Clinical Research Directory

Brain Stimulation for Improving Cognition in Chronic Stroke (NEPTUNE)

Few treatments are available for post-stroke rehabilitation. The current study aims to develop a novel, short-term, high-dose repetitive transcranial magnetic stimulation (rTMS) based intervention to improve post-stroke cognitive problems. This study will test the safety as well as changes in cognitive function and brain activation with the administration of an accelerated rTMS protocol in chronic stroke.

Evaluation Of The Relationship Between The Conut Score And Balance And Functional Status In Patients With Chronic Stroke

The primary aim of this study is to evaluate the relationship between the CONUT score, which reflects nutritional status, and balance performance in patients with chronic stroke. The secondary aims are to investigate the association between the CONUT score and functional status and stroke-specific quality of life, as well as to assess the relationships of mid-upper arm circumference, an anthropometric indicator of nutritional status, and ultrasonographic rectus femoris muscle thickness, which reflects muscle mass, with balance performance, functional status, and stroke-specific quality of life. In addition, the study aims to examine the relationships between bone mineral density and balance, functional status, and ambulation level in patients with chronic stroke.

Wireless Nerve Stimulation Device To Enhance Recovery After Stroke

Texas Biomedical Device Center (TxBDC) has developed an innovative strategy to enhance recovery of motor and sensory function after neurological injury termed targeted plasticity therapy (TPT). This technique uses brief pulses of vagus nerve stimulation to engage pro-plasticity neuromodulatory circuits during rehabilitation exercises. Preclinical findings demonstrate that VNS paired with rehabilitative training enhances recovery in multiple models of neurological injury, including stroke, spinal cord injury, intracerebral hemorrhage, and traumatic brain injury. Recovery is associated with neural plasticity in spared motor networks in the brain and spinal cord. Moreover, two initial studies and a recently completed Phase 3 clinical trial using a commercially available device demonstrates that paired VNS with rehabilitation is safe and improves motor recovery after stroke. The purpose of this study is to extend these findings and evaluate whether VNS delivered with the new device paired with rehabilitation represents a safe and feasible strategy to improve recovery of motor and sensory function in participants with stroke.

Comparison of EEG-Timed vs. Repetitive Robot Therapy for Chronic Stroke

This clinical trial compares two types of robotic hand rehabilitation-brain wave (EEG)-timed therapy versus simple repetitive therapy-to see which is more effective for recovering hand function in patients with chronic stroke. Participants will be randomly assigned to either group and will attend sessions using a wearable robotic hand device while wearing an EEG cap. In the EEG-timed group, the robot assists hand movements when participants successfully imagine moving and create specific brain signals, whereas in the repetitive group, the robot moves the hand automatically at set intervals. Both groups will receive a matched dose of robotic training to ensure a fair comparison of how the brain and hand function respond to the therapy.

Effect of Somatosensory Motor Intergration Training on Post-stroke Upper Limb Function.

Background: Most patients suffer from post-stroke somatosensory and motor impairments, and 50% to 70% of patients in the chronic stage still have upper extremity impairments that severely limit their functional independence and quality of life. Somatosensory and motor functions are closely related to each other. Previous evidence showed that somatosensory training or stimulation can modulate motor performance and enhance the efficacy of motor training, and motor training has the potential to promote the reorganization of the somatosensory cortex and enhance somatosensory-motor integration. Therefore, combining somatosensory and motor training may optimize the recovery of upper limb function. However, due to the small number of relevant empirical studies and the low quality of evidence, the effects and neural mechanisms of combined somatosensory and motor training compared with pure somatosensory training or pure motor training are still unknown or uncertain. Purposes: This project will compare the immediate and long-term effects of somatosensory-motor integration training, pure motor training, and pure somatosensory training on the somatosensory and motor functions of patients with chronic stroke, and will investigate the neural mechanisms of somatosensory-motor recovery using neuroimaging and neurophysiological techniques. Research methods: A single-blind (assessor-blinded) randomized controlled trial design will be used in this three-year project. A sample of 153 patients with chronic stroke will be recruited, and subjects who meet the selection criteria will undergo a baseline assessment and then be randomly assigned in stratified blocks to either the somatosensory-motor integration training group, pure somatosensory training group or pure motor training group. Subjects will receive three to five 60-minute sessions per week for a total of 15 sessions, followed by post-intervention (immediate effect) and three-month follow-up (long-term effect) assessments. Outcome measures will include neuroimaging (functional near-infrared spectroscopy.), and clinical scales (somatosensory function, motor function, upper extremity function, real life functional upper extremity performance., daily activities, and quality of life). The data will be analyzed using intention-to-treat analysis. The treatment effects within each group will be determined by paired t tests. The difference in effects among the three groups will be analyzed by analyses of covariate. Multiple linear regressions will also be used to explore the factors affecting the recovery of somatosensory and motor functions. Expected results and contributions: The researchers expect that somatosensory-motor integration training, pure somatosensory training and pure motor training can all effectively improve the somatosensory and motor functions of patients with stroke. Among the three groups, somatosensory-motor integration training will show the greatest improvement in upper extremity function. The results of this project will provide empirical evidence on the effects and neural mechanisms of somatosensory-motor integration training, which will help clinicians select appropriate treatment strategies, facilitate clinical reasoning, and predict the recovery potential of somatosensory-motor function based on patient characteristics.

