Overview
This study investigates the immediate effects of different parameters (frequency, intensity, and pulse number) of peripheral magnetic stimulation (rPMS) on cortical excitability in healthy individuals. Using a randomized, double-blind crossover design, the research aims to identify optimal stimulation protocols for modulating neural activity. Outcomes include measurements of motor-evoked potentials (MEPs), intracortical inhibition (ICI), and facilitation (ICF). Findings may enhance non-invasive therapeutic strategies for neurological disorders.
Description
This clinical trial is a crossover trial comparing 9 single-session rPMS protocols over the extensor carpi radialis muscle, testing three frequencies (1Hz, 10Hz, 25Hz), intensities (90%, 100%, 110% of resting motor threshold) across sequential phases.
Participants: Healthy adults (18-40 years) undergo pre-/post-intervention assessments: cortical (MEPs, ICI/ICF) excitability.
Design: Crossover, double-blind.
Analysis: ANOVA or Friedman tests (SPSS v20.0; α=0.05).
Significance: Clarifies parameter-specific neuromodulatory effects, guiding future rehabilitation protocols for neurological conditions.
Ethics: Approved by Federal University of Pernambuco's ethics committee (Resolution 466/12). Data stored securely for 5 years.
Eligibility
Inclusion criteria: Healthy adults aged 18-40 years, both sexes, right-handed (confirmed via Edinburgh Handedness Inventory), and for females, consistent use of contraceptive medication to mitigate hormonal influences on nervous system excitability.
Exclusion criteria: Pregnancy; history of seizures or epilepsy; metallic implants in the head, spine, face, or heart; diagnosed neurological or musculoskeletal conditions interfering with assessments or interventions; or use of substances altering nervous system excitability.