scholarly journals Single versus dual pathways to functional outcomes in schizophrenia: Role of negative symptoms and cognitive function

2021 ◽  
Vol 23 ◽  
pp. 100191
Author(s):  
Hiroki Okada ◽  
Daisuke Hirano ◽  
Takamichi Taniguchi
Keyword(s):  
Cognitive Function ◽  
Functional Outcomes ◽  
Negative Symptoms ◽  
Single Versus

scholarly journals The Role of the Dopamine D₁ Receptor in the Negative Symptoms of Schizophrenia

2021 ◽  
Author(s):  
◽  
Marie Vanden Broeke
Keyword(s):  
Functional Outcomes ◽  
Negative Symptoms ◽  
Scent Marking ◽  
Negative Contrast ◽  
Social Approach ◽  
Reward Seeking ◽  
Reward Prediction ◽  
The Social ◽  
Core Feature

<p>Diminished motivation is a core feature of schizophrenia that has been linked to impaired functional outcomes. A mechanism thought to contribute to diminished motivation is impaired anticipatory pleasure. Impaired anticipatory pleasure is associated with disrupted reward prediction and reduced engagement in reward-seeking behaviours. To investigate the role of the dopamine D₁ receptor in anticipatory pleasure, D₁ mutant rats and WT rats performed five experiments. Reward prediction was examined using the anticipatory locomotion experiment and successive negative contrast experiment. It was found that D₁ mutant rats have impaired anticipatory responses to expected reward. However, as the WT rats did not show the expected response to an alteration in reward expectation, it was impossible to assess the role of the D₁ receptor. Together, these findings suggest that the D₁ receptor may be involved in aspects of reward prediction. Reward-seeking behaviour was examined using the social approach experiment, scent marking experiment, and the separation induced vocalization experiment. It was found that the D₁ mutant rats have an impaired ability to engage in social and sexual reward-seeking behaviours, but have relatively normal ability to engage in maternal reward-seeking behaviours. Together, these findings indicate that the D₁ receptor is involved in certain aspects of reward-seeking behaviours. In conclusion, there is compelling evidence that a D₁ receptor dysfunction is a likely contributor to diminished motivation in schizophrenia.</p>

scholarly journals The Role of the Dopamine D₁ Receptor in the Negative Symptoms of Schizophrenia

2021 ◽  
Author(s):  
◽  
Marie Vanden Broeke
Keyword(s):  
Functional Outcomes ◽  
Negative Symptoms ◽  
Scent Marking ◽  
Negative Contrast ◽  
Social Approach ◽  
Reward Seeking ◽  
Reward Prediction ◽  
The Social ◽  
Core Feature

<p>Diminished motivation is a core feature of schizophrenia that has been linked to impaired functional outcomes. A mechanism thought to contribute to diminished motivation is impaired anticipatory pleasure. Impaired anticipatory pleasure is associated with disrupted reward prediction and reduced engagement in reward-seeking behaviours. To investigate the role of the dopamine D₁ receptor in anticipatory pleasure, D₁ mutant rats and WT rats performed five experiments. Reward prediction was examined using the anticipatory locomotion experiment and successive negative contrast experiment. It was found that D₁ mutant rats have impaired anticipatory responses to expected reward. However, as the WT rats did not show the expected response to an alteration in reward expectation, it was impossible to assess the role of the D₁ receptor. Together, these findings suggest that the D₁ receptor may be involved in aspects of reward prediction. Reward-seeking behaviour was examined using the social approach experiment, scent marking experiment, and the separation induced vocalization experiment. It was found that the D₁ mutant rats have an impaired ability to engage in social and sexual reward-seeking behaviours, but have relatively normal ability to engage in maternal reward-seeking behaviours. Together, these findings indicate that the D₁ receptor is involved in certain aspects of reward-seeking behaviours. In conclusion, there is compelling evidence that a D₁ receptor dysfunction is a likely contributor to diminished motivation in schizophrenia.</p>

Pathways to functional outcomes in schizophrenia: The role of premorbid functioning, negative symptoms and intelligence

