Study Purpose:The specific aims of this study are to:
1. Determine if a painless and quick measurement of muscle activity using surface electrodes can help with the diagnosis of ALS. Specifically, we ask if a measure of intermuscular coherence (IMC-βγ), when added to current diagnostic criteria (Awaji criteria), can differentiate ALS from mimic diseases more accurately and earlier than currently possible.
2. Characterize IMC-βγ in neurotypical subjects by age, sex, race, and ethnicity.
3. Follow a cohort of ALS patients longitudinally to determine if IMC-βγ changes with ALS disease progression and whether such changes correlate with functional and clinical scores, or survival.
Amyotrophic Lateral Sclerosis
Type of Intervention:
Study Chair(s)/Principal Investigator(s):
Kourosh Rezania, MD, University of Chicago
Coordinating Center Contact Information
University of Chicago
Full Study Summary:
This is a multi-center trial to validate a potential biomarker for ALS, known as intermuscular coherence (IMC-βγ). IMC measures the correlation in the activity of two muscles during a simple motor task. In a preliminary study we found that patients with ALS have lower IMC than do control subjects. Because measuring IMC is quick, non-invasive, painless, and only requires equipment readily available in standard clinical neurophysiology labs, if validated it would be an important biomarker for ALS.
University of Chicago
Estimated Study Start Date:
03 / 31 / 2021
Estimated Study Completion Date:
12 / 31 / 2025
Posting Last Modified Date:
11 / 05 / 2021
Date Study Added to neals.org:
11 / 03 / 2021
Can participants use Riluzole?
- AIM 1: Patients with arm or leg weakness, spastic gait, muscle wasting and/or fasciculations (muscle twitching), dysphagia (difficulty swallowing), dysarthria (difficulty speaking), shortness of breath, hyperreflexia or pathological reflexes, or findings of muscle denervation in previous needle electromyography (EMG) studies.
- AIM 2: Subjects between 20 and 80 years of age.
- AIM 3: Subjects will be selected from among Aim 1 patients who carry an Awaji (without IMC) category of Possible, Probable, or Definite ALS.
- AIM 1:
1. Classified as probable or definite ALS by Awaji criteria prior to initial study evaluation
2. Have significant sensory loss in the weak or spastic limbs
3. Have significant musculoskeletal or neuropathic pain
4. Have an inability or are unwilling to provide informed consent
5. Are unable to perform the study-related task
6. Are taking baclofen or benzodiazepines
7. Have a known non-ALS cause for symptoms
- AIM 2:
1. Have a history of neurological disorders such as stroke, neuropathy, or myopathy
2. Have significant pain or sensory loss
3. Are taking baclofen or sedatives such as benzodiazepines
4. Lack of cognitive ability or willingness to provide informed consent
- AIM 3:
1. Were unclassified according to the Awaji category or had a defined ALS mimic
2. Are taking baclofen, sedatives or benzodiazepines.
NOTE: Participation in a therapeutic clinical trial is NOT an exclusion criterion since this study would not interfere with any potential interventions.
University of California Center for Clinical Research | Recruiting
Principal Investigator : Ali A Habib, MD
Massachusetts General Hospital | Recruiting
Principal Investigator : William S David, MD
Washington University Medical Center | Recruiting
Principal Investigator : Robert Bucelli, MD
Saint Louis, Missouri