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https://www.readbyqxmd.com/read/27923717/characterization-of-exploratory-activity-and-learning-ability-of-healthy-and-schizophrenia-like-rats-in-a-square-corridor-system-ambitus
#1
G Horvath, P Liszli, G Kekesi, A Büki, G Benedek
The rodent tasks with food rewards are useful methods to evaluate memory functions, including hole-board and corridor tests. The AMBITUS system (a square corridor with several food rewards), as a combination of these tests, was developed for the investigation of a variety of parameters associated with exploration and cognitive performance in rodents. Experiments were performed to characterize these behaviors in healthy rats and a new "schizophrenia-like" rat substrain with impaired learning ability to reveal the reliability in tests related to these functions...
December 3, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27919546/brain-morphometry-predicts-individual-creative-potential-and-the-ability-to-combine-remote-ideas
#2
David Bendetowicz, Marika Urbanski, Clarisse Aichelburg, Richard Levy, Emmanuelle Volle
For complex mental functions such as creative thinking, inter-individual variability is useful to better understand the underlying cognitive components and brain anatomy. Associative theories propose that creative individuals have flexible semantic associations, which allows remote elements to be formed into new combinations. However, the structural brain variability associated with the ability to combine remote associates has not been explored. To address this question, we performed a voxel-based morphometry (VBM) study and explored the anatomical connectivity of significant regions...
November 15, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27918287/measuring-discrimination-and-reversal-learning-in-mouse-models-within-4-days-and-without-prior-food-deprivation
#3
Esther Remmelink, August B Smit, Matthijs Verhage, Maarten Loos
Many neurological and psychiatric disorders are characterized by deficits in cognitive flexibility. Modeling cognitive flexibility in mice enables the investigation of mechanisms underlying these deficits. The majority of currently available behavioral tests targeting this cognitive domain are reversal learning tasks that require scheduled food restriction, extended training periods and labor-intensive, and stress-inducing animal handling. Here, we describe a novel 4-day (4-d) continuously running task measuring discrimination- and reversal learning in an automated home cage (CognitionWall DL/RL task) that largely eliminates these limitations...
November 2016: Learning & Memory
https://www.readbyqxmd.com/read/27917117/training-on-working-memory-and-inhibitory-control-in-young-adults
#4
Maria J Maraver, M Teresa Bajo, Carlos J Gomez-Ariza
Different types of interventions have focused on trying to improve Executive Functions (EFs) due to their essential role in human cognition and behavior regulation. Although EFs are thought to be diverse, most training studies have targeted cognitive processes related to working memory (WM), and fewer have focused on training other control mechanisms, such as inhibitory control (IC). In the present study, we aimed to investigate the differential impact of training WM and IC as compared with control conditions performing non-executive control activities...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27915588/reversible-cerebral-vasoconstriction-syndrome
#5
Michael Perdices, Geoffrey Herkes
Reversible cerebral vasoconstriction syndrome (RCVS) is a relatively rare, non-progressive angiopathy frequently heralded by severe thunderclap headache. It is characterised by vasoconstriction of cerebral arteries which usually resolves within three months of onset. Transient focal neurological signs may occur, and persistent deficits associated with haemorrhagic comorbidities have been reported in a small percentage of individuals. In this paper we report the case of RH, a 36-year-old woman who presented at a university teaching hospital in Sydney with a clinical history and radiological evidence consistent with RCVS...
December 5, 2016: Neuropsychological Rehabilitation
https://www.readbyqxmd.com/read/27912072/lexical-retrieval-and-semantic-memory-in-parkinson-s-disease-the-question-of-noun-and-verb-dissociation
#6
Henrique Salmazo-Silva, Maria Alice de Mattos Pimenta Parente, Maria Sheila Rocha, Roberta Roque Baradel, André M Cravo, João Ricardo Sato, Fabio Godinho, Maria Teresa Carthery-Goulart
The dissociation between the processing of verbs and nouns has been debated in light of the Embodied Cognition Theory (EC). The objective of this paper is to verify how action and verb processing deficits of PD patients are modulated by different tasks with different cognitive demands. Action and object lexical-semantic processing was evaluated in patients with Parkinson's Disease (PD) and cognitively healthy controls through three different tasks (verbal fluency, naming and semantic association). Compared to controls, PD patients presented worse performance in naming actions and in the two semantic association tasks (action/object)...
