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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

EMG of upper trapezius - Electrode sites and association with clavicular kinematics

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Author(s):
Zanca, Gisele Garcia [1] ; Oliveira, Ana Beatriz [1] ; Ansanello, Walter [1] ; Barros, Fernanda Cabegi [1] ; Mattiello, Stela Marcia [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Phys Therapy, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY; v. 24, n. 6, p. 868-874, DEC 2014.
Web of Science Citations: 8
Abstract

The upper trapezius (UT) has been widely studied and related to alterations in clavicular kinematics in subject with shoulder disorders. However, the most common electrode site used to capture UT EMG is between C7 and the acromion, placing the electrodes over the acromial fibers rather than clavicular ones. Therefore, this study aimed to investigate the relationship between clavicular movements (elevation and retraction) and UT EMG recorded from three electrode sites (traditional electrode positioning and two different sites proposed for clavicular fibers evaluation). Furthermore, the position associated with the highest EMG during maximal isometric voluntary contractions (MVIC), for each electrode site, was determined for normalization purposes. EMG was simultaneously captured in the three electrode sites of 20 healthy subjects, during MVIC at five different positions and during shoulder elevation and abduction in scapular plane. Clavicular kinematics was recorded using an electromagnetic tracking system during the dynamic contractions. Shoulder abduction with head rotation and lateral flexion elicited the highest EMG amplitude on the three electrode sites and was used to normalize the signals. A cross-correlation analysis showed high correlations between all electrode sites and clavicular movements. However, the traditional electrode site seems to record more informative signals in healthy subjects. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/05146-0 - Effects of Kinesio Taping on scapular kinematics and shoulder propriocepton following muscle fatigue
Grantee:Gisele Garcia Zanca
Support type: Scholarships in Brazil - Doctorate