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https://www.readbyqxmd.com/read/28421717/cognitive-profiles-in-euthymic-patients-with-bipolar-disorders-results-from-the-face-bd-cohort
#1
Paul Roux, Aurélie Raust, Anne Sophie Cannavo, Valérie Aubin, Bruno Aouizerate, Jean-Michel Azorin, Frank Bellivier, Raoul Belzeaux, Thierry Bougerol, Iréna Cussac, Philippe Courtet, Bruno Etain, Sébastien Gard, Sophie Job, Jean-Pierre Kahn, Marion Leboyer, Emilie Olié, Chantal Henry, Christine Passerieux
OBJECTIVES: Although cognitive deficits are a well-established feature of bipolar disorders (BD), even during periods of euthymia, little is known about cognitive phenotype heterogeneity among patients with BD. METHODS: We investigated neuropsychological performance in 258 euthymic patients with BD recruited via the French network of expert centers for BD. We used a test battery assessing six domains of cognition. Hierarchical cluster analysis of the cross-sectional data was used to determine the optimal number of subgroups and to assign each patient to a specific cognitive cluster...
April 19, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28420238/the-role-of-ti-buffer-layer-thickness-on-the-resistive-switching-properties-of-hafnium-oxide-based-resistive-switching-memories
#2
Sk Ziaur Rahaman, Yu-De Lin, Heng-Yuan Lee, Yu-Sheng Chen, Pang-Shiu Chen, Wei-Su Chen, Chien-Hua Hsu, Kan-Hsueh Tsai, Ming-Jinn Tsai, Pei-Hua Wang
Ti/HfOx ‒based resistive random access memory (RRAM) has been extensively investigated as one of the emerging nonvolatile memory (NVM) candidates due to its excellent memory performance and CMOS process compatibility. Although the importance of the role of the Ti buffer layer is well recognized, the detailed understanding about Ti thickness dependent asymmetric switching nature is still missing. To realize this, the present work addresses the effects of the Ti buffer layer thickness on the switching properties of the TiN/Ti/HfOx/TiN 1T1R RRAM...
April 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28419772/visual-memory-uniquely-predicts-anhedonia-in-schizophrenia-but-not-bipolar-disorder
#3
Anjuli S Bodapati, Lisanne M Jenkins, Rajiv P Sharma, Cherise Rosen
OBJECTIVE: Deficits in memory have been suggested as an influential mechanism of anhedonia, because while pleasant experiences may be enjoyed in-the-moment, the cognitive processes involved in reporting anticipated or remembered enjoyable experiences is thought to be impaired. This study will determine whether any aspects of memory, including visual memory, verbal memory or working memory, are significantly predictive of anhedonia in a sample of schizophrenia, psychotic bipolar disorder and healthy controls...
April 17, 2017: Journal of Neuropsychology
https://www.readbyqxmd.com/read/28406662/explicit-and-implicit-reinforcement-learning-across-the-psychosis-spectrum
#4
Deanna M Barch, Cameron S Carter, James M Gold, Sheri L Johnson, Ann M Kring, Angus W MacDonald, Diego A Pizzagalli, J Daniel Ragland, Steven M Silverstein, Milton E Strauss
Motivational and hedonic impairments are core features of a variety of types of psychopathology. An important aspect of motivational function is reinforcement learning (RL), including implicit (i.e., outside of conscious awareness) and explicit (i.e., including explicit representations about potential reward associations) learning, as well as both positive reinforcement (learning about actions that lead to reward) and punishment (learning to avoid actions that lead to loss). Here we present data from paradigms designed to assess both positive and negative components of both implicit and explicit RL, examine performance on each of these tasks among individuals with schizophrenia, schizoaffective disorder, and bipolar disorder with psychosis, and examine their relative relationships to specific symptom domains transdiagnostically...
