Decomposition-based quantitative electromyography: Methods and initial normative data in five muscles

Quantitative electromyographic (EMG) techniques provide clinically useful information to aid in the diagnosis and follow the course or response to treatment of diseases affecting the motor system. The purpose of this study was to describe a decomposition‐based quantitative electromyography method (D...

Full description

Saved in:
Bibliographic Details
Published in:Muscle & nerve 2003-08, Vol.28 (2), p.204-211
Main Authors: Doherty, Timothy J., Stashuk, Daniel W.
Format: Article
Language:English
Subjects:
Adult
Algorithms
Arm - physiology
Biological and medical sciences
decomposition
electromyography
Electromyography - standards
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
motor unit
Muscle, Skeletal - cytology
Muscle, Skeletal - innervation
Muscle, Skeletal - physiology
quantitative electromyography
Reference Values
Striated muscle. Tendons
Vertebrates: osteoarticular system, musculoskeletal system
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Quantitative electromyographic (EMG) techniques provide clinically useful information to aid in the diagnosis and follow the course or response to treatment of diseases affecting the motor system. The purpose of this study was to describe a decomposition‐based quantitative electromyography method (DQEMG) designed to obtain clinically applicable information relating to motor unit potential (MUP) size and configuration, and motor unit (MU) firing characteristics. Additionally, preliminary normative data were obtained from the deltoid, biceps brachii, first dorsal interosseous, vastus medialis, and tibialis anterior muscles of 13 control subjects. DQEMG was capable of efficiently and accurately extracting MUP data from complex interference patterns during mild to moderate contractions. MUP amplitude, surface‐detected MUP (S‐MUP) amplitude, MUP duration, number of phases, and MU firing frequencies varied significantly across muscles. The mean parameter values for the individual muscles studied were similar to previous reports based on other quantitative methods. The main advantages of this method are the speed of data acquisition and processing, the ability to obtain MUPs from MUs with low and higher recruitment thresholds, and the ability to obtain both S‐MUP or macro‐MUP data as well as MU firing rate information. Muscle Nerve 28: 204–211, 2003
ISSN:0148-639X
1097-4598
DOI:10.1002/mus.10427