Faculty Bibliography

BACKGROUND:Post-acute sequelae of SARS-CoV-2 infection (PASC) is characterized by persistent cognitive deficits alongside anxiety and depression symptoms that adversely affect quality of life. Cognitive training (CT) programs and non-invasive neuromodulation, specifically transcranial direct current stimulation (tDCS), have each shown promise for alleviating similar deficits in non-clinical populations. However, their combined efficacy has not yet been evaluated in PASC patients. Therefore, this study aimed to determine whether the combination of CT and tDCS produces benefits for cognitive and mood-related symptoms in individuals with PASC. METHODS:We conducted a double-blind, randomized, sham-controlled clinical trial in adults aged 18-75 with confirmed SARS-CoV-2 infection within the past six months and persisting cognitive complaints. They were randomized to a 4-week in-person intervention of 20 weekday sessions of either active (2 mA anodal-left, cathodal-right prefrontal stimulation) or sham tDCS paired with an app-based CT program. Primary outcomes were six standardized neuropsychological tests assessing verbal memory, working memory, executive functioning, attention, and language, administered at baseline and immediately post-intervention. As secondary outcomes, we assessed changes in depression and anxiety symptoms over the treatment period. RESULTS:Sixty participants (mean age 43.8 ± 13.2 years, 71.7 % women) were randomized to active tDCS + CT or sham tDCS + CT groups, and 52 finished the trial. Compared to sham, tDCS + CT resulted in significantly greater improvement in tests evaluating inhibitory control (effect size [ES] = 0.07, 95 % CI 0 to 0.23, p = 0.046), processing speed (ES = 0.08, 95 % CI 0 to 0.25, p = 0.034), and divided attention (ES = 0.08, 95 % CI 0 to 0.24, p = 0.039), but not in tests evaluating other domains. Both groups improved similarly in depression and anxiety symptoms. Participant's and rater's active guess rates did not differ between groups (ps > 0.20). CONCLUSION/CONCLUSIONS:An intervention with prefrontal targeted tDCS + CT in patients with PASC with cognitive complaints might be effective in improving attention, processing speed and inhibitory control, although further studies are warranted to prospectively confirm these findings. CLINICALTRIALS/RESULTS:GOV: NCT05389592.

INTRODUCTION/BACKGROUND:Cannabis use is rising in the United States. Up to 30 % of individuals who use cannabis develop cannabis use disorder (CUD), for which there are no FDA-approved treatments. This randomized controlled trial (RCT) evaluated the feasibility and efficacy of a novel, one-month telehealth intervention of remotely supervised tDCS (RS-tDCS) paired with mindfulness meditation. This home-based telehealth intervention was evaluated in a cohort of women with multiple sclerosis (MS), a vulnerable subpopulation of adults with high rates of CUD. METHODS:The intervention included 20 home-based RS-tDCS sessions targeting the left DLPFC, delivering 2.0mA for 20minutes, paired with guided mindfulness meditation. Sessions were conducted 5 days per week for four weeks. Fifty-two women with MS and CUD (age: 44 ± 10 years) consented to participate; 47 were randomized 2:1 to active or sham tDCS. Feasibility was assessed via retention and adherence, while preliminary efficacy was measured by cannabis use, withdrawal symptoms, and MS-related symptom scales. RESULTS:Of 47 randomized participants (31 active, 16 sham), 39 (83 %) completed the intervention. The active tDCS group showed significant reductions in weekly cannabis use (Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory, DFAQ-CU: 5.3 ± 2.4 vs. 3.9 ± 2.7 days, p = 0.014) and withdrawal symptoms (CWS: p < 0.001). A trend toward reduced MS-related symptoms was observed (SymptoMScreen: p = 0.031). Cognitive performance improvement at the end of the intervention was significant in the active group (p = 0.011 vs. p = 0.172), supporting functional benefits of reduced cannabis use. CONCLUSIONS:This pilot RCT supports the feasibility and preliminary efficacy of telehealth tDCS in a medical subpopulation. Studying women with MS highlights its potential for large-scale RCTs and clinical use.