Personalized Transcranial Direct Current Stimulation in Stroke Recovery

The central objective of this application is to explore the neural substrate of personalized tDCS (ptDCS) and to determine whether the paradigm for each stroke patient can predict the amount of sustained clinical improvement through increased connectivity as measured by a biomarker of plasticity.

Exergame-Based Upper-Limb Rehabilitation in Adults With Chronic Stroke

This study is a randomized controlled trial designed to evaluate the effectiveness of a semi-autonomous upper-limb rehabilitation program based on exergames in adults with chronic stroke. Participants will be randomly assigned (1:1) to either an exergame-based intervention or an individually delivered conventional home-based therapy program. The primary outcome is upper-limb functionality as measured by the Action Research Arm Test (ARAT). Secondary outcomes include upper-limb motor function and quality of life. The study also examines adherence, usability, and the feasibility of remote monitoring for long-term implementation.

Psychedelic Healing: Adjunct Therapy Harnessing Opened Malleability

The main purpose of the current studies is to evaluate the safety and tolerability of psilocybin in patients with chronic stroke.

Constraint Induced Movement Therapy and Bilateral Training in Chronic Stroke

Stroke is a leading cause of long-term disability, with upper limb spasticity and impaired hand function being common problems in the chronic phase. These impairments significantly affect independence in activities of daily living and overall quality of life. Constraint-Induced Movement Therapy (CIMT) and Bilateral Training (BT) are two widely used neurorehabilitation approaches aimed at improving upper limb motor recovery after stroke; however, evidence comparing their effectiveness on wrist spasticity and hand function in chronic stroke patients remains limited. This single-blinded randomized controlled trial aims to compare the effects of Constraint-Induced Movement Therapy combined with Functional Electrical Stimulation (FES) versus Bilateral Training combined with Functional Electrical Stimulation on wrist spasticity and hand function in patients with chronic stroke. A total of 94 participants diagnosed with chronic stroke will be randomly allocated into two groups. Group A will receive CIMT with FES, while Group B will receive Bilateral Training with FES. Both interventions will be administered three times per week for eight weeks. Outcome measures will include wrist spasticity assessed using the Modified Ashworth Scale (MAS) and upper limb motor function assessed using the Fugl-Meyer Assessment for Upper Extremity (FMA-UE) and the Chedoke Arm and Hand Activity Inventory (CAHAI). Assessments will be conducted at baseline and after completion of the intervention period. The findings of this study are expected to provide evidence on the comparative effectiveness of CIMT and Bilateral Training in improving wrist spasticity and hand function, thereby assisting clinicians in selecting optimal rehabilitation strategies for chronic stroke patients.

Safety and Efficacy of Hip Assist Powered Exoskeleton for Gait Training in Patients With Late Subacute and Chronic Stroke

The aim of this study is to evaluate the safety of gait training using a hip-assist powered exoskeleton. This will be assessed by collecting all device-related adverse events occurring during the entire intervention period, which consists of a total of 10 sessions within 5 weeks across two different gait rehabilitation protocols.

Reflex Excitability in Post-stroke Stiff-Knee Gait

The purpose of this study is to examine the reflex excitability of the rectus femoris in individuals with and without post-stroke Stiff-Knee gait. We use electrical stimulation of the peripheral nerve innervating the rectus femoris for a well-controlled reflex stimulus. We are investigating whether reflex excitability of the rectus femoris correlates with gait kinematics.

