Abstract：
:Learning and memory impairments are present in schizophrenia (SZ) throughout the illness course and predict psychosocial function. Abnormalities in prefrontal and hippocampal function are thought to contribute to SZ deficits. The radial arm maze (RAM) is a test of spatial learning and memory in rodents that relies on intact prefrontal and hippocampal function. The goal of the present study was to investigate spatial learning in SZ using a virtual RAM. Thirty-three subjects with SZ and thirty-nine healthy controls (HC) performed ten trials of a virtual RAM task. Subjects attempted to learn to retrieve four rewards each located in separate arms. As expected, subjects with SZ used more time and traveled more distance to retrieve rewards, made more reference (RM) and working memory (WM) errors, and retrieved fewer rewards than HC. It is important to note that the SZ group did learn but did not reach the level of HC. Whereas RM errors decreased across trials in the SZ group, WM errors did not. There were no significant relationships between psychiatric symptom severity and maze performance. To our knowledge, use of a virtual 8-arm radial maze task in SZ to assess spatial learning is novel. Impaired virtual RAM performance in SZ is consistent with studies that examined RAM performance in animal models of SZ. Results provide further support for compromised prefrontal and hippocampal function underlying WM and RM deficits in SZ. The virtual RAM task could help bridge preclinical and clinical research for testing novel drug treatments of SZ.
journal_name
Schizophr Resjournal_title
Schizophrenia researchauthors
Spieker EA,Astur RS,West JT,Griego JA,Rowland LMdoi
10.1016/j.schres.2011.11.014subject
Has Abstractpub_date
2012-03-01 00:00:00pages
84-9issue
1-3eissn
0920-9964issn
1573-2509pii
S0920-9964(11)00612-8journal_volume
135pub_type
杂志文章abstract：:Although the seasonal patterns of admissions of affective disorder have been extensively studied, less attention has been given to the seasonal admission patterns of schizophrenia. The traditional method of aggregating the data over a study period, rather than analysing by year of admission may obscure potentially rel...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/s0920-9964(98)00106-6
更新日期：1998-11-30 00:00:00
abstract：BACKGROUND:Noncompliance is common in patients with schizophrenia and can have serious consequences; therefore research of the variables associated with noncompliance is a priority. Although the MEMS device is regarded as the "reference standard" for evaluating compliance, it has been used in very few published studies...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2008.09.007
更新日期：2009-02-01 00:00:00
abstract：:An absent response to the niacin skin test has been reported to occur in about 80% of schizophrenic patients, as compared to 20% of healthy individuals. Niacin provokes redness in skin caused by a capillary vasodilatation mediated by prostaglandins. The metabolism of prostaglandins is regulated by the enzyme phospholi...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/s0920-9964(02)00281-5
更新日期：2003-05-01 00:00:00
abstract：:Vulnerability for schizophrenia is related, in part, to genetic predisposition. The identification of pathophysiological abnormalities associated with the disorder that are also present in unaffected family members of individuals with schizophrenia may assist in delineating the genetic contributions to vulnerability f...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2007.04.026
更新日期：2007-08-01 00:00:00
abstract：:Studies suggest that the affective response is impaired in both schizophrenia and adolescent offspring of schizophrenia patients. Adolescent offspring of patients are developmentally vulnerable to impairments in several domains, including affective responding, yet the bases of these impairments and their relation to n...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2010.07.023
更新日期：2010-11-01 00:00:00
abstract：:Schizophrenia is characterized by increased mortality for which suicidality is the decisive factor. An analysis of cortical thickness and folding to further elucidate neuroanatomical correlates of suicidality in schizophrenia has not yet been performed. We searched for relevant brain regions with such differences betw...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2016.08.010
更新日期：2016-10-01 00:00:00
abstract：:Motivational deficits in patients with schizophrenia adversely affect various domains of daily living. This symptom in everyday life situations manifests in a complex behavioral pattern whose root cannot be simplified to an impaired reward-motivation scheme. This study aimed to identify impairment of the salience netw...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2018.01.019
更新日期：2018-07-01 00:00:00
abstract：:Patients with schizophrenia demonstrate a generalized deficit across multiple cognitive domains. However, it is unknown whether this deficit is largely due to lower intelligence, or if there is an impact of schizophrenia which cannot be accounted for by measures of general intellectual ability (GIA). We created four I...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2013.04.016
更新日期：2013-07-01 00:00:00
abstract：BACKGROUND:In many natural audiovisual events (e.g., the sight of a face articulating the syllable /ba/), the visual signal precedes the sound and thus allows observers to predict the onset and the content of the sound. In healthy adults, the N1 component of the event-related brain potential (ERP), reflecting neural ac...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2013.04.038
更新日期：2013-07-01 00:00:00
abstract：:This study was a preliminary open clinical trial aimed at exploring the hypothesis that estrogen may provide protection against schizophrenia in women. Eleven women with acute psychotic symptoms, as scored on the BPRS, SAPS and SANS, had 0.02 mg estradiol added to neuroleptic treatment for eight weeks. Their response ...