More than half of individuals with multiple sclerosis (MS) use cannabis, with up to 20 % at risk of cannabis use disorder (CUD). While some individuals with MS report symptom relief from cannabis use, particularly for pain, sleep, and mood, there is limited support for its evidence-based therapeutic use. In contrast, long-term use has been associated with poorer cognitive and emotional functioning, fatigue, and reduced quality of life. Although reducing or stopping cannabis use has shown benefits, there is a lack of accessible interventions. We recruited nationally for a pilot study of a remotely supervised home-based intervention to reduce cannabis use among women with MS and CUD. The trial response provided critical insights into cannabis use patterns and the significant demand for accessible, effective interventions, highlighting an urgent unmet need within the MS community.

Depression is a common and debilitating disorder affecting millions. First-line treatments fail to achieve remission in about one-third of patients, highlighting a critical treatment need. Transcranial direct current stimulation (tDCS) has emerged as a novel treatment for depression. Therefore, the aim of this review was to provide a comprehensive overview of the last decade of tDCS trials for depression and propose future research directions. To compile studies of the past decade, we conducted a systematic review and meta-analysis of randomized clinical trials (RCTs) of tDCS for depression. A total of 21 RCTs were included, presenting a moderate effect for active tDCS compared to placebo. We also provided a description of study designs, stimulation parameters, and patients' characteristics. Following, we proposed possible strategies to enhance clinical effectiveness and reduce variability in results, including 1) optimization/personalization of tDCS via spatial and temporal target localization; 2) optimized methodological strategies, including home-based, accelerated tDCS protocols and novel trial designs; and 3) investigate patient profile to identify features that can predict treatment response. In conclusion, tDCS holds promise as a treatment for depression, but variability in trial parameters and outcomes underscores the need for its further optimization. Refining and standardizing protocols may enhance its effectiveness.

Fatigue is a common and often debilitating feature of multiple sclerosis (MS) that lacks reliably effective treatment options for most patients. Transcranial direct current stimulation (tDCS), a safe and well-tolerated type of noninvasive brain stimulation, is a low-cost and home-based approach with the potential to reduce fatigue in MS. We conducted a double-blind, sham-controlled, randomized clinical trial to compare active vs. low-dose (sham) tDCS paired with computer-based cognitive training, delivered as a home-based intervention, to reduce MS-related fatigue. Participants with MS-related fatigue, but without depression, were stratified by neurologic disability using the Extended Disability Status Scale (EDSS) and randomized to complete 30 daily sessions over six weeks of either active or sham tDCS paired with online cognitive training (BrainHQ). The primary outcome was the change in PROMIS Fatigue score from baseline to the end of the intervention. A total of 117 participants were randomized, with 92% completing all treatment sessions. Both groups showed significant reductions in fatigue, with no significant difference between them. This suggests that tDCS does not provide any additional benefit over cognitive training alone in reducing fatigue, but confirms the feasibility and tolerance of this home-based intervention.

BACKGROUND/OBJECTIVES/UNASSIGNED:Primary progressive aphasia (PPA) is managed with speech-language therapy (SLT) to slow language decline. Pairing transcranial direct current stimulation (tDCS) with SLT can enhance its effects. However, further research is needed to confirm these findings and guide its clinical use. We evaluated the feasibility of providing an intervention combining tDCS with SLT as a home-based and remotely supervised intervention. METHODS/UNASSIGNED:Participants with confirmed PPA who had word-finding difficulties were recruited for an open-label observational study. The intervention consisted of 20 daily sessions over 1 month, each with 45-min of personalized word retrieval training. During the first 30-min, participants received tDCS over the left inferior frontal gyrus (anode F7, cathode O1) at 2.0 mA. Language measures were remotely administered at baseline and intervention end. RESULTS/UNASSIGNED:= 0.016) from baseline to intervention end. CONCLUSIONS/UNASSIGNED:Our case series demonstrates that home-based tDCS added to SLT is feasible for patients with PPA. However, larger controlled studies are required to confirm its effectiveness in slowing language decline and to fully determine the benefits of this approach. This approach not only facilitates broader access to participation but also enables the extended treatment necessary to evaluate its clinical benefits, moving this treatment closer to clinical availability as a telehealth treatment.