Transcutaneous Vagus Nerve Stimulation in Aphasia After Stroke

Aphasia is an acquired language disorder. Stroke is the most common cause of aphasia, which affects 30% of stroke survivors. Speech and Language Therapy (SLT) can help people with aphasia but it may not be provided at the required intensity. Access to therapy is often limited after the first few months following stroke. People with aphasia can improve with therapy many years after stroke but these benefits have not been found to translate to day to day conversation. Transcutaneous Vagus Nerve Stimulation (tVNS) is a non-invasive technique which involves stimulating a branch of the vagus nerve through the skin of the ear, using a small earpiece. This technique is safe and has been approved for use in headache. There is promising evidence that tVNS can improve motor rehabilitation in chronic stroke. This technique may be helpful in aiding language recovery in individuals with chronic aphasia. The current pilot study will primarily assess the feasibility, safety and tolerability of self-directed tVNS paired with computer-based SLT, in individuals with chronic stroke-related aphasia. Secondly, the study aims to explore the effect of the intervention on word-finding ability and to explore potential mechanisms of action. Participants will be randomly allocated to an active or sham tVNS group. Participants will be asked to use the stimulation device at home for 6 weeks, whilst completing computer-based SLT. To date, there are no published studies exploring the use of tVNS in aphasia. An indication of study feasibility may support the development of a larger RCT to explore treatment efficacy.

intenSive UpPer Extremity Recovery Program for Chronic Stroke (SUPER)

The purpose of this study is to Investigate the feasibility of a high-quality, high-dose, high-intensity upper extremity therapy program and to assess the treatment effects of a high-quality, high-dose, high-intensity upper extremity therapy program on functional outcomes, motor impairment, and quality of life

Feasibility and Efficacy of PRO-MAMAS

This experimental design will assess the feasibility \& initial effectiveness of PRO-MAMAS (promoting participation, health and wellbeing through meaningful maternal-role activities after stroke and other chronic conditions) - a novel occupational therapy intervention program to promote participation, health and wellbeing of older mothers with chronic stroke. Assessments will be conducted at three time points: baseline, pre, post the Pro-MAMA intervention

Home-based FES Training in People With Chronic Stroke

This project will examine the feasibility, safety and effect of home-based functional electrical stimulation (FES) applied to different lower limb muscles in combination with task-specific training on gait, balance and mobility in adults with chronic stroke. 30 individuals with chronic stroke will first undergo initial screening and baseline walking, mobility, balance and strength assessments in the laboratory. After determining their eligibility for the study, they will undergo 12-weeks of home-based FES and task-specific training. Following the initial screening (week 1) and pre-intervention assessment (week 2), participants will be trained in the lab for 6 sessions (week 3-4) for a FES home program and then given a FES home kit (FES device and an android tablet). Participants will then undergo home-training for 2 weeks (week 5-6) followed by mid-training assessment (week 7). Again, participants will undergo 4-weeks of home training (week 8-11) and final assessment at the end of training (week 12). This project has the following specific aims: Aim 1: To investigate the feasibility, safety and efficacy of 12-weeks of home-based FES and task-specific training in adults with chronic stroke. Aim 2: To examine the effect of 12-weeks of home-based FES and task-specific training on mobility, gait and balance (anticipatory and reactive balance) in adults with chronic stroke.

The Effect of Robot-assisted Gait Training in Individuals With Chronic Stroke

The aim of our study was to investigate the effect of robot-assisted gait training on quadriceps muscle thickness, balance and gait parameters in individuals with chronic stroke. For these purposes:-Improving gait and balance functions of patients with chronic stroke,-Increasing functional independence in daily life with walking trainings-Increase lower extremity muscle thickness with walking training, To investigate the effects of robot-assisted gait training on quadriceps muscle thickness, balance and gait parameters in individuals with chronic stroke.-It is aimed to contribute to the literature in this field by transforming the results to be obtained as a result of the study into a scientific publication

Outcomes and Health Economics of Stroke Using Rhythmic Auditory Stimulation

The purpose of this trial is to assess engagement, efficacy, durability, and impact on health care resource utilization of MR-001 in persons with chronic stroke who have a gait deficit after in-home/community use.