November 29, 2016: Brain and Language
https://www.readbyqxmd.com/read/27911474/is-chelation-therapy-efficient-for-the-treatment-of-intravenous-metallic-mercury-intoxication
#7
Daniela Pelclova, Stepanka Vlckova, Ondrej Bezdicek, Manuela Vaneckova, Pavel Urban, Petr Ridzon, Pavel Diblik, Tomas Navratil, Pavlina Klusackova, Kamil Vlcek, Olga Benesova, Pavel Trestik, Jiri Homolka, Sergey Zakharov
The efficacy of treatment for intravenous elemental mercury intoxication has not been fully studied with regard to clinical outcomes, and treatment recommendations vary. We treated a 41-year-old man with a history of drug abuse and depression who attempted suicide using 1 mL (13.53 g) metallic Hg i.v. He was admitted to the hospital two months later for dyspnoea and thoracic pain and was diagnosed with pneumonia. Hg deposits were seen in the lungs and extra-pulmonary organs. His blood level (372 μg/L) exceeded the population level of 5 μg/L by more than 70-fold...
December 2, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27911299/chronotropic-response-and-cognitive-function-in-a-cohort-at-risk-for%C3%A2-alzheimer-s-disease
#8
Lena L Law, Stephanie A Schultz, Elizabeth A Boots, Jean A Einerson, Ryan J Dougherty, Jennifer M Oh, Claudia E Korcarz, Dorothy F Edwards, Rebecca L Koscik, N Maritza Dowling, Catherine L Gallagher, Barbara B Bendlin, Cynthia M Carlsson, Sanjay Asthana, Bruce P Hermann, Mark A Sager, Sterling C Johnson, Dane B Cook, James H Stein, Ozioma C Okonkwo
The objective of this study was to examine the association of chronotropic response (CR) and heart rate (HR) recovery- two indices of cardiovascular function within the context of a graded exercise test- with cognitive performance in a cognitively healthy, late-middle-aged cohort at risk for Alzheimer's disease (AD). Ninety participants (age = 63.52±5.86 years; 65.6% female) from the Wisconsin Registry for Alzheimer's Prevention participated in this study. They underwent graded exercise testing and a comprehensive neuropsychological assessment that assessed the following four cognitive domains: Immediate Memory, Verbal & Learning Memory, Working Memory, and Speed & Flexibility...
December 1, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911004/a-comparison-of-the-neuropsychological-profiles-of-people-living-in-squalor-without-hoarding-to-those-living-in-squalor-associated-with-hoarding
#9
Sook Meng Lee, Matthew Lewis, Deborah Leighton, Ben Harris, Brian Long, Stephen Macfarlane
OBJECTIVE: Squalor affects 1 in 1000 older people and is regarded as a secondary condition to other primary disorders such as dementia, intellectual impairment and alcohol abuse. Squalor frequently is associated with hoarding behaviour. We compared the neuropsychological profile of people living in squalor associated with hoarding to those presenting with squalor only. METHODS: This study is a retrospective case series of hospital inpatient and community healthcare services of 69 people living in squalor (49 from aged care, 16 from aged psychiatry, 3 from acute medical and 1 from a memory clinic)...
December 2, 2016: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/27908591/an-fmri-investigation-of-the-relationship-between-future-imagination-and-cognitive-flexibility
#10
R P Roberts, K Wiebels, R L Sumner, V van Mulukom, C L Grady, D L Schacter, D R Addis
While future imagination is largely considered to be a cognitive process grounded in default mode network activity, studies have shown that future imagination recruits regions in both default mode and frontoparietal control networks. In addition, it has recently been shown that the ability to imagine the future is associated with cognitive flexibility, and that tasks requiring cognitive flexibility result in increased coupling of the default mode network with frontoparietal control and salience networks. In the current study, we investigated the neural correlates underlying the association between cognitive flexibility and future imagination in two ways...
