Evaluating diaphragm motor response variability in electric and magnetic phrenic nerve stimulations during passive expiration.

ABSTRACT:

Objective

This study assessed variability in cervical electrical (CEPNS) and magnetic (CMPNS) phrenic nerve stimulation alongside transcranial magnetic stimulation (diTMS) of the diaphragm, focusing on motor response latency and amplitude at individually calculated suprathreshold intensities.

Methods

Diaphragm motor responses were elicited via CEPNS and CMPNS (measuring compound muscle action potentials, CMAPs) and diTMS (measuring diaphragm motor evoked potentials, diMEPs). Latency and amplitude were recorded. Statistical analyses compared methods, evaluated variability using coefficients of variation (CV), and explored associations with height and central motor conduction time.

Results

Among 25 participants (mean age 25 ± 4 years), CMPNS evoked CMAPs in 21 subjects,

SUBMITTER: Chakalov I 

PROVIDER: S-EPMC12702034 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature