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Spinal Cord InjuriesEarly Phase 1NCT04105114

Transformation of Paralysis to Stepping

A Early Phase 1 study testing Buspirone, Non-invasive Spinal Cord Stimulation and Overground stepping in people with Spinal Cord Injuries, run by University of Louisville at 1 site in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The main goal of the project is to develop multiple noninvasive neuromodulatory strategies to facilitate full weight bearing stepping overground in people with paralysis. We will determine the effectiveness of combining noninvasive spinal cord stimulation and the administration of buspirone (a monoaminergic agonist)… Read more about this study

Who is it for?
Ages 18 to 65 years
Conditions the study is for
Spinal Cord Injuries
What is being tested?
Buspirone, Non-invasive Spinal Cord Stimulation and Overground stepping
Could I receive a placebo?
No, everyone receives an active treatment
How many people
15 participants
Where
1 siteUnited States
Study dates
30 Sep 2019to 31 Dec 2027
Phase
Early Phase 1
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Participants with Motor Complete SCI:
  • 18-65 years old,
  • Stable medical condition,
  • At least 1-year post-injury,
  • Non-progressive SCI,
  • Motor complete paraplegia: Unable to voluntarily move any joint of the lower limbs,
Show all 16Show fewer
  • Inability to walk independently due to SCI,
  • Presence of active spinally evoked responses over the lumbo-sacral spinal cord using spinal Cord Transcutaneous Stimulation (scTS).
  • Participants with Motor Incomplete SCI:
  • 18-65 years old,
  • Stable medical condition,
  • At least 1-year post-injury,
  • Non-progressive SCI,
  • Motor incomplete paraplegia: Able to voluntarily move at least 1 joint of the lower limbs bilaterally,
  • Inability to walk independently in the community due to SCI,
  • Presence of active spinally evoked responses over the lumbo-sacral spinal cord using scTS.

Who cannot join

  • Untreated pressure sores,
  • Unhealed bone fractures,
  • Untreated active urinary tract infections,
  • Peripheral lower limb neuropathies unrelated to SCI,
  • Seizure disorders,
  • Cardiopulmonary disease unrelated to SCI,
Show all 15Show fewer
  • Untreated anemia,
  • Ventilator dependency,
  • Female participants: Pregnant or planning to become pregnant during the time course of study, or nursing,
  • Healing wounds/surgical sites along the spine, levels T9-L5,
  • Anti-spasticity implantable pumps,
  • Untreated clinically significant depression, psychiatric disorders, or ongoing drug abuse,
  • Colostomy bag, urostomy,
  • Individuals with abnormal blood panel results related to hepatic function, Individuals with abnormal estimated glomerular filtration rate (eGFR) and increase Creatinine Clearance (CrCl) levels above the normal range,
  • Individuals unwilling or unable to wean from drug(s) that interact(s) with buspirone, such as: Monoamine oxidase inhibitors (MAOIs) - Selegiline (Emsam), Isocarboxazid (Marplan), Phenelzein (Nardil), and Tranylcypromine (Parnate).

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Frazier Rehabilitation and Neuroscience Institute

    Louisville, Kentucky, 40202

Other trials in United States

About this study

Official title: Transformation of Paraplegic Paralysis to Overground Stepping in Humans

The main goal of the project is to develop multiple noninvasive neuromodulatory strategies to facilitate full weight bearing stepping overground in people with paralysis. We will determine the effectiveness of combining noninvasive spinal cord stimulation and the administration of buspirone (a monoaminergic agonist) in facilitating locomotor activity in a gravity-neutral apparatus, during body weight supported stepping on a treadmill, when stepping overground, or during full weight bearing stepping overground in a rolling walker. Our objective is to identify the experimental variables that define the efficacy of these novel neuromodulatory techniques over a 5 year period in 15 participants with severe spinal cord injury who are at least one year post-injury.

Read the detailed description

Aim 1: Define the relative effectiveness of transcutaneous electrical stimulation at multiple stimulation spinal sites and oral Buspirone in facilitating nonweight-bearing (gravity neutral device, GND) and weight-bearing (treadmill) stepping in individuals with chronic motor complete paralysis.

Aim 1.1: Define the relative effectiveness of transcutaneous electrical stimulation at multiple spinal sites to facilitate non-weight-bearing (GND) and weight-bearing (treadmill) stepping in spinal cord injury subjects.

Aim 1.2: Define the relative effectiveness of transcutaneous electrical stimulation at multiple spinal sites plus oral Buspirone to facilitate nonweight-bearing (gravity neutral device, GND) and weight-bearing (treadmill) stepping in spinal cord injury subjects.

Aim 2: Determine the relative effectiveness of overground LT combined with transcutaneous electrical stimulation and/or oral Buspirone in lowering the robotic assistance and enhancing the ability to step self-assisted in a rolling walker during over-ground stepping in individuals with a chronic, severe (AIS A/B) spinal injury.

