Clinical Research Directory

Tetris Intervention Following Subliminal Reactivation for Intrusive Memories

Intrusive memories of traumatic events are a core feature of Post-Traumatic Stress Disorder (PTSD) and can cause substantial distress and functional impairment. Existing trauma-focused treatments are effective but often require deliberate recollection of traumatic experiences, which can be distressing for some individuals. Previous experimental studies in healthy participants found that masked reactivation of trauma-related cues, followed after a brief interval by a visuospatial interference task using Tetris gameplay, reduced the frequency and emotional intensity of intrusive memories. Building on these findings, the present randomized controlled trial evaluates the efficacy of this intervention in trauma-exposed individuals experiencing three or more intrusive memories per week.

A Digital Cognitive Intervention for Intrusive Memories After Trauma

Intrusive traumatic memories frequently trigger severe distress and psychological disorders such as post-traumatic stress disorder (PTSD). Traditional therapies require explicit trauma recall, which often causes severe patient distress and may lead to treatment avoidance. To address this, our study introduces a less aversive intervention that combines unconscious visual processing with bilateral eye movements to reduce intrusive traumatic memories. Utilizing a randomized, three-arm design, we will compare standardized trauma-related images, patient-provided images, and neutral images, all paired with bilateral eye movements. We plan to recruit participants who have experienced severe trauma and report at least 5 intrusive memories per week, with a target final sample of 40 participants per arm. The primary outcome is the frequency of intrusive memories. Secondary and additional outcomes include PTSD severity, as measured by the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5), the PTSD Checklist for DSM-5 (PCL-5), and the Impact of Event Scale (IES), as well as depression, anxiety, borderline symptoms, functional improvement, subjective intervention distress, and dropout rates.

A Brief Cognitive Task Intervention for NHS Staff Affected by COVID-19 Trauma (GAINS-2 Study)

Frontline healthcare staff are frequently exposed to traumatic events at work (e.g., witnessing patients die), amplified by the COVID-19 pandemic. A significant proportion experience intrusive memories of these events that pop suddenly into mind: they can disrupt functioning and can contribute to post-traumatic stress disorder. Previous research has shown that a brief behavioural intervention can reduce the number of intrusive memories after a traumatic event. In this study we will test the effect of a digital imagery-competing task, a digital music-listening task and treatment as usual (TAU) for National Health Service (NHS) staff with intrusive memories of work-related traumatic events from the pandemic. We test the effect on the number of intrusive memories (primary outcome), and other clinical symptoms (PTSD, anxiety, depression, and insomnia), in addition to work functioning, general functioning and quality of life (secondary outcomes). Intervention feasibility, acceptability and implementation will also be explored (additional outcomes). We will recruit approximately 150 NHS staff (via the Intensive Care Society, social media and direct advertising by NHS Trusts) with intrusive memories of traumatic events experienced during the COVID-19 pandemic. The study is funded by the Wellcome Trust (223016/Z/21/Z).

The Lóa Study: A Brief Digital Intervention for Women With Intrusive Memories in the SAGA Cohort

Intrusive memories are sensory memories of a traumatic event(s) that spring to mind involuntarily, and can evoke strong emotions and disrupt functioning in daily life. Previous research has indicated that a brief cognitive intervention can prevent the development of intrusive memories as well as reduce the number of intrusive memories of long-standing trauma. Initial pilot work (using case studies and a pilot study, ClinicalTrials.gov identifier: NCT05089058) with women in Iceland indicates that the intervention is acceptable and feasible. This randomised controlled trial will compare 3 arms to investigate if access to a cognitive task - either a brief self-guided imagery-competing task or a brief self-guided psychoeducation and signposting task - versus treatment as usual, can reduce the number of intrusive memories in week 5 (i.e., between-groups comparison), controlling for the number of intrusive memories in the baseline week. The effect on the number of intrusive memories in week 5 (primary outcome), and other symptoms of post-traumatic stress, sleep and cognitive functioning will be tested. This study is funded by the Icelandic Research Fund (11709-0270) and (200095-5601) and The Oak Foundation (OCAY-18-442).

Neuromodulation of the Hippocampus to Reduce Intrusive Re-Experiencing in PTSD: A Randomized Controlled Trial

The goal of this clinical trial is to learn if non-invasive neurostimulation of memory-related brain areas works to treat intrusive memory symptoms in adults patients with posttraumatic stress disorder (PTSD). It will also learn about the effect of this neuromodulation procedure on reorganization of memory-related brain networks. The main questions it aims to answer are: Does neuromodulation lower the number of times and the emotional severity participants intrusive memories? Does neuromodulation reduces the overall severity of PTSD? Researchers will compare neuromodulation targeting the hippocampus (a memory-related brain structure) to a control stimulation in an area not related to memory processes to see if hippocampus neuromodulation works to treat intrusive trauma memories and PTSD. Participants will: 1. Undergo magnetic resonance imaging (MRI) scans before and after neuromodulation to: a) determine a personalized neuromodulation target; and b) to measure changes in brain function from before to after treatment. 2. Receive hippocampus neuromodulation or a control neuromodulation once a week for 5 weeks. Keep a daily diary of their symptoms and the number of times they experience intrusive trauma memories.