journal_title：Schizophrenia research
pub_type： 临床试验,杂志文章
doi：10.1016/0920-9964(96)82949-5
更新日期：1996-07-05 00:00:00
abstract：:Neuropsychological performance in 20 chronic schizophrenic patients was contrasted to 25 Parkinson's disease, 12 Huntington's disease patients and 26 normal controls on measures shown to be sensitive to subcortical dysfunction. Some overlap was observed in the performance of the schizophrenic and basal ganglia groups ...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/0920-9964(95)00069-0
更新日期：1996-05-01 00:00:00
abstract：:The 24-h profiles of plasma melatonin and cortisol were evaluated in 7 drug-free male paranoid schizophrenics and in 7 healthy subjects matched to the patients for age, sex, body weight, height and season of testing. Blood samples were obtained at 20.00, 22.00, 24.00, 01.00, 02.00, 06.00, 08.00 and 12.00 h. Light was ...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/0920-9964(92)90077-i
更新日期：1992-04-01 00:00:00
abstract：:Our aim was to investigate the association between parental psychosis and potential risk factors for schizophrenia and their interaction. We evaluated whether the factors during pregnancy and birth have a different effect among subjects with and without a history of parental psychosis and whether parental psychosis ma...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2012.12.033
更新日期：2013-04-01 00:00:00
abstract：:We have observed discreet subgroups of male patients with psychotic disorders who have unirhinal olfactory identification deficits (microsmia). The purpose of this study was to examine the relationship between left or right nostril microsmia and performance on literalised neuropsychological tests sensitive to lesions ...
journal_title：Schizophrenia research
pub_type： 杂志文章,多中心研究
doi：10.1016/s0920-9964(01)00227-4
更新日期：2002-08-01 00:00:00
abstract：:Phencyclidine (PCP), ketamine and other N-methyl-D-aspartate (NMDA) antagonists induce schizophrenia-like symptoms in normal volunteers, suggesting that endogenous dysfunction or dysregulation of NMDA receptors may contribute to the pathophysiology of schizophrenia. Glycine and D-cycloserine are potential treatments f...
journal_title：Schizophrenia research
pub_type： 临床试验,杂志文章
doi：10.1016/S0920-9964(03)00129-4
更新日期：2004-02-01 00:00:00
abstract：:Prior studies of mRNA expression, protein expression, and pathway metabolite levels have implicated dysregulation of the kynurenine pathway in the etiology of schizophrenia and bipolar disorder. Here we investigate whether genes involved in kynurenine pathway regulation might interact with genes that respond to kynure...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2009.05.014
更新日期：2009-09-01 00:00:00
abstract：:Speech deficits, notably those involved in psychomotor retardation, blunted affect, alogia and poverty of content of speech, are pronounced in a wide range of serious mental illnesses (e.g., schizophrenia, unipolar depression, bipolar disorders). The present project evaluated the degree to which these deficits manifes...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2014.10.032
更新日期：2014-12-01 00:00:00
abstract：BACKGROUND:Many patients with schizophrenia suffer from metabolic symptoms and weight gain in which predispose them to obesity, diabetes, and cardiovascular problems. This trial examines the efficacy and safety of zonisamide on weight and body mass index in patients with schizophrenia being administered with atypical a...