Aim 3: Determine the relative effectiveness of overground LT combined with transcutaneous electrical stimulation and/or oral Buspirone in lowering the robotic assistance and enhancing the ability to step self-assisted in a rolling walker during over-ground stepping in individuals with motor incomplete (AIS C) paralysis.

Being tested
Buspirone, Non-invasive Spinal Cord Stimulation, Overground stepping, Gravity Neutral Device, Body Weight Supported Treadmill Training
Keywords
Walking, Transcutaneous Stimulation, Locomotion, Paralysis, Buspirone, Motor Control, Spinal Stimulation
Medical subject headings
Spinal Cord Injuries, Paralysis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • BuspironeDrug

    Also called Buspar

    Oral Buspirone 7.5mg - 10mg daily during the treatment phase.

  • Non-invasive Spinal Cord StimulationDevice

    A non-invasive transcutaneous electrical spinal cord stimulator, which can be used a multiple spinal locations.

  • Overground steppingDevice

    This intervention is designed to assist people with neurological injuries for balance, standing, and stepping overground.

  • Gravity Neutral DeviceDevice

    This device is used to train and assess non-weight bearing stepping movements. When using the device, participants will be lying on their side with their legs suspended off the end of a table supported by small slings that are anchored securely to the apparatus.

  • Body Weight Supported Treadmill TrainingDevice

    Participants will be supported by a special harness while they are stepping on a treadmill. Trained technicians or therapists will be assist the trunk and legs during stepping as needed.

  • Rolling WalkerDevice

    A standard rolling walker will be used for balance support and stability during stepping overground.

Study groups in NCT04105114
Study groupRoleWhat they receive
Complete Spinal Cord Injury - Gravity Neutral SteppingExperimentalGroup 1 will begin with a 3-4-month preparation phase and up to 12 sessions in the gravity neutral device (GND) will occur. The training sessions in the GND will be used to obtain the optimal stimulation parameters. Next, participants will enter Intervention Phase 1 where they will receive training sessions 3 days/week for approximately 2 hours. This will be done in the GND in the presence of stimulation. Afterwards, Intervention 2 will include the same training procedures with the addition of Buspirone or Placebo in a cross-over fashion halfway through this phase.
Receives: Drug: Buspirone; Device: Non-invasive Spinal Cord Stimulation; Device: Gravity Neutral Device; Device: Body Weight Supported Treadmill Training
Complete Spinal Cord Injury - Overground SteppingExperimentalGroup 2 will begin with a 3-month preparation phase and up to 12 sessions of overground stepping. Next, participants will enter Intervention Phase 1 where they will receive training sessions 3 days/week for approximately 2 hours overground training, in the presence of stimulation and Buspirone/placebo. The second phase will include the same training procedures except for the removal of Buspirone/placebo administration. The third phase will include sessions twice per week of the overground with stimulation and one day per week using a rolling walker with stimulation. The last phase will include 2 sessions per week using the rolling walker in the presence of stimulation and Buspirone/placebo.
Receives: Drug: Buspirone; Device: Non-invasive Spinal Cord Stimulation; Device: Overground stepping; Device: Rolling Walker
Incomplete Spinal Cord Injury - Overground SteppingExperimentalGroup 3 will begin with a 3-month preparation phase and up to 12 sessions stepping overground. Next, participants will enter Intervention Phase 1 where they will receive training sessions 3 days/week for approximately 2 hours. The overground session will use the rolling walker in the presence of stimulation. Afterwards, the second phase will include the same training procedures with the addition of Buspirone/placebo.
Receives: Drug: Buspirone; Device: Non-invasive Spinal Cord Stimulation; Device: Overground stepping; Device: Rolling Walker

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Lower Extremity Electromyography, change over time

    Assessment of muscle activity, measured by electromyography, while the leg is suspended in a gravity neutral position.

    Measured: Before and after each study phase, 1 year per group.

  2. Lower Extremity Kinematics, change over time

    Assessment of low extremity 3D position, measured by motion analysis system, while the leg is suspended in a gravity neutral position.

    Measured: Before and after each study phase, 1 year per group.

  3. Treadmill Electromyography Assessment, change over time

    Muscle activity, measured by electromyography, will be recorded during weight supported stepping on a treadmill.

    Measured: Before and after each study phase, 1 year per group.

  4. Spinal Pathway Electrophysiology, change over time

    Evoked potentials in the lower extremities will recorded in response to nerve or spinal stimulation.

    Measured: Before and after each study phase, 1 year per group.

  5. Voluntary Lower Extremity Angles, change over time

    Assessments of knee, ankle, and toe movements will be performed by measuring angles produced during flexion and extension. The same units of measure will be used for each part of the leg.

