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schizophrenia cognition

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https://www.readbyqxmd.com/read/29656549/sodium-nitroprusside-is-effective-in-preventing-and-or-reversing-the-development-of-schizophrenia-related-behaviors-in-an-animal-model-the-shr-strain
#1
Mariana C Diana, Fernanda F Peres, Veronica Justi, Rodrigo A Bressan, Acioly L T Lacerda, José Alexandre Crippa, Jaime E C Hallak, Vanesssa Costhek Abilio
AIMS: The treatment of schizophrenia with antipsychotics is still unsatisfactory. Therefore, the search for new treatments and prevention is crucial, and animal models are fundamental tools for this objective. Preclinical and clinical data evidence the antipsychotic profile of sodium nitroprusside (SNP), a nitric oxide (NO) donor. We aimed to investigate SNP in treating and/or preventing the schizophrenia-related behaviors presented by the spontaneously hypertensive rats (SHR) strain...
April 14, 2018: CNS Neuroscience & Therapeutics
https://www.readbyqxmd.com/read/29652769/schizophrenia-and-criminal-responsibility-a-systematic-review
#2
Georgios Tsimploulis, Gérard Niveau, Ariel Eytan, Panteleimon Giannakopoulos, Othman Sentissi
The significant progress of psychiatry in the 20th century provided a sophisticated theoretical framework to analyze the complex relationships between crime and mental illness. Schizophrenia has been traditionally associated with severe cognitive and affective deficits that heavily influence empathy, judgment capacities, but also control of impulsiveness. Although there is an association between psychotic disorders and absence or decrease of legal responsibility, their relationship is also determined by sociodemographic, developmental, and clinical factors...
May 2018: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/29643358/polygenic-risk-for-schizophrenia-and-measured-domains-of-cognition-in-individuals-with-psychosis-and-controls
#3
Rebecca Shafee, Pranav Nanda, Jaya L Padmanabhan, Neeraj Tandon, Ney Alliey-Rodriguez, Sreeja Kalapurakkel, Daniel J Weiner, Raquel E Gur, Richard S E Keefe, Scot K Hill, Jeffrey R Bishop, Brett A Clementz, Carol A Tamminga, Elliot S Gershon, Godfrey D Pearlson, Matcheri S Keshavan, John A Sweeney, Steven A McCarroll, Elise B Robinson
Psychotic disorders including schizophrenia are commonly accompanied by cognitive deficits. Recent studies have reported negative genetic correlations between schizophrenia and indicators of cognitive ability such as general intelligence and processing speed. Here we compare the effect of polygenetic risk for schizophrenia (PRSSCZ ) on measures that differ in their relationships with psychosis onset: a measure of current cognitive abilities (the Brief Assessment of Cognition in Schizophrenia, BACS) that is greatly reduced in psychotic disorder patients, a measure of premorbid intelligence that is minimally affected by psychosis onset (the Wide-Range Achievement Test, WRAT); and educational attainment (EY), which covaries with both BACS and WRAT...
April 12, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29643356/disc1-regulates-lactate-metabolism-in-astrocytes-implications-for-psychiatric-disorders
#4
Yan Jouroukhin, Yusuke Kageyama, Varvara Misheneva, Alexey Shevelkin, Shaida Andrabi, Emese Prandovszky, Robert H Yolken, Valina L Dawson, Ted M Dawson, Susan Aja, Hiromi Sesaki, Mikhail V Pletnikov
Our knowledge of how genetic risk variants contribute to psychiatric disease is mainly limited to neurons. However, the mechanisms whereby the same genetic risk factors could affect the physiology of glial cells remain poorly understood. We studied the role of a psychiatric genetic risk factor, Disrupted-In-Schizophrenia-1 (DISC1), in metabolic functions of astrocytes. We evaluated the effects of knockdown of mouse endogenous DISC1 (DISC1-KD) and expression of a dominant-negative, C-terminus truncated human DISC1 (DN-DISC1) on the markers of energy metabolism, including glucose uptake and lactate production, in primary astrocytes and in mice with selective expression of DN-DISC1 in astrocytes...
April 12, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29643355/reverse-translated-and-gold-standard-continuous-performance-tests-predict-global-cognitive-performance-in-schizophrenia
#5
Andrew W Bismark, Michael L Thomas, Melissa Tarasenko, Alexandra L Shiluk, Sonia Y Rackelmann, Jared W Young, Gregory A Light
Attentional dysfunction contributes to functional impairments in schizophrenia (SZ). Sustained attention is typically assessed via continuous performance tasks (CPTs), though many CPTs have limited cross-species translational validity and place demands on additional cognitive domains. A reverse-translated 5-Choice Continuous Performance Task (5C-CPT) for human testing-originally developed for use in rodents-was designed to minimize demands on perceptual, visual learning, processing speed, or working memory functions...
