriguez-Cintas, Lara Grau-López, Margarida Corominas-Roso, Cristina Sánchez-Mora, Carlos Roncero
Several neurobiological factors are related to opiate-use disorder (OUD), and among them, neurotrophins have a relevant role. Brain-derived neurotrophic factor (BDNF) is a central neurotrophin involved in many neuronal processes, and it has been related to several psychiatric diseases and addictive disorders. BDNF can be measured in plasma and serum; its levels may reflect BDNF concentrations in the central nervous system (CNS) and, indirectly, CNS processes. Hence, peripheral BDNF could be a biomarker in clinical practice...
March 17, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28302862/arresting-the-development-of-addiction-the-role-of-%C3%AE-arrestin2-in-drug-abuse
#14
Kirsten A Porter-Stransky, David Weinshenker
The protein β-arrestin2 (βarr2) directly interacts with receptors and signaling pathways that mediate the behavioral effects of drugs of abuse, making it a prime candidate for therapeutic interventions. βarr2 drives desensitization and internalization of G protein-coupled receptors, including dopamine, opioid, and cannabinoid receptors, and can also trigger G protein-independent intracellular signaling. βarr2 mediates several drug-induced behaviors, but the relationship is complex and dependent on the type of behavior (e...
March 16, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28300462/an-update-on-the-advancements-in-the-treatment-of-agitation-in-alzheimer-s-disease
#15
Anton P Porsteinsson, Inga M Antonsdottir
Neuropsychiatric symptoms (NPS) in Alzheimer's disease (AD) are associated with significant negative outcomes for patients and their caregivers. Agitation, one of the most distressing NPS, lacks well-established long term interventions that are both effective and safe. While nonpharmacological interventions are suggested as first-line treatment, they aren't effective in managing symptoms for every patient, resulting in pharmacological interventions for some patients. Traditionally these interventions consist of off-label use of antipsychotics, sedative/hypnotics, anxiolytics, acetylcholinesterase inhibitors, memantine, and antidepressants; where the efficacy doesn't necessarily outweigh the associated risks...
March 16, 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28297929/flexible-dynamics-of-two-quorum-sensing-coupled-repressilators
#16
Edward H Hellen, Evgeny Volkov
Genetic oscillators play important roles in cell life regulation. The regulatory efficiency usually depends strongly on the emergence of stable collective dynamic modes, which requires designing the interactions between genetic networks. We investigate the dynamics of two identical synthetic genetic repressilators coupled by an additional plasmid which implements quorum sensing (QS) in each network thereby supporting global coupling. In a basic genetic ring oscillator network in which three genes inhibit each other in unidirectional manner, QS stimulates the transcriptional activity of chosen genes providing for competition between inhibitory and stimulatory activities localized in those genes...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28294716/cortical-networks-involved-in-memory-for-temporal-order
#17
Anna Manelis, Vencislav Popov, Christopher Paynter, Matthew Walsh, Mark E Wheeler, Keith M Vogt, Lynne M Reder
We examined the neurobiological basis of temporal resetting, an aspect of temporal order memory, using a version of the delayed-match-to-multiple-sample task. While in an fMRI scanner, participants evaluated whether an item was novel or whether it had appeared before or after a reset event that signified the start of a new block of trials. Participants responded "old" to items that were repeated within the current block and "new" to both novel items and items that had last appeared before the reset event (pseudonew items)...
March 15, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28294544/identification-of-acetylcholinesterase-inhibitors-using-homogenous-cell-based-assays-in-quantitative-high-throughput-screening-platforms
#18
Shuaizhang Li, Ruili Huang, Samuel Solomon, Yitong Liu, Bin Zhao, Michael F Santillo, Menghang Xia
Acetylcholinesterase (AChE) is an enzyme responsible for metabolism of acetylcholine, a neurotransmitter associated with muscle movement, cognition, and other neurobiological processes. Inhibition of AChE activity can serve as a therapeutic mechanism, but also cause adverse health effects and neurotoxicity. In order to efficiently identify AChE inhibitors from large compound libraries, homogenous cell-based assays in high-throughput screening platforms are needed. In this study, a fluorescent method using Amplex Red (10-acetyl-3,7-dihydroxyphenoxazine) and the Ellman absorbance method were both developed in a homogenous format using a human neuroblastoma cell line (SH-SY5Y)...
March 14, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28293473/separating-generalized-anxiety-disorder-from-major-depression-using-clinical-hormonal-and-structural-mri-data-a-multimodal-machine-learning-study
#19
Kevin Hilbert, Ulrike Lueken, Markus Muehlhan, Katja Beesdo-Baum
BACKGROUND: Generalized anxiety disorder (GAD) is difficult to recognize and hard to separate from major depression (MD) in clinical settings. Biomarkers might support diagnostic decisions. This study used machine learning on multimodal biobehavioral data from a sample of GAD, MD and healthy subjects to differentiate subjects with a disorder from healthy subjects (case-classification) and to differentiate GAD from MD (disorder-classification). METHODS: Subjects with GAD (n = 19), MD without GAD (n = 14), and healthy comparison subjects (n = 24) were included...
March 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28292691/models-theory-structure-and-mechanisms-in-biochemistry-the-case-of-allosterism
#20
Karina Alleva, José Díez, Lucia Federico
From the perspective of the new mechanistic philosophy, it has been argued that explanatory causal mechanisms in some special sciences such as biochemistry and neurobiology cannot be captured by any useful notion of theory, or at least by any standard notion. The goal of this paper is to show that a model-theoretic notion of theory, and in particular the structuralist notion of a theory-net already applied to other unified explanatory theories, adequately suits the MWC allosteric mechanism explanatory set-up...
March 11, 2017: Studies in History and Philosophy of Biological and Biomedical Sciences
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