Effects of Transcutaneous Electrical Nerve Stimulation on Cognitive Function and Upper Limb Motor Function in People With Chronic Stroke

Upper limb impairment is present in more than 85% of people with stroke, which greatly affect the quality of life, social participation, and performance of daily activities of people with stroke. Previous study also revealed that 53.4% of people after stroke experienced cognitive impairment. Different cognitive domains might be affected following stroke, such as attention, memory, language, and orientation, and the problems with memory are often prominent. Yet, there is no effective treatment for the post-stroke cognitive impairment. Transcutaneous spinal cord stimulation (tSCS) and transcutaneous vagus nerve stimulation (tVNS) are simple and non-invasive treatment to improve upper limb motor function and cognitive function. However, no existing studies have explored on the effects of tSCS and tVNS on cognitive function in people with stroke. Therefore, the purpose of this study is to evaluate the effectiveness of transcutaneous electrical nerve stimulation (TENS) on improving upper limb function and cognitive function in people with chronic stroke.

Investigating the Impact of Afferent Stimulation on Proprioceptive Function in Post-Stroke Rehabilitation

The objective of this study is to assess the functionality of a sensory stimulation device that uses mechanical vibrations and low-intensity electrical currents to deliver proprioceptive feedback to stroke patients regarding their movements.

Paired Vagus Nerve Stimulation Mechanisms

In this mechanistic study, 40 individuals with chronic stroke will be implanted with a small vagus nerve stimulation (VNS) device. The study will use a randomized, blinded, crossover design to deliver two conditions in six-week blocks: active VNS or sham VNS, each paired with upper extremity (UE) motor rehabilitation. Assessment visits will occur before and after each block, and will examine neural pathway strength, functional connectivity, and motor and non-motor behaviors. Investigators will test for VNS-induced changes in motor, cognitive, and affective systems, and will identify biomarkers predictive of clinical response.

Plantar Sensation, Position Sense, and Weight-Bearing Asymmetry Related to Balance and Mobility Post-Stroke

This study aims to examine how sensory deficits and weight-bearing asymmetry affect posture, balance, and mobility in individuals with chronic stroke. The research focuses on evaluating the relationships between plantar foot sensation, lower extremity position sense, and asymmetrical weight distribution with functional abilities such as walking and postural control. Participants will undergo non-invasive assessments, including sensation tests, mobility and balance evaluations, and postural measurements. A total of 24 individuals with chronic stroke who are receiving physiotherapy at a rehabilitation center in Konya, Türkiye, will be included. The results of this observational, cross-sectional study may contribute to a better understanding of the sensory-motor interactions in stroke survivors and support the development of more targeted rehabilitation strategies.

Exoskeleton Research: Myoelectric Orthosis for Rehab of Severe Chronic Arm Motor Deficits

This study will evaluate the effects of combining motor learning-based therapy with use of the MyoPro , a wearable exoskeletal myoelectrically controlled orthotic device. MyoPro uses electromyographic (EMG) signals from the weak muscles to assist movement of the user's affected arm. The primary objective of this randomized controlled trial is to study the efficacy of using MyoPro in motor learning-based therapy for individuals with chronic stroke (\>6 months post) with severe upper limb motor deficits (Fugl-Meyer for Upper Limb score less than 30) compared with a similar dose of motor learning-based therapy alone. The secondary objectives are to evaluate neuroplasticity mechanisms, identify biomarkers of greater response to the intervention, and explore cost-effectiveness.

pBFS-guided iTBS Over the Left DLPFC for Chronic PSCI

The study aims to investigate the efficacy and safety of intermittent theta burst stimulation (iTBS) guided by the personalized Brain Functional Sector (pBFS) technique in the treatment of patients with chronic post-stroke cognitive impairment.

Hand Rehabilitation Study for Stroke Patients

The purpose of this study is to find out what are the best settings for applying electrical nerve stimulation over the skin for the short-term improvement of hand dysfunction after a stroke. The ultimate goal is to some day design an effective long-term training program to help someone recovery their ability to use their hands and function independently at home and in society. In order to know how to apply electrical nerve stimulation to produce a good long-term effect on hand dysfunction, the investigators first need to know how to make it work best in the short-term, and improve our understanding of for whom it works and how it works. The investigators will use a commercially available transcutaneous electrical nerve stimulation (TENS) unit to gently apply electrical nerve stimulation over the skin of the affected arm. This is a portable, safe and easy to use device designed for patients to operate in their homes.