April 12, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29643331/electroencephalographic-delta-alpha-frequency-activity-differentiates-psychotic-disorders-a-study-of-schizophrenia-bipolar-disorder-and-methamphetamine-induced-psychotic-disorder
#6
REVIEW
Fleur M Howells, Hendrik S Temmingh, Jennifer H Hsieh, Andrea V van Dijen, David S Baldwin, Dan J Stein
Electroencephalography (EEG) has been proposed as a neurophysiological biomarker to delineate psychotic disorders. It is known that increased delta and decreased alpha, which are apparent in psychosis, are indicative of inappropriate arousal state, which leads to reduced ability to attend to relevant information. On this premise, we investigated delta/alpha frequency activity, as this ratio of frequency activity may serve as an effective neurophysiological biomarker. The current study investigated differences in delta/alpha frequency activity, in schizophrenia (SCZ), bipolar I disorder with psychotic features and methamphetamine-induced psychosis...
April 12, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29628441/the-original-social-network-white-matter-and-social-cognition
#7
REVIEW
Yin Wang, Ingrid R Olson
Social neuroscience has traditionally focused on the functionality of gray matter regions, ignoring the critical role played by axonal fiber pathways in supporting complex social processes. In this paper, we argue that research on white matter is essential for understanding a range of topics in social neuroscience, such as face processing, theory of mind, empathy, and imitation, as well as clinical disorders defined by aberrant social behavior, such as prosopagnosia, autism, and schizophrenia. We provide practical advice on how best to carry out these studies, which ultimately will substantially deepen our understanding of the neurobiological basis of social behavior...
April 5, 2018: Trends in Cognitive Sciences
https://www.readbyqxmd.com/read/29627721/community-based-comprehensive-intervention-for-people-with-schizophrenia-in-guangzhou-china-effects-on-clinical-symptoms-social-functioning-internalized-stigma-and-discrimination
#8
Jie Li, Yuan-Guang Huang, Mao-Sheng Ran, Yu Fan, Wen Chen, Sara Evans-Lacko, Graham Thornicroft
Comprehensive interventions including components of stigma and discrimination reduction in schizophrenia in low- and middle-income countries (LMICs) are lacking. We developed a community-based comprehensive intervention to evaluate its effects on clinical symptoms, social functioning, internalized stigma and discrimination among patients with schizophrenia. A randomized controlled trial including an intervention group (n = 169) and a control group (n = 158) was performed. The intervention group received comprehensive intervention (strategies against stigma and discrimination, psycho-education, social skills training and cognitive behavioral therapy) and the control group received face to face interview...
April 3, 2018: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/29627173/room-to-move-plasticity-in-early-auditory-information-processing-and-auditory-learning-in-schizophrenia-revealed-by-acute-pharmacological-challenge
#9
Neal R Swerdlow, Savita G Bhakta, Gregory A Light
Many patients with chronic psychotic disorders including schizophrenia (SZ) maintain meaningful levels of plasticity (i.e., capacity for change) within neurocognition-relevant brain mechanisms, as evidenced by gains in neurocognition and function after interventions such as targeted cognitive training. However, like many clinical features of these disorders, therapeutic responses in SZ are heterogeneous, and prospectively identifying treatment-sensitive individuals and individualized treatment modalities remains an unmet challenge...
April 4, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29626337/network-neuroscience-a-framework-for-developing-biomarkers-in-psychiatry
#10
David M Lydon-Staley, Danielle S Bassett
Psychiatric disorders are disturbances of cognitive and behavioral processes mediated by the brain. Emerging evidence suggests that accurate biomarkers for psychiatric disorders might benefit from incorporating information regarding multiple brain regions and their interactions with one another, rather than considering local perturbations in brain structure and function alone. Recent advances in the field of applied mathematics generally - and network science specifically - provide a language to capture the complexity of interacting brain regions, and the application of this language to fundamental questions in neuroscience forms the emerging field of network neuroscience...
