Logo Medical Science Monitor

Call: +1.631.470.9640
Mon - Fri 10:00 am - 02:00 pm EST

Contact Us

Logo Medical Science Monitor Logo Medical Science Monitor Logo Medical Science Monitor

31 August 2009

Noninvasive estimation of muscle fiber conduction velocity distribution using an electromyographic processing technique

Ken NishiharaACDEG, Yu ChibaABE, Hideki MoriyamaBCF, Masataka HosodaBCDF, Yosuke SuzukiACDF, Toshiaki GomiAEFG

Med Sci Monit 2009; 15(9): MT113-120 :: ID: 878162

Abstract

Background
Electromyography (EMG) is useful in investigating muscle activation; however, noninvasive evaluation of surface EMG is limited due to its complicated waveform. This study investigated muscle structure and activation using an analysis technique for surface EMG.
Material and Method
Surface array electrodes were used in 17 healthy male subjects to record eight-channel EMGs from each biceps brachii muscle during voluntary isometric contraction with a 1-kg weight band with the subjects seated. The peaks detected by referenced EMGs were normalized and averaged as averaged pulses (APs) and the innervation zone (IZ) was estimated from the APs. Muscle fiber conduction velocities (MFCVs), estimated by the time difference of the peaks (method P) and by cross-correlation (method CC) by APs, were compared. Time periods with positive values around the central peak in AP (PP) were measured and the contribution of MFCVs by motor unit action potentials (MUAPs) was estimated.
Results
IZs were estimated in 12 subjects. Near the IZ, correlation between MFCVs by methods P and CC was lower than in other locations; MFCV was significantly larger by method P than by method CC in the vicinity of the IZ. PP of the comparison AP was significantly larger than that of the reference AP. The distribution of the MFCVs by different MUAPs was verified by computer simulation.
Conclusions
Surface EMG was used to demonstrate the diversity of MFCVs, with some increased MFCVs, for several MUAPs in the vicinity of the IZ. This method could be applied to the evaluation of neuromuscular disorders.

Keywords: Neural Conduction - physiology, Muscle Fibers, Skeletal - physiology, Isometric Contraction - physiology, Electromyography - methods, Electrodes, Arm - physiology, Action Potentials - physiology, young adult

Add Comment 0 Comments

Editorial

01 May 2024 : Editorial  

Editorial: First Regulatory Approval for Adoptive Cell Therapy with Autologous Tumor-Infiltrating Lymphocytes (TILs) – Lifileucel (Amtagvi)

Dinah V. Parums

DOI: 10.12659/MSM.944927

Med Sci Monit 2024; 30:e944927

In Press

Database Analysis  

Long-Term Prognosis of Patients Undergoing Percutaneous Coronary Intervention: The Impact of Serum Creatini...

Med Sci Monit In Press; DOI: 10.12659/MSM.943063  

Database Analysis  

Maternal Exposure to Environmental Air Pollution and Premature Rupture of Membranes: Evidence from Southern...

Med Sci Monit In Press; DOI: 10.12659/MSM.943601  

Animal Research  

Enhanced Bone Healing Through Systemic Capsaicin Administration: An Experimental Study on Wistar Rats

Med Sci Monit In Press; DOI: 10.12659/MSM.942485  

Clinical Research  

Differential Inflammatory Responses in Adult and Pediatric COVID-19 Patients: Implications for Long-Term Co...

Med Sci Monit In Press; DOI: 10.12659/MSM.944052  

Most Viewed Current Articles

17 Jan 2024 : Review article  

Vaccination Guidelines for Pregnant Women: Addressing COVID-19 and the Omicron Variant

DOI :10.12659/MSM.942799

Med Sci Monit 2024; 30:e942799

0:00

14 Dec 2022 : Clinical Research  

Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase Levels

DOI :10.12659/MSM.937990

Med Sci Monit 2022; 28:e937990

0:00

16 May 2023 : Clinical Research  

Electrophysiological Testing for an Auditory Processing Disorder and Reading Performance in 54 School Stude...

DOI :10.12659/MSM.940387

Med Sci Monit 2023; 29:e940387

0:00

01 Jan 2022 : Editorial  

Editorial: Current Status of Oral Antiviral Drug Treatments for SARS-CoV-2 Infection in Non-Hospitalized Pa...

DOI :10.12659/MSM.935952

Med Sci Monit 2022; 28:e935952

0:00

Your Privacy

We use cookies to ensure the functionality of our website, to personalize content and advertising, to provide social media features, and to analyze our traffic. If you allow us to do so, we also inform our social media, advertising and analysis partners about your use of our website, You can decise for yourself which categories you you want to deny or allow. Please note that based on your settings not all functionalities of the site are available. View our privacy policy.

Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750