April 13, 2017: Journal of Abnormal Psychology
https://www.readbyqxmd.com/read/28392151/effects-of-risk-for-bipolar-disorder-on-brain-function-a-twin-and-family-study
#5
Genichi Sugihara, Fergus Kane, Marco M Picchioni, Christopher A Chaddock, Eugenia Kravariti, Sridevi Kalidindi, Fruhling Rijsdijk, Timothea Toulopoulou, Vivienne A Curtis, Colm McDonald, Robin M Murray, Philip McGuire
Bipolar disorder (BPD) is associated with altered regional brain function during the performance of cognitive tasks. The relative contribution of genetic and environmental risk factors for BPD to these changes has not yet been quantified. We sought to address this issue in a functional neuroimaging study of people who varied in their risk for BPD. Functional magnetic resonance imaging was used to study 124 subjects (29 twin and 9 sibling pairs with at least one member with BPD, and 24 healthy twin pairs) performing a working memory task...
April 6, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28390849/cognitive-burden-of-anticholinergic-medications-in-psychotic-disorders
#6
Seenae Eum, S Kristian Hill, Leah H Rubin, Ryan M Carnahan, James L Reilly, Elena I Ivleva, Sarah K Keedy, Carol A Tamminga, Godfrey D Pearlson, Brett A Clementz, Elliot S Gershon, Matcheri S Keshavan, Richard S E Keefe, John A Sweeney, Jeffrey R Bishop
BACKGROUND: Patients with psychotic disorders are often treated with numerous medications, many of which have anticholinergic activity. We assessed cognition in relation to the cumulative anticholinergic burden of multiple drugs included in treatment regimens of participants from the Bipolar-Schizophrenia Network on Intermediate Phenotypes (B-SNIP) study. METHOD: Clinically stable participants with schizophrenia (n=206), schizoaffective disorder (n=131), and psychotic bipolar disorder (n=146) were examined...
April 5, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28387438/the-cognitive-footprint-of-psychiatric-and-neurological-conditions-cross-sectional-study-in-the-uk-biobank-cohort
#7
B Cullen, D J Smith, I J Deary, J J Evans, J P Pell
OBJECTIVE: We aimed to quantify the prevalence of cognitive impairment in adults with a history of mood disorder, schizophrenia, multiple sclerosis or Parkinson's disease, within a large general population cohort. METHOD: Cross-sectional study using UK Biobank data (n = 502 642). Psychiatric and neurological exposure status was ascertained via self-reported diagnoses, hospital records and questionnaires. Impairment on reasoning, reaction time and memory tests was defined with reference to a single unexposed comparison group...
April 7, 2017: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/28387210/impact-of-cognition-and-clinical-factors-on-functional-outcome-in-patients-with-bipolar-disorder
#8
A Soni, P Singh, R Shah, S Bagotia
OBJECTIVE: To examine the role of different clinical variables and cognition on functional outcome in patients with bipolar disorder. METHODS: A total of 61 euthymic patients with bipolar disorder and 30 healthy individuals were included in the study. The patients were divided into low functioning (n = 30) or high functioning (n = 31) subgroups based on functioning level measured by Global Assessment of Functioning Scale score. Groups were subjected to neurocognitive and clinical assessment...
March 2017: East Asian Archives of Psychiatry: Official Journal of the Hong Kong College of Psychiatrists
https://www.readbyqxmd.com/read/28382899/organizational-learning-strategies-and-verbal-memory-deficits-in-bipolar-disorder
#9
George C Nitzburg, Armando Cuesta-Diaz, Luz H Ospina, Manuela Russo, Megan Shanahan, Mercedes Perez-Rodriguez, Emmett Larsen, Sandra Mulaimovic, Katherine E Burdick
BACKGROUND: Verbal memory (VM) impairment is prominent in bipolar disorder (BD) and is linked to functional outcomes. However, the intricacies of VM impairment have not yet been studied in a large sample of BD patients. Moreover, some have proposed VM deficits that may be mediated by organizational strategies, such as semantic or serial clustering. Thus, the exact nature of VM break-down in BD patients is not well understood, limiting remediation efforts. We investigated the intricacies of VM deficits in BD patients versus healthy controls (HCs) and examined whether verbal learning differences were mediated by use of clustering strategies...
April 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28368180/predictors-of-response-to-cognitive-remediation-in-service-recipients-with-severe-mental-illness
#10
Jean-Pierre Lindenmayer, Veronica Anna Ozog, Anzalee Khan, Isidora Ljuri, Samantha Fregenti, Susan R McGurk
OBJECTIVE: Cognitive challenges are prominent features of individuals diagnosed with schizophrenia, impairing occupational, social, and economic functioning. These challenges are predictive of social and work outcomes. Cognitive remediation has been shown to be effective in improving both cognitive and social functions. However, cognitive remediation does not produce improvement in all participants. We investigated demographic, neurocognitive, and psychopathological predictors associated with improvement following cognitive remediation interventions in service recipients with severe mental illnesses...