April 7, 2018: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/29624694/the-impact-of-cognitive-training-on-spontaneous-gamma-oscillations-in-schizophrenia
#11
Petia Popova, Brigitte Rockstroh, Gregory A Miller, Christian Wienbruch, Almut M Carolus, Tzvetan Popov
Schizophrenia patients exhibit less gamma-frequency EEG/MEG activity (>30 Hz), a finding interpreted as evidence of poor temporal neural organization and functional network communication. Research has shown that neuroplasticity-oriented training can improve task-related oscillatory dynamics, indicating some reorganization capacity in schizophrenia. Demonstrating a generalization of such task training effects to spontaneous oscillations at rest would not only enrich understanding of this neuroplastic potential but inform the interpretation of spontaneous gamma oscillations in the service of normal cognitive function...
April 6, 2018: Psychophysiology
https://www.readbyqxmd.com/read/29621261/a-multicenter-randomized-controlled-trial-of-individualized-occupational-therapy-for-patients-with-schizophrenia-in-japan
#12
Takeshi Shimada, Manami Ohori, Yusuke Inagaki, Yuko Shimooka, Naoya Sugimura, Ikuyo Ishihara, Tomotaka Yoshida, Masayoshi Kobayashi
The individualized occupational therapy (IOT) program is a psychosocial program that we developed to facilitate proactive participation in treatment and improve cognitive functioning and other outcomes for inpatients with acute schizophrenia. The program consists of motivational interviewing, self-monitoring, individualized visits, handicraft activities, individualized psychoeducation, and discharge planning. This multicenter, open-labeled, blinded-endpoint, randomized controlled trial evaluated the impact of adding IOT to a group OT (GOT) program as usual for outcomes in recently hospitalized patients with schizophrenia in Japanese psychiatric hospitals setting compared with GOT alone...
2018: PloS One
https://www.readbyqxmd.com/read/29620518/examining-cognition-across-the-bipolar-schizophrenia-diagnostic-spectrum
#13
Amy J Lynham, Leon Hubbard, Katherine E Tansey, Marian L Hamshere, Sophie E Legge, Michael J Owen, Ian R Jones, James T R Walters
BACKGROUND: Cognitive impairments are well-established features of schizophrenia, but there is ongoing debate about the nature and degree of cognitive impairment in patients with schizoaffective disorder and bipolar disorder. We hypothesized that there is a spectrum of increasing impairment from bipolar disorder to schizoaffective disorder bipolar type, to schizoaffective disorder depressive type and schizophrenia. METHODS: We compared performance on the Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) Consensus Cognitive Battery between participants with schizophrenia ( n = 558), schizoaffective disorder depressive type ( n = 112), schizoaffective disorder type ( n = 76), bipolar disorder ( n = 78) and healthy participants ( n = 103) using analysis of covariance with post hoc comparisons...
April 5, 2018: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29619533/the-effects-of-cannabidiol-cbd-on-cognition-and-symptoms-in-outpatients-with-chronic-schizophrenia-a-randomized-placebo-controlled-trial
#14
Douglas L Boggs, Toral Surti, Aarti Gupta, Swapnil Gupta, Mark Niciu, Brian Pittman, Ashley M Schnakenberg Martin, Halle Thurnauer, Andrew Davies, Deepak C D'Souza, Mohini Ranganathan
RATIONALE: Preliminary evidence suggests that cannabidiol (CBD) may be effective in the treatment of neurodegenerative disorders; however, CBD has never been evaluated for the treatment of cognitive impairments associated with schizophrenia (CIAS). OBJECTIVE: This study compared the cognitive, symptomatic, and side effects of CBD versus placebo in a clinical trial. METHODS: This study was a 6-week, randomized, placebo-controlled, parallel group, fixed-dose study of oral CBD (600 mg/day) or placebo augmentation in 36 stable antipsychotic-treated patients diagnosed with chronic schizophrenia...
April 5, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29618332/schizophrenia-alters-intra-network-functional-connectivity-in-the-caudate-for-detecting-speech-under-informational-speech-masking-conditions
#15
Yingjun Zheng, Chao Wu, Juanhua Li, Ruikeng Li, Hongjun Peng, Shenglin She, Yuping Ning, Liang Li
BACKGROUND: Speech recognition under noisy "cocktail-party" environments involves multiple perceptual/cognitive processes, including target detection, selective attention, irrelevant signal inhibition, sensory/working memory, and speech production. Compared to health listeners, people with schizophrenia are more vulnerable to masking stimuli and perform worse in speech recognition under speech-on-speech masking conditions. Although the schizophrenia-related speech-recognition impairment under "cocktail-party" conditions is associated with deficits of various perceptual/cognitive processes, it is crucial to know whether the brain substrates critically underlying speech detection against informational speech masking are impaired in people with schizophrenia...