2009 ◽  
Vol 110 (1-3) ◽  
pp. 40-46 ◽  
Author(s):  
N. Brill ◽  
S.Z. Levine ◽  
A. Reichenberg ◽  
G. Lubin ◽  
M. Weiser ◽  
...  
Keyword(s):  
Functional Outcomes ◽  
Negative Symptoms ◽  
Premorbid Functioning

scholarly journals Impact of Negative Symptom Domains and Other Clinical Characteristics on Functional Outcomes in Patients with Schizophrenia

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Hiroki Okada ◽  
Dsisuke Hirano ◽  
Takamichi Taniguchi
Keyword(s):  
Cognitive Function ◽  
Negative Symptom ◽  
Functional Outcomes ◽  
Daily Living ◽  
Negative Symptoms ◽  
Rating Scale ◽  
Additional Contribution ◽  
Self Assessment ◽  
Five Factors ◽  
The Relationship

Negative symptoms of schizophrenia have generally been defined using five factors; however, few studies have examined the relationship between these five factors and functional outcomes. In addition, there is no definitive conclusion regarding the association between negative symptoms and various aspects of functional outcomes (daily living, social, and vocational). This study is aimed at examining the relationship between these five domains of negative symptoms and different functional outcomes. Patients diagnosed with chronic schizophrenia ( n = 100 ) were selected for the evaluation. We used the Brief Negative Symptom Scale to assess negative symptoms, the Brief Psychiatric Rating Scale to assess positive symptoms, the Schizophrenia Cognition Rating Scale to assess cognition, and the Evaluative Beliefs Scale (negative self-assessment) to assess psychological factors. We analyzed their relative impact on Social Functioning Scale domains using hierarchical multiple regression analysis. Concerning the relationship between daily living and negative symptoms, cognitive function showed the highest association with residential outcomes, such as self-care and shopping, while avolition appeared to show an additional contribution; however, for recreational outcomes, avolition showed the main association, whereas cognitive function showed no additional contribution. For social outcomes, asociality and negative self-assessment showed the main associations, while vocational outcomes were determined by both cognitive function and multiple negative symptoms, such as avolition, anhedonia, asociality, and alogia. Since negative symptom domains appear to differentially impact each outcome, specifically daily living outcome, it is important to evaluate the residential outcomes and recreational outcomes separately. Overall, the present study points to the importance of formulating psychosocial treatment strategies specific for each type of preferred outcome in patients with schizophrenia.

Biopsychosocial Patterning of Multimorbidity and Its Consequences

2018 ◽  
pp. 220-236
Author(s):  
Elliot Friedman ◽  
Beth LeBreton ◽  
Lindsay Fuzzell ◽  
Elizabeth Wehrpsann
Keyword(s):  
Quality Of Life ◽  
Older Adults ◽  
Functional Outcomes ◽  
The United States ◽  
Chronic Medical Conditions ◽  
Quality Of Life Research ◽  
Increased Risk ◽  
Over Time

By many estimates the majority of adults over age 65 have two or more chronic medical conditions (multimorbidity) and are consequently at increased risk of adverse functional outcomes. Nonetheless, many older adults with multimorbidity are able to maintain high levels of function and retain good quality of life. Research presented here is designed to understand the influences that help ensure better functional outcomes in these older adults. This chapter presents findings that draw on data from the Midlife in the United States study. The independent and interactive contributions of diverse factors to multimorbidity and changes in multimorbidity over time are reviewed. The degree that multimorbidity increases risk of cognitive impairment and disability is examined. The role of inflammation as a mediator is considered. Multimorbidity is increasingly the norm for older adults, so better understanding of factors contributing to variability in multimorbidity-related outcomes can lead to improved quality of life.

scholarly journals Histamine H1 receptor deletion in cholinergic neurons induces sensorimotor gating ability deficit and social impairments in mice

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Li Cheng ◽  
Cenglin Xu ◽  
Lu Wang ◽  
Dadao An ◽  
Lei Jiang ◽  
...  
Keyword(s):  
Functional Outcomes ◽  
Negative Symptoms ◽  
Cholinergic Neurons ◽  
Sensorimotor Gating ◽  
Social Impairment ◽  
H1 Receptor ◽  
Behavioral Deficits ◽  
Social Impairments ◽  
Cholinergic Projections ◽  
Functional Deficiency

