The Role of Sural Nerve Reflex During Jump Landing in Subjects with and without Chronic Ankle Instability

L
Leif Madsen

Primary Investigator

Overview

Previous research has found that people who sustain an ankle sprain are much more likely to injure their ankle again in the future. Our goal with this present study is to further investigate how nerves around the ankle help the muscles in the lower leg prepare for jump landings, and whether people with a history of ankle sprains have signs of altered nerve function.

Description

Participants will participate in a single data collection session in the school of public health for approximately 2 hours.  During the data collection session, participants complete 2 questionnaires, and researchers will measure height and weight as well as determine dominant limb. Researchers will then place 9 non-invasive electrodes below the knee and an electric goniometer around the ankle of the leg to be tested.
Participants will then complete a warm-up 5-minute treadmill walk and stretch. Researchers will place a stimulating electrode above the ankle and slowly raise intensity until participants feel a "pins and needles" sensation. Participants will then complete drop landing trials, standing on a raised platform (approximately 1 1/2 feet tall) on one leg with hands on hips and then dropping to the floor landing on the test leg.  Nerve stimulations will occur randomly throughout the drop landing trials. 
 
Participants will perform approximately 60 drop landings, which accounts for 10 practice trials (3 trials without error needed), 20 unstimulated trials, 15 stimulated trials, and a total of 15 failed trials (if necessary).  

Eligibility

You may be eligible for this study if you meet the following criteria:

  • Conditions:
    2001968860,Chronic Ankle Instability,Healthy,2001968860
  • Age: Between 18 Years - 30 Years
  • Gender: All

Individuals between 18 and 30 years of age who complete 120 minutes of physical activity weekly at a moderate intensity.
Individuals who have had re-occurring knee problems or a lower extremity injury in the last 6 weeks will not be eligible.
Individuals with previous lower extremity surgical intervention, neuromuscular disorders, intermittent claudication, uncontrolled high blood pressure, or myocardial infarction or congestive heart failure will not be eligible.

Additional Information:

Updated on 09 Mar 2024. Study ID: 2001968860

Connect with a study center near you

What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact

site

Interested in the study?

Select a study center that’s convenient for you, and get in touch with the study team.

Contact a study center