April 4, 2018: BMC Psychiatry
https://www.readbyqxmd.com/read/29618094/clustering-of-schizotypal-features-in-unaffected-first-degree-relatives-of-schizophrenia-patients
#16
Simon S Y Lui, Karen S Y Hung, Yi Wang, Karen K Y Ho, Hera K H Yeung, Ya Wang, Jia Huang, Diane C Gooding, Eric F C Cheung, Raymond C K Chan
Meehl conceptualized schizotypy as the phenotypic manifestations of a neural integrative defect resulting from a schizophrenia diathesis. The majority of schizotypy studies recruited subjects from the general population and revealed a multidimensional construct. This 2-phase investigation first examined the clustering of schizotypy in 194 unaffected relatives of schizophrenia patients using the Chapman Psychosis Proneness scales and then directly compared the cognitive profiles of negative schizotypal individuals and positive schizotypal individuals with schizophrenia patients and controls...
March 31, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29611297/relations-between-structural-and-eeg-based-graph-metrics-in-healthy-controls-and-schizophrenia-patients
#17
Javier Gomez-Pilar, Rodrigo de Luis-García, Alba Lubeiro, Henar de la Red, Jesús Poza, Pablo Núñez, Roberto Hornero, Vicente Molina
Our aim was to assess structural and functional networks in schizophrenia patients; and the possible prediction of the latter based on the former. The possible dependence of functional network properties on structural alterations has not been analyzed in schizophrenia. We applied averaged path-length (PL), clustering coefficient, and density (D) measurements to data from diffusion magnetic resonance and electroencephalography in 39 schizophrenia patients and 79 controls. Functional data were collected for the global and theta frequency bands during an odd-ball task, prior to stimulus delivery and at the corresponding processing window...
April 2, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29611035/znf804a-variation-may-affect-hippocampal-prefrontal-resting-state-functional-connectivity-in-schizophrenic-and-healthy-individuals
#18
Yuyanan Zhang, Hao Yan, Jinmin Liao, Hao Yu, Sisi Jiang, Qi Liu, Dai Zhang, Weihua Yue
The ZNF804A variant rs1344706 has consistently been associated with schizophrenia and plays a role in hippocampal-prefrontal functional connectivity during working memory. Whether the effect exists in the resting state and in patients with schizophrenia remains unclear. In this study, we investigated the ZNF804A polymorphism at rs1344706 in 92 schizophrenic patients and 99 healthy controls of Han Chinese descent, and used resting-state functional magnetic resonance imaging to explore the functional connectivity in the participants...
April 2, 2018: Neuroscience Bulletin
https://www.readbyqxmd.com/read/29610762/hippocampal-pathophysiology-commonality-shared-by-temporal-lobe-epilepsy-and-psychiatric-disorders
#19
REVIEW
Soichiro Nakahara, Megumi Adachi, Hiroyuki Ito, Mitsuyuki Matsumoto, Katsunori Tajinda, Theo G M van Erp
Accumulating evidence points to the association of epilepsy, particularly, temporal lobe epilepsy (TLE), with psychiatric disorders, such as schizophrenia. Among these illnesses, the hippocampus is considered the regional focal point of the brain, playing an important role in cognition, psychosis, and seizure activity and potentially suggesting common etiologies and pathophysiology of TLE and schizophrenia. In the present review, we overview abnormal network connectivity between the dentate gyrus (DG) and the Cornus Ammonis area 3 (CA3) subregions of the hippocampus relative to the induction of epilepsy and schizophrenia...
2018: Neuroscience Journal
https://www.readbyqxmd.com/read/29609987/associations-of-oxytocin-and-vasopressin-plasma-levels-with-neurocognitive-social-cognitive-and-meta-cognitive-function-in-schizophrenia
#20
Orkun Aydın, Paul H Lysaker, Kuzeymen Balıkçı, Pınar Ünal-Aydın, Ayşen Esen-Danacı
Many with schizophrenia experiences deficits in social cognition, neurocognition and metacognition. Yet the biological mechanisms which may underpin these cognitive deficits are poorly understood. Two candidate causes of these deficits are disturbances in oxytocin (OT) and vasopressin (VP). To explore this we assessed plasma OT and VP in 34 schizophrenia patients and 31 healthy controls. We also concurrently assessed social cognition using the Reading the Mind from the Eyes test, neurocognition using the Wisconsin Card Sorting Test and metacognition using the Metacognitive Assessment Scale-Abbreviated...
March 23, 2018: Psychiatry Research
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