The purpose of this study is to use a treatment called repetitive Transcranial Magnetic Stimulation (rTMS) and brain imaging technique called functional magnetic resonance imaging (fMRI) to investigate the causes of depressive symptoms among nicotine dependent cigarette smokers. Participation in this study will involve 3 visits: a screening/training visit and 2 experimental visits. During the screening/training visit, you will provide biological samples to confirm your eligibility to participate and fill out questionnaires, learn the tasks that you will be performing on during the experimental visits, and become familiar with the tools you will be using and environment you will be in during the experimental visits. On each experimental visit, you will undergo fMRI scanning while performing the tasks practiced at training and receive either rTMS or a control rTMS treatment.
The goal of this pilot study is to determine if, in treatment-seeking substance dependent individuals, ten sessions of continuous theta burst transcranial magnetic brain stimulation (cTBS) over a brain region involved in craving (medial prefrontal cortex) can lower an individual's craving and brain response to drug-related cues. This study involves a screening visit, followed by one MRI visit, followed by ten cTBS treatment visits on consecutive days. There will be three follow-up MRI visits: the first will immediately follow completion of a 28-day outpatient treatment program, while the second and third will be one month and two months post-treatment.
Our recently completed study has provided the first evidence that administration of the medication propranolol, following exposure to cocaine cues, can alter drug-associated memories and reduce craving and other drug cue-elicited responses in cocaine addicted persons. The proposed research will use two methods to increase the memory altering effects of propranolol observed in our recently completed study, and document lasting effects not only on craving and cue-elicited reactions, but also on cocaine use. Positive findings will set the stage for a formal clinical trial that could lead to significantly improved treatment outcomes for this treatment-resistant addiction.
Biases in cognitive processing of drug-related stimuli are central to the maintenance of addiction and contribute to poor treatment outcome. This study will evaluate how people who frequently use marijuana respond to marijuana cues, and if a computerized task affects this response. During the two week study period participants will engage in four computer task sessions, and response to marijuana cues will be assessed directly before and after the two-week study period. Two weeks after the last study visit, marijuana cue response and computer task performance will again be assessed. Marijuana use will be tracked throughout the study and follow-up periods.
You may be eligible if you:
Are between the ages of 18 and 65.
Are willing to provide informed consent.
Eligible participants may receive compensation.
Future Direction: The current available treatments for PTSD are not fully effective for cognitive symptoms of PTSD and have high drop-out and poor engagement, two factors found to be most indicative of overall return to functioning for patients with PTSD. Successful completion of this pilot clinical trial may build a platform for future large scale double-blind, placebo-controlled studies using either atomoxetine or psycho-stimulants or other cognitive enhancing medications. The response inhibition related measurements are sensitive to psychotropic medications. Therefore it is advantageous for us to use GNG and Stop Signal approaches to investigate individual treatments response in our future research. We believe GNG and Stop signal approaches together with pharmacogenetic approach will provide valuable information to direct future individualized medicine.
The 'dual burden' of (a) loss of a fellow service member in the context of (b) experiencing repeated extreme life threat is unique to military combat personnel and a core characteristic of combat-related Prolonged Grief Disorder (PGD), a disorder as prevalent as Post-traumatic stress disorder and associated with functional impairment, disability, and suicidality. Effective treatments for depression and PTSD have proven less than adequate in treating PGD when each is offered in isolation; and simply combining these 12-16 week treatment regimens into a 24-36 week treatments is not a viable approach, particularly with a population predisposed to avoiding extended mental health care. The proposed project addresses the need for a Veteran/ military specific treatment of PGD, and uses technology to deliver this treatment in a format that is far more likely to be accepted by military personnel and Veterans. This study will impact clinical practice by providing the first evidence for effective treatment PGD in Veterans.
The main goal of current study is to compare changes in PTSD symptoms following Prolonged Exposure therapy (PE) combined with either a 40 IU dose of intranasal oxytocin or placebo. This will allow us to assess the potential benefits of augmenting PE with oxytocin. Prior to 8 of the 10 weekly therapy sessions (sessions 2-9), subjects will receive oxytocin or placebo.
Bipolar disorders (BD) and substance use disorders (SUD) co-occur very frequently, and co-occurring BD and SUD are associated with devastating public health costs. Unfortunately, there has been very little neurobiological research involving individuals with co-occurring BD and SUD to guide the development of effective treatments for this treatment-resistant population. In response to this clinical need, the proposed study will evaluate a potential mechanistic model of BD and alcohol dependence (AD) co-occurrence, involving shared neurochemical and neurobehavioral dysregulations, that could help to identify novel therapeutic targets for individuals with co-occurring BD and AD.
The objective of the proposed study is to investigate the cortical excitability in combat related PTSD. To accomplish this objective, we will recruit combat veterans with and without PTSD. Clinical assessment will be performed to assess the severity of PTSD and combat exposure. A newly developed transcranial magnetic stimulation approach will be applied to examine the cortical excitability, then genetic analysis will be used to learn how genetic factors influence individual cortical excitability. We expect this innovative approach will enhance our knowledge about the mechnism of PTSD development.
Although sex differences in brain development, structure and function are well known, few studies have explored how these differences contribute to risk and resilience to mental illness. Therefore, biomedical research studies investigating sex differences in brain physiology may lead to more effective intervention and treatment strategies.