November 28, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27908060/individual-differences-in-the-perception-of-regional-nonnative-and-disordered-speech-varieties
#11
Tessa Bent, Melissa Baese-Berk, Stephanie A Borrie, Megan McKee
Speech perception abilities vary substantially across listeners, particularly in adverse conditions including those stemming from environmental degradation (e.g., noise) or from talker-related challenges (e.g., nonnative or disordered speech). This study examined adult listeners' recognition of words in phrases produced by six talkers representing three speech varieties: a nonnative accent (Spanish-accented English), a regional dialect (Irish English), and a disordered variety (ataxic dysarthria). Semantically anomalous phrases from these talkers were presented in a transcription task and intelligibility scores, percent words correct, were compared across the three speech varieties...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27905058/regularized-latent-class-analysis-with-application-in-cognitive-diagnosis
#12
Yunxiao Chen, Xiaoou Li, Jingchen Liu, Zhiliang Ying
Diagnostic classification models are confirmatory in the sense that the relationship between the latent attributes and responses to items is specified or parameterized. Such models are readily interpretable with each component of the model usually having a practical meaning. However, parameterized diagnostic classification models are sometimes too simple to capture all the data patterns, resulting in significant model lack of fit. In this paper, we attempt to obtain a compromise between interpretability and goodness of fit by regularizing a latent class model...
November 30, 2016: Psychometrika
https://www.readbyqxmd.com/read/27903728/context-dependent-accumulation-of-sensory-evidence-in-the-parietal-cortex-underlies-flexible-task-switching
#13
Hironori Kumano, Yuki Suda, Takanori Uka
: Switching behavior based on multiple rules is a fundamental ability of flexible behavior. Although interactions among the frontal, parietal, and sensory cortices are necessary for such flexibility, little is known about the neural computations concerning context-dependent information readouts. Here, we provide evidence that neurons in the lateral intraparietal area (LIP) accumulate relevant information preferentially depending on context. We trained monkeys to switch between direction and depth discrimination tasks and analyzed the buildup activity in the LIP depending on task context...
November 30, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27901515/neurocognitive-and-clinical-correlates-of-gambling-behavior-based-on-mode-of-gambling
#14
Eric W Leppink, Austin W Blum, Samuel Chamberlain, Jon E Grant
BACKGROUND: Gambling opportunities have expanded greatly in recent years, with ever-increasing availability via the internet as well as land-based options (eg, casinos). Although some research suggests that internet gamblers have higher rates of disordered gambling than land-based only gamblers, the clinical and cognitive importance of these findings is unknown. METHODS: We recruited 542 young adults (age 18 to 29) and compared land- based only (n = 385 [70.8%]) and mixed internet/land-based gamblers (LBGs) (n = 157 [28...
November 2016: Annals of Clinical Psychiatry: Official Journal of the American Academy of Clinical Psychiatrists
https://www.readbyqxmd.com/read/27899165/cognitive-dysfunction-in-body-dysmorphic-disorder-new-implications-for-nosological-systems-and-neurobiological-models
#15
Kiri Jefferies-Sewell, Samuel R Chamberlain, Naomi A Fineberg, Keith R Laws
: Introduction Body dysmorphic disorder (BDD) is a debilitating disorder, characterized by obsessions and compulsions relating specifically to perceived appearance, and which has been newly classified within the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) Obsessive-Compulsive and Related Disorders grouping. Until now, little research has been conducted into the cognitive profile of this disorder. METHODS: Participants with BDD (n=12) and participants without BDD (n=16) were tested using a computerized neurocognitive battery investigating attentional set-shifting (Intra/Extra Dimensional Set Shift Task), decision-making (Cambridge Gamble Task), motor response-inhibition (Stop-Signal Reaction Time Task), and affective processing (Affective Go-No Go Task)...
