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RecruitingNCT07218276ClinicalTrials.gov record

Passive Robots for Stroke Rehabilitation: A Feasibility Study

Stroke

THE QUICK READ

What this study involves

The registry says this study is recruiting. Individual locations may have different availability.

Study type
Interventional
Phase
Not applicable
Age range
18 years - 75 years
Sex eligible
All sexes
Healthy volunteers
Not accepted
Participants
4 Estimated

These are starting points, not an eligibility decision. The research team must review the full requirements.

About the research

The purpose of this study is to examine the feasibility and effectiveness of a novel, multimodal approach that combines passive devices with noninvasive neuromuscular stimulation for upper extremity rehabilitation after stroke.

Read the full description

About 800,000 individuals suffer from a stroke every year in the United States. The majority of stroke survivors often experience lingering deficits in upper extremity function. High-end robotic devices can improve outcomes and clinical productivity; however, these devices are expensive and bulky, making them not practical for many clinical or home environments. This study aims to evaluate the feasibility of low-cost non-motorized devices for stroke rehabilitation in a long-term intervention. The intervention will involve training with a table-top, semi-passive (i.e., no motors) exercise equipment called SepaRRo and commonly-used neuromuscular stimulation. The stimulation will be provided during functional activities using a custom controller (NeuRRoFES) to trigger stimulation. These instruments are designed to provide flexible, compliant assistance/resistance to improve upper extremity function and can be used in a home setting. The study will measure technical feasibility (e.g., qualitative survey, adherence, time on task, retention, ability to perform tasks) as well as clinical feasibility (i.e., changes in biomechanical, neurophysiological, and functional measures) of an intervention with these devices in stroke survivors. The findings aim to support the development of affordable, home-use rehabilitation systems for stroke patients.

Who may be able to participate?

The list below is the sponsor’s full registry wording. It can include conditions, prior treatment, test results and other requirements. A match in search does not mean you qualify.

Inclusion Criteria:

  • Age 18 to 75 years;
  • Ischemic or hemorrhagic stroke confirmed by CT, MRI, or clinical criteria;
  • No major deficits of sensation or proprioception;

Exclusion Criteria:

  • Bilateral stroke
  • Unable to think clearly and remember (Mini-Mental State Exam score \< 22 and miniMOCA \< 8);
  • Uncontrolled Diabetes or Hypertension;
  • Severe limitations of joint range of motion that will lead to inability of testing
  • Severe spasticity and joint contractures that will lead to inability of testing
  • Complete paresis with no possible movements
  • Severe aphasia
  • Any other medical condition that will significantly impact the study results
  • Unable to obtain reliable motor evoked potentials
  • Are pregnant or are actively trying to conceive
  • Have a recent history of repeated fainting spells or syncope.
  • Have a recent history of seizure (epilepsy) while on anti-seizure medication
  • Have a recent history of skull fracture/head injury
  • Have metal implants in the skull
  • Have cardiac pacemakers
Understand screening

Treatment, groups and participation

The registry may describe treatments and study duration without a complete visit calendar. Ask the study team for the exact schedule, procedures, risks, costs and alternatives. Keep your usual care plan unless your treating clinician tells you otherwise.

Assignment
Not applicable
Masking
No masking
Robotic Intervention

Participants will receive upper extremity rehabilitation using SepaRRo and NeuRRoFES 2-5 times per week for 2-6 weeks

Device: Functional Training with SepaRRo and NeuRRoFES

Functional Training with SepaRRo and NeuRRoFES DEVICE

Participants will perform functional movements (e.g., reach for targets) with their extremities. During movements, the devices will be used to assist or resist their motion. Participants may receive biofeedback of their movements to better engage them in training. Participants may receive assistance from the devices (including neuromuscular stimulation) and/or their less-impaired limb.

Prepare your questions

What researchers are measuring

Outcome measures describe what is being studied. They are not proof that a treatment works.

Primary measures

Device Survey For Feasibility

Time frame: Post-intervention (immediately following last session of intervention)

Subjective feedback regarding feasibility of the device for training

Other measures

Retention

Time frame: Post-intervention (immediately following last session of intervention)

Measure of how many participants completed intervention

Adherence

Time frame: Post-intervention (immediately following last session of intervention)

Measure of percentage of sessions completed

Upper extremity Fugl-Meyer Score

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively.

Changes in upper extremity Fugl-Meyer score from before the intervention (from baseline) to after its completion using publicly available scoring sheets. The Fugl-Meyer score is a measure of functional impairment and runs from 0 to 66 points, with higher numbers reflecting better outcome.

Reachable workspace

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in reachable workspace from before the intervention (from baseline) to after its completion). The reachable workspace area will be measured with SepaRRo obtained from optical encoders mounted in the device.

Voluntary hand opening

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in voluntary ability to open the hand from before the intervention (from baseline to after its completion). Voluntary hand opening will be measured with motion capture equipment.

Action Research Arm Test Score

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in the Action Research Arm Test Score from before the intervention (from baseline) to after its completion using publicly available scoring sheets. The Action Research Arm Test is a measure of arm functional ability and runs from 0 to 57 points, with higher numbers reflecting better outcome.

Box and Block (BBT)

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in functional measure of arm disability (BBT) from before the intervention (from baseline) to after its completion using publicly available scoring sheets.

Hand Strength

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in force produced by the hand from before the intervention (from baseline) to after its completion as measured by force production recorded with a dynamometer

Arm strength

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in force produced by the arm from before the intervention (from baseline) to after its completion as measured by force production recorded with a dynamometer

Muscle coordination

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in muscle coordination of the upper extremity muscles as measured using surface electromyography between before the intervention (from baseline) to after its completion.

Joint coordination

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in coordination of the upper extremity joints as measured motion capture between before the intervention (from baseline) to after its completion.

Corticospinal excitability

Time frame: Baseline and post-intervention measurements will be taken on separate days, within a week of the first and last sessions of the intervention, respectively

Changes in corticospinal excitability of the upper extremity muscles as measured using surface electromyography and transcranial magnetic stimulation between before the intervention (from baseline) to after its completion

No results are flagged as posted.

Review the complete result tables and limitations in the official record.

Open official results ↗

Research locations (1)

The overall study status and a local site’s status can differ. Confirm that location’s availability before traveling.

1 locations

University of Michigan - NeuRRo LabAnn Arbor, Michigan, United StatesRecruiting
Thomas E. Augenstein, PhDCONTACTtomaugen@umich.edu(734) 936-4031
Chandramouli Krishnan, PT PhDPRINCIPAL_INVESTIGATOR
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Study team and timeline

Lead sponsor
University of Michigan
Study start
Nov 5, 2025 Actual
Primary completion
Oct 1, 2027 Estimated
Study completion
Oct 1, 2027 Estimated
First posted
Oct 20, 2025 Actual
Last updated
Nov 10, 2026 Actual

Official study contacts

Chandramouli Krishnan, PT, PhDCONTACTmouli@umich.edu7349364031
Thomas E Augenstein, PhDCONTACTtomaugen@umich.edu7342320898
Official study title

Passive Robots for Stroke Rehabilitation

A HUMAN NEXT STEP

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Source: ClinicalTrials.gov API v2. Information is submitted by sponsors and investigators. NLM does not approve the safety or science of all listed studies. Registry disclaimer.

Retrieved: Nov 12, 2026 · Last registry update: Nov 10, 2026