Brain Stimulation: Active Motor Threshold

Our laboratory uses a brain stimulation technique known as transcranial magnetic stimulation, or TMS, to study changes in the nervous system following interventions. TMS data can be highly variable, so we are interested in finding ways of improving our methodology. This research is being done to compare different techniques commonly used to determine optimal TMS levels for research participants. This study will help UCF researchers understand how these techniques impact TMS research protocols and improve their testing methods when studying neuromuscular plasticity.

If you agree to participate in this study, you will be required to visit the Neuromuscular Plasticity Laboratory for two visits. We expect each visit to last approximately two hours. Upon arrival at the laboratory, we will ask you to fill out screening questionnaires, and conduct a series of tests to assess your neuromuscular function, as well as muscular strength. It is requested that you wear comfortable, athletic shorts. Researchers will ask that you avoid strenuous exercise, such as heavy strength or endurance training, 48 hours prior to each visit. In addition, you will be asked to avoid caffeine and alcohol for 4 and 24 hours, respectively, prior to each visit.

If you are interested in participating, please fill out the “Participant in this Research” box, and click the “Participate” button. A member of the research team will reach out to you and set up a phone call to discuss more about the study and determine whether you qualify!

Inclusion Qualifications:

  • Healthy adult aged 18-30, with a body mass index between 18.5-35.0 kg/m2
  • Willingness to comply with exercise, caffeine, and alcohol requirements.
  • Willingness to perform maximal strength testing and undergo brain stimulation.
  • Have no other major underlying health concerns and circumstances as described in the pre-enrollment health screen administered before enrollment.

Exclusion Qualifications:

You may not participate in this research opportunity if any of the following applies to you:

(You may not participate in this study if any of the following applies to you)

  • History of major musculoskeletal injury or surgery
  • Neuromuscular disease (e.g., Parkinson’s, MS, ALS)
  • Metabolic disease (e.g., diabetes, thyroid disorder, metabolic syndrome)
  • Trouble using or controlling one’s muscles
  • History of cancer
  • History of stroke
  • History of heart attack
  • History of arthritis
  • Use of an assistive walking device or mobility aid within the previous six months
  • Use of anabolic steroids within the past six months
  • History of convulsions, seizures, or syncope
  • History of concussion, as diagnosed by physician
  • Certain medications (e.g., muscle relaxants, benzodiazepines)

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UCF IRB#: 00004836
PI: Matt Stock
Please consider subscribing to get notified about future research participation opportunities
Recruitment End Date:
June 14, 2023
Education Complex and Gym
12494 University Boulevard
Orlando, FL 32816
Time Commitment:
Number of visits: 2
Expected time per visit: 2 hours
Type: $5 Amazon Gift Card per lab visit
Point of Contact:
Jonathan Beausejour
Faculty Advisors:
Matt Stock
Associated Units:
Athletic Training
Physical Therapy
Exercise Physiology & Rehabilitation Science
Short URL:

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