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Determination of the motor unit behavior of lumbar erector spinae muscles through surface EMG decomposition technology in healthy female subjects
Author(s) -
Silva Mariana Felipe,
Dias Josilainne Marcelino,
Pereira Ligia Maxwell,
Mazuquin Bruno Fles,
Lindley Steven,
Richards Jim,
Cardoso Jefferson Rosa
Publication year - 2017
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.25184
Subject(s) - motor unit , electromyography , lumbar , erector spinae muscles , medicine , physical medicine and rehabilitation , motor unit recruitment , low back pain , back muscles , physical therapy , anatomy , alternative medicine , pathology
: The aims of this study were to determine the motor unit behavior of the erector spinae muscles and to assess whether differences exist between the dominant/nondominant sides of the back muscles. Methods : Nine healthy women, aged 21.7 years (SD = 0.7), performed a back extension test. Surface electromyographic decomposition data were collected from both sides of the erector spinae and decomposed into individual motor unit action potential trains. The mean firing rate for each motor unit was calculated, and a regression analysis was performed against the corresponding recruitment thresholds. Results : The mean firing rate ranged from 15.9 to 23.9 pps and 15.8 to 20.6 pps on the dominant and nondominant sides, respectively. However, the early motor unit potentials of the nondominant lumbar erector spinae muscles were recruited at a lower firing rate. Conclusions : This technique may further our understanding of individuals with back pain and other underlying neuromuscular diseases. Muscle Nerve 55 : 28–34, 2017