View clinical trials related to Anhedonia.
Filter by:The heterogeneity of depression suggests that several different neurocircuits and pathophysiological mechanisms are involved. Anhedonia - the inability to experience pleasure from, or the lack of motivation to carry out, usually enjoyable activities - is a promising endophenotype within the depression spectrum, with a distinct pathophysiology involving dopaminergic mesolimbic projections. Anhedonia is common in depression and associated with treatment resistance. Pramipexole, an agonist to the dopamine -receptor 3, is an established treatment of Parkinson's disease. Based on its mechanism of action, pramipexole might be efficacious in a subtype of depression characterized by anhedonia and lack of motivation - symptoms linked to dopaminergic hypofunction. This is supported by animal data, clinical experience, and recent pilot study data, but randomized controlled trials (RCTs) are lacking. In this double-blind placebo-controlled RCT the anti-anhedonic and antidepressant effects of add-on pramipexole will be tested, using an "enriched population study design" including only depressed patients with significant anhedonia. To better understand the neurobiology of anhedonia in depression and to identify treatment predictors, simultaneous assessments of anhedonia-related neurocircuitry using (f)MRI will be done, and anhedonia-related biomarkers in blood and cerebrospinal fluid analyzed. The aim of the study is to confirm the efficacy of pramipexole in this depression subtype, which would be an important step towards personalized medicine in psychiatry.
Brain Network Mechanism of Pain Empathy and Anhedonia in Patients With Depression by Group Problem Management Plus Intervention.
The purpose of this study is to compare the effects of Virtual Reality-Reward Training (VR-RT) with an active control condition, Virtual Reality-Memory Training (VR-MT), on positive affect and other clinical symptoms. VR-Reward Training is a novel intervention aimed at enhancing savoring of positive experiences among individuals with depression and low positive affect through guided imaginal recounting following immersion in positive VR experiences. Target enrollment is 80 male and female participants with low positive affect, depression, and impaired functioning, who are at least 18 years old, who will be randomly assigned to 7 weeks of either Virtual Reality-Reward Training (VR-RT) or Virtual Reality-Memory Training (VR-MT). Participants will complete in-person VR sessions, laboratory assessments, self-report questionnaires as part of the study. The total length of participation is around 3 months.
The main purpose of this study is to investigate the effects of ketamine on decision-making and emotion processing in a sample of individuals diagnosed with Major Depressive Disorder (MDD).
The aim of this study is to evaluate the effect of nutraceutical supplement on depressed mood and anhedonia in volunteers after 8 weeks of consumption.
This proposal will examine the effects of estradiol administration on perimenopausal-onset (PO) anhedonia and psychosis symptoms as well as on brain function using simultaneous positron emission tomography and functional magnetic resonance imaging (PET-MR).
The purpose of this study is to investigate whether transcranial direct-current stimulation (tDCS) will engage reward-related brain circuitry, more specifically the uncinate fasciculus (UF) tract, which connects the orbitofrontal cortex (OFC) and nucleus accumbens (NAcc) regions. Also to evaluate whether the changes in the fractional anisotropy (FA) of the UF tract are associated with changes of clinical symptoms of anhedonia and finally to investigate the moderation role of simulated electric fields (EFs) in an association between FA of the UF and symptoms of anhedonia.
The current investigation aims to examine whether a brief, two-session, virtual behavioral activation plus savoring intervention will increase daily positive emotion in university students.
Anhedonia is characterized by loss of interest or pleasure. The proposed pilot study would be the first to test an innovative, neuroscience-informed intervention in mothers reporting depressive symptoms and stress to enhance positive emotionality with the goal of preventing anhedonia and associated emotional disturbances in their children. This study will recruit dyads (mothers and their children) for the intervention.
To evaluate the efficacy of NBI-1065846 compared with placebo on improving symptoms of anhedonia in participants with major depressive disorder (MDD).