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Controlling Locomotion Over Continuously Varying Activities for Agile Powered Prosthetic Legs

University of Michigan · NCT06138977

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 18–65 · All sexes
Healthy volunteers
Accepted
Study type
Interventional · Not applicable
Target enrollment
40
US sites recruiting
1
Study start
December 6, 2023
Record last updated
September 16, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

The overall goal of this project is to model human joint biomechanics over continuously-varying locomotion to enable adaptive control of powered above-knee prostheses. The central hypothesis of this project is that variable joint impedance can be parameterized by a continuous model based on measurable quantities called phase and task variables. This project will use machine learning to identify variable impedance functions from able-bodied data including joint perturbation responses across the phase/task space to bias the solution toward biological values.

Being studied: Powered prosthesis

Conditions: Amputation

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion criteria for able-bodied participants will be:

  • Aged between 18 to 65 years

Exclusion criteria for able-bodied, young adult participants will be:

  • Pregnant (self-report)
  • Any significant neuromuscular or musculoskeletal disorder that would interfere with the study
  • Unable to walk for 20 minutes
  • History of any cardiovascular, vestibular, or visual diseases and/or impairments that may interfere with the study
  • Cognitive deficits that would impair their ability to give informed consent or impair their ability to follow simple instructions during the experiments. In the case of screening for cognitive deficits, the consenting researcher will ask the subject if he/she has any prior history of cognitive deficits.
  • Adults with a known allergy to medical grade tape

Inclusion criteria for subjects with amputation will be:

  • Aged between 18 to 70 years.
  • Weigh less than 250 lbs due to limitations in the design of the prosthesis.
  • Amputee subjects will be more than two months post independent ambulation with an amputation at the transfemoral level in order to use the above-knee prosthesis.
  • Amputee subjects will have a mobility classification of K2/K3/K4 ambulators (minimum community ambulatory) and have the ability to ambulate without an assistive device beyond their prosthesis.

Exclusion criteria for subjects with amputation will be:

  • Weigh over 250 pounds body
  • Pregnant (self-report)
  • Any significant neuromuscular or musculoskeletal disorder that would interfere with the study
  • Inactive or physically unfit, unable to walk for 20 minutes
  • An excessively long residual limb length, and/or a non-removable cosmetic cover determined by the prosthetist performing the evaluations
  • Cognitive deficits or visual impairment that would impair their ability to give informed consent or impair their ability to follow simple instructions during the experiments. In the case of screening for cognitive deficits, the consenting researcher will ask the subject if he/she has any prior history of cognitive deficits.
  • Co-morbidity that interferes with the study (e.g., pace maker placement, severe ischemia, cardiac disease, etc.)
  • Adults unable to consent
  • Adults with a known allergy to medical grade tape

Recruiting US locations

  • Rehab Lab, University of Michigan

    Ann Arbor, MI 48109

    Site contact: Kashvi Pota, MS · 734-763-1156 · kashvip@umich.edu

Study contacts (from the official record)

  • Kashvi Pota, MS · 734-763-1156 · kashvip@umich.edu
  • Robert D Gregg, PhD · 734-763-1156 · rdgregg@umich.edu
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Controlling Locomotion Over Continuously Varying Activities for… (NCT06138977) | Bored Studies