    Measured: Before and after each study phase, 1 year per group.

  6. Voluntary Lower Extremity Forces, change over time

    Assessments of knee, ankle, and toe forces during movements will be performed by measuring forces produced during flexion and extension. The same units of measure will be used for each part of the leg.

    Measured: Before and after each study phase, 1 year per group.

  7. Body Temperature, change over time

    We will measure body temperature using standard methods to assess values at rest and during exercise.

    Measured: Before and after each study phase, 1 year per group.

  8. Blood Pressure, change over time

    We will measure blood pressure (systolic and diastolic) using standard methods to assess values at rest and during exercise.

    Measured: Before and after each study phase, 1 year per group.

  9. Heart Rate, change over time

    We will measure the heart rate using standard electrocardiography to assess values at rest and during exercise.

    Measured: Before and after each study phase, 1 year per group.

  10. Respiration Rate, change over time

    We will measure respiratory rate using standard methods to assess values at rest and during exercise.

    Measured: Before and after each study phase, 1 year per group.

  11. Dual-energy X-ray absorptiometry, change over time

    We will use dual-energy X-ray absorptiometry to measure bone and soft tissue density.

    Measured: Before and after each study phase, 1 year per group.

  12. Acoustic Gastro-Intestinal Surveillance, change over time

    We will use non-invasive sensors placed on the abdomen to detect signals related to the digestive state.

    Measured: Before and after each study phase, 1 year per group.

  13. Bladder capacity, change over time

    We will use a standard technique to measure bladder volume change during voiding.

    Measured: Before and after each study phase, 1 year per group.

  14. Urodynamics, change over time

    We will use a standard technique to measure the abdominal pressure change during voiding.

    Measured: Before and after each study phase, 1 year per group.

  15. Cognitive interference, change over time

    A cognitive assessment using Stroop test will be administered to assess cognitive function during stress.

    Measured: Before and after each study phase, 1 year per group.

  16. Assessment of verbal fluency, change over time

    Controlled Oral Word Association Test (COWAT) will be administered to assess verbal fluency that measures ability of spontaneous production of words.

    Measured: Before and after each study phase, 1 year per group.

Secondary outcomes (5)
  1. International Standards of Neurological Classification of Spinal Cord Injury, change over time

    This standard clinical assessment assess the level and severity of a spinal cord injury.

    The neurological level of injury is rated from A-E. "A" is a motor and sensory complete injury. "E" is completely normal at each spinal segment.

    Sensory function is rated as 0-2, or Not Testable. Motor function is rated as 0-5 or Not Testable.

    Measured: Before and after each study phase, 1 year per group.

  2. Spinal Cord Injury Functional Ambulation Inventory, change over time

    This 3-part scale measures gait parameters, use of assistive devices, and distances traveled during walking. The gait parameters are scored on a 20-point scale, the assistive device use on a 14-point scale, and the walking distance on a 5-point scale.

    Measured: Before and after each study phase, 1 year per group.

  3. Spinal Cord Independence Measure III, change over time

    This 3-part scale is scored out of 100 points possible. The first part (self-care) is scored out of 20. The second part (respiration and sphincter management) is scored out of 40. And the last part (mobility) is scored out of 40.

    Measured: Before and after each study phase, 1 year per group.

  4. Walking Index for Spinal Cord Injury-II, change over time

    This is a 20-point scale used to assess the amount of physical assistance needed during walking.

    Measured: Before and after each study phase, 1 year per group.

  5. Ashworth Scale, change over time

    This is a 6-part scale to measure and quantify the amount of muscle tone experienced when a joint is moved through a full range of motion.

    Measured: Before and after each study phase, 1 year per group.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 Sep 2019
  2. Study start30 Sep 2019
  3. Primary completion31 Aug 2025
  4. Study completion31 Dec 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Early Phase 1
Primary purpose
Basic science
Allocation
Non-randomised
Intervention model
Crossover
Model description
This is a double blinded crossover study with three experimental groups. Each group will receive a combination of activity based neuromodulation interventions while receiving oral Buspirone or placebo. The crossover between drug or placebo administration will occur at the study phase midpoint.
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
15 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04105114
Sponsor's protocol ID
19.0434
Other IDs
1R01NS102920-01A1
Status last verified
Mar 2026
First submitted
10 Sep 2019
Last updated
13 Mar 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Early Phase 1 study testing Buspirone, Non-invasive Spinal Cord Stimulation and Overground stepping in people with Spinal Cord Injuries, run by University of Louisville at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 16 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 13 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Early Phase 1 (sometimes called Phase 0) studies give a very small amount of a treatment to a few people, mainly to see how the body handles it.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Lower Extremity Electromyography, change over time (time frame: Before and after each study phase, 1 year per group.). The study lists 16 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Mar 2026.

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