March 2017: Psychiatric Rehabilitation Journal
https://www.readbyqxmd.com/read/28335872/cognitive-impairment-in-euthymic-pediatric-bipolar-disorder-a-systematic-review-and-meta-analysis
#11
REVIEW
Liana R Elias, Kamilla W Miskowiak, Antônio M O Vale, Cristiano A Köhler, Hanne L Kjærstad, Brendon Stubbs, Lars V Kessing, Eduard Vieta, Michael Maes, Benjamin I Goldstein, André F Carvalho
OBJECTIVE: To perform a systematic review and meta-analysis of studies investigating neurocognition in euthymic youths with bipolar disorder (BD) compared to healthy controls (HCs). METHOD: A systematic literature search was conducted in the PubMed/MEDLINE, PsycINFO, and EMBASE databases from inception up until March 23, 2016, for original peer-reviewed articles that investigated neurocognition in euthymic youths with BD compared to HCs. Effect sizes (ES) for individual tests were extracted...
April 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28332122/cognitive-impairments-and-predominant-polarity-in-bipolar-disorder-a-cross-sectional-study
#12
Gabriel Okawa Belizario, Alexandre Duarte Gigante, Cristiana Castanho de Almeida Rocca, Beny Lafer
BACKGROUND: Bipolar disorder (BD) patients exhibit cognitive impairments during euthymic states. Studies suggest that manic episodes may be correlated to cognitive impairments. The present study investigated the relationship between predominant polarity and the cognitive deficits frequently detected in bipolar patients. We hypothesize that mania predominant polarity (MPP) patients should exhibit greater cognitive impairments in comparison to depressive (DPP) and indefinite predominant polarity (IPP) patients and healthy control (HC) individuals...
December 2017: International Journal of Bipolar Disorders
https://www.readbyqxmd.com/read/28320224/identification-of-common-neural-circuit-disruptions-in-cognitive-control-across-psychiatric-disorders
#13
Lisa M McTeague, Julia Huemer, David M Carreon, Ying Jiang, Simon B Eickhoff, Amit Etkin
OBJECTIVE: Cognitive deficits are a common feature of psychiatric disorders. The authors investigated the nature of disruptions in neural circuitry underlying cognitive control capacities across psychiatric disorders through a transdiagnostic neuroimaging meta-analysis. METHOD: A PubMed search was conducted for whole-brain functional neuroimaging articles published through June 2015 that compared activation in patients with axis I disorders and matched healthy control participants during cognitive control tasks...
March 21, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28291970/neurodevelopmental-versus-neurodegenerative-model-of-schizophrenia-and-bipolar-disorder-comparison-with-physiological-brain-development-and-aging
#14
Massimiliano Buoli, Marta Serati, Alice Caldiroli, Laura Cremaschi, Alfredo Carlo Altamura
Available data support a contribution of both neurodevelopmental and neurodegenerative factors in the etiology of schizophrenia (SCH) and bipolar disorder (BD). Of note, one of the most important issue of the current psychiatric research is to identify the specific factors that contribute to impaired brain development and neurodegeneration in SCH and BD, and especially how these factors alter normal brain development and physiological aging process. Our hypothesis is that only specific damages, taking place in precise brain development stages, are associated with future SCH /BD onset and that neurodegeneration consists of an acceleration of brain aging after SCH /BD onset...
March 2017: Psychiatria Danubina
https://www.readbyqxmd.com/read/28285254/the-predictive-role-of-daily-cognitive-stimulation-on-executive-functions-in-bipolar-disorder
#15
Charles Cotrena, Laura Damiani Branco, André Ponsoni, Flávio Milman Shansis, Renata Kochhann, Rochele Paz Fonseca
This study aimed to estimate the predictive role of clinical and demographic variables on the three core executive functions (EF) - working memory (WM), inhibitory control (IC) and cognitive flexibility (CF) - in bipolar disorder (BD). The sample consisted of 38 patients with BD type I, 39 with BD type II, and 106 control participants with no mood disorders. Subjects completed the Hayling Test, Trail Making Test, Digit Span Backwards, Sentence Word Span Test, and Stroop Color-Word Test. Composite scores for WM, IC and CF were calculated, and their correlations with clinical and demographic variables were analyzed...
