Investigating Central Contributions to Fatigue Using Non-invasive Brain Stimulation
Investigating the Causal Contribution of Neural Oscillations to Neuromuscular Fatigue After Stroke Using tACS
The goal of this interventional study is to understand the contribution of the central components to the manifestation of neuromuscular fatigue in stroke survivors. The study will include adults with a first-ever stroke in the subacute phase.
The main question it aims to answer:
• How does the brain activity contribute to the manifestation of neuromuscular fatigue in stroke survivors?
Researchers will compare stroke participants receiving active vs sham tACS in a single session before the fatiguing contractions to determine whether central changes can influence fatigue onset/progression.
Participants will:
- Perform repeated leg muscle contractions until fatigue while seated in an experimental setup
- Receive either active or sham tACS for 20 minutes before the fatiguing contractions.
- Wear non-invasive sensors to record brain activity (EEG) and muscle activity (EMG) during the task
- Complete the study during a single experimental session in which fatigue-related changes will be measured throughout the task
연구 개요
상태
연구 유형
등록 (추정된)
단계
- 2 단계
- 1단계
참여기준
자격 기준
공부할 수 있는 나이
- 성인
- 고령자
건강한 자원 봉사자를 받아들입니다
설명
Inclusion Criteria:
First-ever stroke
≥18 years Subacute phase: 1 week to 6 months post-stroke Quadriceps (hemiplegic side) strength ≤3/5 (Medical Research Council (MRC)) Montreal Cognitive Assessment (MoCA) ≥21
Exclusion Criteria:
History of a previous stroke Severe spasticity (Modified Ashworth Scale (MAS) 3-4 in quadriceps/hamstrings) Other neurological, motor, musculoskeletal, or orthopedic conditions affecting trunk stability and lower limb mobility Non-cerebral strokes (e.g., brainstem, cerebellar), or dementia (MoCA ≤20) Current or former athletes. Athletes are defined as individuals who participated in organized competitive sports and engaged in structured training ≥3 sessions per week for ≥1 year within the 5 years preceding stroke Contraindications for tACS (e.g., presence of a deep brain stimulator, pacemaker, head wound, etc.).
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 기초 과학
- 할당: 무작위
- 중재 모델: 크로스오버 할당
- 마스킹: 하나의
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
|---|---|
|
가짜 비교기: 가짜 tACS
|
mimics active tACS but stops after 1 minute
|
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활성 비교기: Active tACS
|
Transcranial alternating current stimulation (tACS) is a non-invasive brain stimulation technique that uses electrodes on the scalp to apply weak alternating electrical currents to the brain.
|
연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Absolute and relative spectral power and ERD/ERS magnitude
기간: Outcome measure will be recorded at baseline and throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
Fatigue-related changes in sensorimotor cortical activity will be assessed using EEG-derived absolute and relative spectral power in the mu (8-12 Hz), beta (13-30/35 Hz), and gamma (30/35-100 Hz) frequency bands, as well as changes in event-related desynchronization/event-related synchronization (ERD/ERS) magnitude over time.
Measurements will be obtained at pre-fatigue baseline and continuously during the fatiguing task, with data segmented into contraction epochs and grouped into four fatigue phases for analysis.
|
Outcome measure will be recorded at baseline and throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
|
EMG median frequency
기간: Outcome measure will be recorded throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
Peripheral manifestations of fatigue will be assessed using shifts in EMG median frequency during repeated contractions.
Data will be recorded continuously during the task and analyzed across contraction epochs grouped into four fatigue phases.
|
Outcome measure will be recorded throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
|
Time-to-task failure (TTF)
기간: Outcome measure will be recorded throughout the fatiguing contractions until exhaustion
|
The duration a participant can sustain the prescribed fatiguing exercise until exhaustion
|
Outcome measure will be recorded throughout the fatiguing contractions until exhaustion
|
2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
|
Corticomuscular coherence
기간: Outcome measure will be recorded throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
The interaction between cortical and muscular activity will be assessed using CMC, which quantifies synchronization between EEG and EMG signals.
Corticomuscular coherence will be assessed from simultaneous EEG and EMG recordings during repeated contractions and analyzed across contraction epochs grouped into four fatigue phases.
|
Outcome measure will be recorded throughout the fatiguing contractions in the single experimental session (up to 40 minutes) and compared over 4 fatigue phases.
|
공동 작업자 및 조사자
연구 기록 날짜
연구 주요 날짜
연구 시작 (추정된)
기본 완료 (추정된)
연구 완료 (추정된)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- NMF_STROKe_tACS_FWO
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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