November 30, 2016: CNS Spectrums
https://www.readbyqxmd.com/read/27898511/cognitive-behavioral-therapy-for-cancer-related-cognitive-dysfunction
#16
Shelly Kucherer, Robert J Ferguson
PURPOSE OF REVIEW: To provide the reader with an overview of the cognitive-behavioral conceptualization of cancer-related cognitive dysfunction (CRCD) and how cognitive behavioral therapy (CBT) can play an important role in treatment. RECENT FINDINGS: Recent findings show that Memory and Attention Adaptation Training (MAAT), a CBT developed to help cancer survivors develop adaptive skills to improve daily cognitive performance and emotional coping, may be an efficacious treatment of CRCD and can be delivered through videoconference technology to improve survivor access to care...
November 24, 2016: Current Opinion in Supportive and Palliative Care
https://www.readbyqxmd.com/read/27897677/cognitive-training-in-the-elderly-bottlenecks-and-new-avenues
#17
Nahid Zokaei, Christopher MacKellar, Giedrė Čepukaitytė, Eva Zita Patai, Anna Christina Nobre
Development of measures to preserve cognitive function or even reverse cognitive decline in the ever-growing elderly population is the focus of many research and commercial efforts. One such measure gaining in popularity is the development of computer-based interventions that "exercise" cognitive functions. Computer-based cognitive training has the potential to be specific and flexible, accommodates feedback, and is highly accessible. As in most budding fields, there are still considerable inconsistencies across methodologies and results, as well as a lack of consensus on a comprehensive assessment protocol...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27896310/preservation-of-essential-odor-guided-behaviors-and-odor-based-reversal-learning-after-targeting-adult-brain-serotonin-synthesis
#18
Kaitlin S Carlson, Meredith S Whitney, Marie A Gadziola, Evan S Deneris, Daniel W Wesson
The neurotransmitter serotonin (5-HT) is considered a powerful modulator of sensory system organization and function in a wide range of animals. The olfactory system is innervated by midbrain 5-HT neurons into both its primary and secondary odor-processing stages. Facilitated by this circuitry, 5-HT and its receptors modulate olfactory system function, including odor information input to the olfactory bulb. It is unknown, however, whether the olfactory system requires 5-HT for even its most basic behavioral functions...
September 2016: ENeuro
https://www.readbyqxmd.com/read/27895562/brain-computation-is-organized-via-power-of-two-based-permutation-logic
#19
Kun Xie, Grace E Fox, Jun Liu, Cheng Lyu, Jason C Lee, Hui Kuang, Stephanie Jacobs, Meng Li, Tianming Liu, Sen Song, Joe Z Tsien
There is considerable scientific interest in understanding how cell assemblies-the long-presumed computational motif-are organized so that the brain can generate intelligent cognition and flexible behavior. The Theory of Connectivity proposes that the origin of intelligence is rooted in a power-of-two-based permutation logic (N = 2 (i) -1), producing specific-to-general cell-assembly architecture capable of generating specific perceptions and memories, as well as generalized knowledge and flexible actions. We show that this power-of-two-based permutation logic is widely used in cortical and subcortical circuits across animal species and is conserved for the processing of a variety of cognitive modalities including appetitive, emotional and social information...
2016: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/27894609/what-is-the-problem-with-medically-unexplained-symptoms-for-gps-a-meta-synthesis-of-qualitative-studies
#20
REVIEW
May-Lill Johansen, Mette Bech Risor
OBJECTIVE: To gain a deeper understanding of challenges faced by GPs when managing patients with MUS. METHODS: We used meta-ethnography to synthesize qualitative studies on GPs' perception and management of MUS. RESULTS: The problem with MUS for GPs is the epistemological incongruence between dominant disease models and the reality of meeting patients suffering from persistent illness. GPs have used flexible approaches to manage the situation, yet patients and doctors have had parallel negative experiences of being stuck, untrustworthy and helpless...
November 21, 2016: Patient Education and Counseling
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