View clinical trials related to Impulsive Behavior.
Filter by:This study aims to characterize the nature of impulsivity in Parkinson's Disease (PD).
This project studies the impulsive side effects of common treatments for Parkinson's Disease. By learning how parts of the brain involved in Parkinson's encode information related to reward and motivation, the investigators will better understand the reasons why Parkinson's patients often suffer from compulsive gambling, hypersexuality, and repetitive tinkering ("punding"). These results may lead to the design of better methods of deep brain stimulation (DBS) that minimize the behavioral side effects of Parkinson's treatment.
The purpose of this study is to evaluate the effect of brexpiprazole, via functional magnetic resonance imaging (fMRI), on the right ventrolateral prefrontal cortex (VLPFC) activated by impulsive behavior.
This is a study evaluating the relationship between prenatal nutrition and neural development in infants born to mothers with Attention Deficit Hyperactivity Disorder (ADHD). We are hypothesizing that women randomized to a whole food, nutrient-dense diet during their 3rd trimester of pregnancy will have infants with more advanced neural development as compared to infants born to mothers receiving standard-of-care treatment.
Examine the interaction between stimulants, such as cocaine and methylphenidate, and impulsivity.
The aims of this project are to determine if dietary supplementation with NOPE-EGCG (PhosphoLeantm, 30mg NOPE+20mg EGCG per capsule) can: - rescue striatal function, - increase adherence to a diet, - reduce weight-gain after a diet, - improve performance on impulsivity, go/no-go tasks, and negative outcome learning, and - shift fat and sweet preference in overweight/obese human subjects Secondary hypotheses: Baseline brain; perceptual and cognitive measures will be associated with diet, insulin sensitivity and may vary with genotype (TaqA1 1A polymorphism).
The aims of this project are to: 1. Determine if 3-weeks dietary supplementation with NOPE-EGCG (PhosphoLEANtm, 85mg NOPE+50mg EGCG per capsule) versus a placebo will improve performance on impulsivity, go/no-go tasks and negative outcome learning in heavy drinkers. 2. Evaluate whether supplementation with NOPE-EGCG versus placebo results in reductions in alcohol consumption. 3. Preliminary data in the rodent model suggests that rats treated with OEA shift preference for lower fat test stimuli. In aim 3 we will Determine if 3-weeks of supplementation with PhosphoLEAN shifts fat preference towards lower fat test puddings.
In this study the investigators aim to assess whether transcranial direct current stimulation (tDCS; a safe and non-invasive method for modulating the activity of specific brain regions) when applied over the orbitofrontal cortex (OFC) is able to modulate decision-making and impulse control in healthy participants.
This study is dedicated to achieving a better understanding of how the brain processes information. Specifically, the investigators are studying cognitive function, thought process, and impulsivity in people with and without suicidal thoughts. You are being asked to participate in a research study to learn how the use of a medication, risperidone, improves your symptoms of depression. Specifically the investigators are studying the effectiveness of reducing the thought of suicide and other symptoms of severe depression. Risperidone is approved by FDA for the treatment of schizophrenia and bipolar mania, and clinical practice suggests that it might benefit patients with major depressive disorder. During clinical trials with 2607 patients, risperidone was proved to be safe. This is a pilot study to test a new indication of risperidone for treatment of severe depression. The study medication will be given in addition to usual psychiatric care.
There is a series of well designed studies that have reported, in those with a history of anti-social behavior, that supplementation with vitamins / minerals, omega-3 fatty acids (n-3 FA), or both, reduces the incidence of aggressive behavior. Although there is evidence that all these nutrients have a role, to date the relative contribution of fatty acids and vitamins / minerals has not been considered: for example the possibility of a synergistic interaction has not yet been examined. In addition the topic has to date been studied under real-life condition, such as a prison, making the topic difficult to study. The major aim of the present study was to develop a paradigm that would allow the study of the topic in a sample from the general population without a history of anti-social behavior. Subjects received either a vitamin/mineral supplement, a fatty acid supplement, both or neither for three months, Measures of impulsivity and aggression were assessed before and after supplementation. Although in the past measures of actual behaviour have proved to be sensitive to supplementation, questionnaire measures have not. The second major objective was therefore to consider whether such phenomena can be studied in a sample without a history of anti-social behavior, using standardized, sensitive laboratory based measures and to compare these with questionnaire measures. POLYMORPHISMS AND THE RESPONSE TO MICRO-NUTRIENT SUPPLLMENTATION The data set were subsequently used to test an a priori hypothesis not related to the initial hypothesis. A meta-analysis found a consistent pattern that micro-nutrient supplementation improved mood (Long SJ, Benton D. Effects of vitamin and mineral supplementation on stress, mild psychiatric symptoms, and mood in nonclinical samples: a meta-analysis. Psychosom Med 2013; 75: 144-153). To produce evidence of possible mechanisms the extent was determined, to which the impact of micro-nutrient supplementation was influenced by a range of polymorphisms associated with neurotransmitter systems known to modulate mood. The primary outcome measure was the General Health Questionnaire, a 30-item self-report questionnaire that was developed to detect, in a community sample, those who would benefit from seeing a psychiatrist. Given the literature that relates polymorphisms to mood disorders, and the known pharmacology of anti-depressant drugs, a range of polymorphisms were chosen associated with serotonin and catecholamines. Dopamine The SNPs associated with the metabolism and functioning of dopamine were: Dopamine beta hydroxylase (DBH, rs16111115); Dopamine transporter (DAT1, rs2550946); Catechol-O-methyltransferase (COMT, rs4680, rs6269). Dopamine receptor D1 (DRD1, rs4532); Dopamine receptor D2 (DRD2, rs1079598, rs1800497); Dopamine receptor D3 (DRD3, rs6280); Dopamine receptor D4 (DRD4, rs1800955). Serotonin Ten SNPs associated with different aspects of serotonin metabolism were also considered. Rs1843809 is a SNP of the TPH2 gene that encodes Tryptophan hydroxylase. Rs1050565 is a SNP in the BLMH gene that influences the activity of 5HTT (SLC6A4), the serotonin transporter. SNPs associated with various serotonin receptors were also examined: genetic variations of the HTR1A gene (5-HT1A receptor, rs6295); HTR1B gene (5-HT1B receptor, rs6296); HTR2A gene (5-HT2A receptor, rs6311); HTR2B gene (5-HT2B receptor, rs1549339); HTR2C gene (5-hydroxytryptamine receptor 2C, rs518147); HTR3A gene (5-hydroxytryptamine receptor 3A, rs1150226); HTR3B (5-HT3B receptor, rs1672717); HTR4 gene (5-HT4 receptor, rs2278392). Adrenergic mechanisms Finally six SNPs associated with adrenergic receptors were considered: ADRA2A (adrenoceptor alpha 2A, rs553668); ADRB1 (adrenoceptor alpha B1, rs1801253); ADRB2 (adrenoceptor alpha B2, rs1042713; ADRB3 (adrenoceptor alpha B3, rs4994); SLC6AC (noradrenaline transporter, rs5569 and rs2242447). Analysis The data will be analyzed using analysis of variance with a change in GHQ from before to after supplementation as the dependent variable: Micronutrient/placebo X Polymorphism.