AbstractNegative symptoms in schizophrenia strongly contribute to poor functional outcomes, however its pathogenesis is still unclear. Here, we found that histamine H1 receptor (H1R) expression in basal forebrain (BF) cholinergic neurons was decreased in patients with schizophrenia having negative symptoms. Deletion of H1R gene in cholinergic neurons in mice resulted in functional deficiency of cholinergic projections from the BF to the prefrontal cortex and in the formation of sensorimotor gating deficit, social impairment and anhedonia-like behavior. These behavioral deficits can be rescued by re-expressing H1R or by chemogenetic activation of cholinergic neurons in the BF. Direct chemogenetic inhibition of BF cholinergic neurons produced such behavioral deficits and also increased the susceptibility to hyperlocomotion. Our results suggest that the H1R deficiency in BF cholinergic neurons is critical for sensorimotor gating deficit, social impairments and anhedonia-like behavior. This finding may help to understand the genetic and biochemical bases of negative symptoms in schizophrenia.

Mental well-being interventions in the military: The ten key principles

2021 ◽  
pp. bmjmilitary-2020-001740
Author(s):  
Erin G Lawrence ◽  
N Jones ◽  
N Greenberg ◽  
N T Fear ◽  
S Wessely ◽  
...  
Keyword(s):  
Armed Forces ◽  
Well Being ◽  
The United Kingdom ◽  
Raising Awareness ◽  
Mental Health Interventions ◽  
External Training ◽  
The Military ◽  
Mental Well Being ◽  
Single Versus

Organisations including the United Kingdom Armed Forces should seek to implement mental health interventions to increase the psychological well-being of their workforce. This editorial briefly presents ten key principles that military forces should consider before implementing such interventions. These include job-focused training; evaluating interventions; the use of internal versus external training providers; the role of leaders; unit cohesion, single versus multiple session psychological interventions; not overgeneralising the applicability of interventions; the need for repeated skills practice; raising awareness and the fallibility of screening.

The role of preoperative ultrasound in the diagnosis of penile fractures and the effect of tunica defect length on postoperative functional outcomes

2021 ◽  
Author(s):  
Abdullah Hizir Yavuzsan ◽  
Ahmet Tevfik Albayrak ◽  
Cumhur Yesildal ◽  
Musab Ilgi ◽  
Ibrahim Halil Baloglu ◽  
...  
Keyword(s):  
Functional Outcomes ◽  
Preoperative Ultrasound

scholarly journals Interaction of clozapine with metformin in a schizophrenia rat model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
G. Horvath ◽  
G. Kis ◽  
G. Kekesi ◽  
A. Büki ◽  
L. G. Adlan ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cognitive Function ◽  
Negative Symptoms ◽  
Antipsychotic Drugs ◽  
D1 Receptor ◽  
Antidiabetic Drug ◽  
Beneficial Effects ◽  
Adjuvant Therapies ◽  
Behavioral Parameters ◽  
The Brain

AbstractThe low efficacy of antipsychotic drugs (e.g., clozapine) for negative symptoms and cognitive impairment has led to the introduction of adjuvant therapies. Because previous data suggest the procognitive potential of the antidiabetic drug metformin, this study aimed to assess the effects of chronic clozapine and metformin oral administration (alone and in combination) on locomotor and exploratory activities and cognitive function in a reward-based test in control and a schizophrenia-like animal model (Wisket rats). As impaired dopamine D1 receptor (D1R) function might play a role in the cognitive dysfunctions observed in patients with schizophrenia, the second goal of this study was to determine the brain-region-specific D1R-mediated signaling, ligand binding, and mRNA expression. None of the treatments affected the behavior of the control animals significantly; however, the combination treatment enhanced D1R binding and activation in the cerebral cortex. The Wisket rats exhibited impaired motivation, attention, and cognitive function, as well as a lower level of cortical D1R binding, signaling, and gene expression. Clozapine caused further deterioration of the behavioral parameters, without a significant effect on the D1R system. Metformin blunted the clozapine-induced impairments, and, similarly to that observed in the control animals, increased the functional activity of D1R. This study highlights the beneficial effects of metformin (at the behavioral and cellular levels) in blunting clozapine-induced adverse effects.

Sign in / Sign up

Export Citation Format

Share Document