journal_title：Schizophrenia research
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.schres.2013.03.021
更新日期：2013-06-01 00:00:00
abstract：:Auditory--verbal hallucinations (AVH) are a characteristic feature of schizophrenia. Patients with AVHs have been found to differ from non-hallucinating patients in volumes of certain asymmetrical brain structures on MRI, and on certain neuropsychological measures. There is also evidence of corpus callosum (CC) abnorm...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/s0920-9964(00)00070-0
更新日期：2001-05-30 00:00:00
abstract：BACKGROUND:Accurately diagnosing schizophrenia is still challenging due to the lack of validated biomarkers. Here, we aimed to investigate whether radiomic features in bilateral hippocampal subfields from magnetic resonance images (MRIs) can differentiate patients with schizophrenia from healthy controls (HCs). METHOD...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2020.09.009
更新日期：2020-09-01 00:00:00
abstract：:Valid criteria to identify young people who are believed to be at ultra high risk (UHR) of developing a psychotic episode were developed over the last decade. The first randomized controlled trial of treatment in a UHR cohort indicated that specific pharmacotherapy and psychotherapy delayed onset of disorder, and poss...
journal_title：Schizophrenia research
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.schres.2007.05.018
更新日期：2007-11-01 00:00:00
abstract：:While the long-term administration of antipsychotics is known to cause dopamine supersensitivity psychosis (DSP), recent studies revealed that DSP helps form the foundation of treatment resistance. Electroconvulsive shock (ES) is one of the more effective treatments for treatment-resistant schizophrenia. The objective...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2020.11.062
更新日期：2021-01-08 00:00:00
abstract：:Schizotypy is usually referred to as a "liability" to schizophrenia, but it could also be more generally referred to as nonspecific "psychosis-proneness". This study examined the structure of schizotypy in a normal sample and in a sample of schizophrenics through the administration of the Schizotypal Personality Quest...
journal_title：Schizophrenia research
pub_type：
doi：10.1016/s0920-9964(01)00353-x
更新日期：2002-03-01 00:00:00
abstract：:Two previous studies suggested that childhood cat ownership is a possible risk factor for later developing schizophrenia or other serious mental illness. We therefore used an earlier, large NAMI questionnaire to try and replicate this finding. The results were the same, suggesting that cat ownership in childhood is si...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2015.03.036
更新日期：2015-06-01 00:00:00
abstract：BACKGROUND:The extent of heterogeneity in the long-term course of schizophrenia is unclear. AIMS:To examine the course of schizophrenia in a population-based cohort. METHODS:This study included all Israeli individuals born in 1970-1988, of North African or European origin (N=2290), entered in the National Psychiatric...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2010.10.026
更新日期：2011-03-01 00:00:00
abstract：:Social skill and role functioning were assessed in matched groups of patients with DSM-III-R schizoaffective disorder, bipolar disorder, and schizophrenia. Schizophrenics were categorized as negative syndrome or non-negative on the basis of the SANS. The negative schizophrenics were significantly more impaired on almo...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/0920-9964(89)90032-7
更新日期：1989-07-01 00:00:00
abstract：:There is strong evidence that hippocampal 5-hydroxytryptamine (5-HT) systems are affected in schizophrenia and hence we have studied a number of markers of the 5-HT system in hippocampi from subjects with schizophrenia. Using in situ radioligand binding with autoradiography we measured [(3)H]proplyamino-8-hydroxy-1,2,...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2004.02.007
更新日期：2004-12-01 00:00:00
abstract：:Apolipoprotein D (apoD) is a member of the lipocalin superfamily of transporter proteins that bind small hydrophobic molecules, including arachidonic acid (AA). The ability of apoD to bind AA implicates it in pathways associated with membrane phospholipid signal transduction and metabolism. Recent findings of an incre...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2004.05.007
更新日期：2005-01-01 00:00:00
abstract：:We investigated whether associations between area deprivation, urbanicity and elevated risk of severe mental illnesses (SMIs, including schizophrenia and bipolar disorder) is accounted for by social drift or social causation. We extracted primary and secondary care electronic health records from 2004 to 2015 from a po...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2020.03.044
更新日期：2020-06-01 00:00:00
abstract：:Past studies have demonstrated that the Brief Negative Symptom Scale (BNSS) has excellent psychometric properties in patients with schizophrenia. In the current study, we extended this literature by examining psychometric properties of the BNSS in outpatients diagnosed with bipolar disorder (n=46), outpatients with sc...
journal_title：Schizophrenia research
pub_type： 杂志文章
doi：10.1016/j.schres.2015.12.014
更新日期：2016-02-01 00:00:00
