Related Experiment Video
Updated: Jun 5, 2026
Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
Published on: September 13, 2015
Using Objective Response Detection techniques for detecting the tibial somatosensory evoked response with different
Danilo Barbosa Melges1, Antonio Fernando Catelli Infantosi, Antonio Mauricio Ferreira Leite Miranda de Sá
1Biomedical Engineering Program-Federal University of Rio de Janeiro (UFRJ), Av. Horácio Macedo 2030, Centro de Tecnologia, Bloco H, Sala 327, Cidade Universitária, P.O. Box 68510, Rio de Janeiro 21941-972, RJ, Brazil. danilomelges@yahoo.com
Abstract:
This work investigates the influence of the stimulus frequency in the performance of two Objective Response Detection (ORD) techniques, the Magnitude-Squared Coherence (MSC) and the Component Synchrony Measure (CSM), as applied in somatosensory stimulation. Electroencephalographic signals were collected (10-20 International System) from forty adult volunteers without history of neurological pathologies. The stimuli were applied to the right posterior tibial nerve at the frequencies of 2, 5, 7 and 9 Hz and motor threshold intensity level. The detection was based on the rejection of the null hypothesis of response absence (significance level α=0.05 and M=100 and 500 epochs). The performances of the MSC at the four stimulation frequencies were compared, two-by-two, using the Proportion Test applied to the mean percentage rates in the total (2-100 Hz) and optimal (20-60 Hz) bands. The same was proceeded to the CSM. The evaluated derivations were Cz, C4, Pz and P4. No significant difference was found for any studied technique (MSC or CSM), any M-value, at any derivation. Thus, the highest stimulation frequency (9 Hz) can be used in order to obtain a reduction in the time of response detection in an ORD approach for a fixed M-value.