March 7, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28274831/effects-of-prefrontal-bipolar-and-high-definition-transcranial-direct-current-stimulation-on-cortical-reactivity-and-working-memory-in-healthy-adults
#16
Aron T Hill, Nigel C Rogasch, Paul B Fitzgerald, Kate E Hoy
Transcranial direct current stimulation (tDCS) is a well-recognised neuromodulatory technology which has been shown to induce short-lasting changes in motor-cortical excitability. The recent and rapid expansion of tDCS into the cognitive domain, however, necessitates deeper mechanistic understanding of its neurophysiological effects over non-motor brain regions. The present study utilised transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) to probe the immediate and longer-term effects of both a bipolar (BP-tDCS) and more focal 4×1 High-Definition tDCS (HD-tDCS) montage applied over the left DLPFC on TMS-evoked potentials (TEPs) and oscillations in 19 healthy adult participants...
March 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28261713/nonvolatile-reconfigurable-sequential-logic-in-a-hfo2-resistive-random-access-memory-array
#17
Ya-Xiong Zhou, Yi Li, Yu-Ting Su, Zhuo-Rui Wang, Ling-Yi Shih, Ting-Chang Chang, Kuan-Chang Chang, Shi-Bing Long, Simon M Sze, Xiang-Shui Miao
Resistive random access memory (RRAM) based reconfigurable logic provides a temporal programmable dimension to realize Boolean logic functions and is regarded as a promising route to build non-von Neumann computing architecture. In this work, a reconfigurable operation method is proposed to perform nonvolatile sequential logic in a HfO2-based RRAM array. Eight kinds of Boolean logic functions can be implemented within the same hardware fabrics. During the logic computing processes, the RRAM devices in an array are flexibly configured in a bipolar or complementary structure...
March 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/28243220/executive-function-is-selectively-impaired-in-old-age-bipolar-depression
#18
Leonardo Caixeta, Vânia L D Soares, Renata T Vieira, Cândida D Soares, Victor Caixeta, Sandra B Ferreira, Tales A Aversi-Ferreira
Background: Little is known about the cognitive signature of bipolar disorder (BD) in elderly brains. The neuropsychological features of depressive elderly with early-onset BD are largely unknown. This issue is relevant because cognitive impairment can produce an additional impact on the already compromised functionality of elderly with BD. The aim of this study is to assess executive functions (EFs) in the depressive phase of elderly outpatients with early-onset BD. Methods: Forty-nine elderly outpatients with early-onset BD were assessed with several neuropsychological tests for EF in the depressive phase of the disorder...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28241886/comparison-of-associated-features-and-drug-treatment-between-co-occurring-unipolar-and-bipolar-disorders-in-depressed-eating-disorder-patients
#19
Mei-Chih Meg Tseng, Chin-Hao Chang, Shih-Cheng Liao, Hsi-Chung Chen
BACKGROUND: To examine the differences of associated characteristics and prescription drug use between co-occurring unipolar and bipolar disorders in patients with eating disorders (EDs). METHODS: Patients with EDs and major depressive episode (MDE) were recruited from psychiatric outpatient clinics. They were interviewed and completed self-administered measures assessing eating and general psychopathology. The prescribed drugs at the index outpatient visit were recorded...
February 27, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28229954/nano-cone-resistive-memory-for-ultralow-power-operation
#20
Sungjun Kim, Sunghun Jung, Min-Hwi Kim, Tae-Hyeon Kim, Suhyun Bang, Seongjae Cho, Byung-Gook Park
SiN x -based nano-structure resistive memory is fabricated by fully silicon CMOS compatible process integration including particularly designed anisotropic etching for the construction of a nano-cone silicon bottom electrode (BE). Bipolar resistive switching characteristics have significantly reduced switching current and voltage and are demonstrated in a nano-cone BE structure, as compared with those in a flat BE one. We have verified by systematic device simulations that the main cause of reduction in the performance parameters is the high electric field being more effectively concentrated at the tip of the cone-shaped BE...
March 24, 2017: Nanotechnology
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