INTRODUCTION/UNASSIGNED:Gait is a critical indicator of neurological health, with changes often signaling underlying decline. We developed a remote gait monitoring protocol using off-the-shelf shoe-based sensors (RunScribe) to assess gait parameters in real-world home settings. This protocol, known as Gait Assessment with Innovative Technologies - Home-based Use and Benefit (GAIT-HUB), was tested in individuals with multiple sclerosis (MS), a population at high risk for gait impairment due to the disease's variable progression. METHODS/UNASSIGNED:Participants with MS completed an in-clinic baseline gait assessment using a validated sensor (G-Sensor®) and three weekly, remotely supervised gait assessments at home using the RunScribe sensors. Gait parameters were compared across devices using intra-class correlation coefficients (ICCs) and Bland-Altman analyses. Longitudinal reliability of remote assessments and system usability score (SUS) were evaluated. RESULTS/UNASSIGNED:Twenty-nine participants (76% women, ages 19-67, PDDS range 0-5) successfully completed the home-based assessments. High agreement between devices was observed for gait speed, stride length, and cadence (ICCs >0.90), though phases like stance and swing showed more variability. Bland-Altman analyses indicated minimal bias in most parameters. Longitudinal assessments demonstrated strong reliability (ICCs >0.87) for key metrics, and SUS indicated good-to-excellent usability of the remote protocol. CONCLUSION/UNASSIGNED:The GAIT-HUB protocol enables reliable and feasible home-based gait monitoring using wearable sensors that patients can easily self-apply. This approach provides valuable insights into daily mobility patterns beyond clinical visits, supporting more precise and timely assessments of functional status between appointments and offering the potential for seamless integration into telemedicine routine care.

BACKGROUND/UNASSIGNED:Cognitive impairment is common in multiple sclerosis (MS). Transcranial direct current stimulation (tDCS) combined with adaptive cognitive training (aCT) may improve clinical outcomes. OBJECTIVE/UNASSIGNED:To evaluate the effect of active vs. sham home-based tDCS + aCT on cognitive function. METHODS/UNASSIGNED:-scores. RESULTS/UNASSIGNED: = .411). CONCLUSIONS/UNASSIGNED:Active vs. sham tDCS + aCT resulted in significantly better cognitive outcomes, with the greatest benefit in those with high neurologic disability.CLINICALTRIALS.GOV; https://clinicaltrials.gov/study/NCT03838770; IDENTIFIER: NCT03838770.

BACKGROUND/UNASSIGNED:Many individuals with progressive multiple sclerosis (PMS) are challenged by reduced manual dexterity and limited rehabilitation options. Transcranial direct current stimulation (tDCS) during motor training can improve rehabilitation outcomes. We developed a protocol for remotely supervising tDCS to deliver sessions of stimulation paired with training at home. OBJECTIVE/UNASSIGNED:This study evaluated the effectiveness of at-home tDCS paired with manual dexterity training for individuals with PMS. METHODS/UNASSIGNED:Sixty-five right-hand dominant participants with PMS and hand impairment were randomized to receive either active or sham M1-SO tDCS paired with manual dexterity training over 4 weeks. Clinical outcomes were measured by the changes in Nine-Hole Peg Test (9-HPT) and Dellon-Modified-Moberg-Pick-Up Test (DMMPUT). RESULTS/UNASSIGNED:= 0.04). CONCLUSION/UNASSIGNED:At-home tDCS paired with manual dexterity training is effective for individuals with PMS, with M1-SO tDCS enhancing training outcomes and offering a promising intervention for improving and preserving hand dexterity.