Activity patterns of wrist extensor muscles during wrist extensions and deviations

2004 ◽  
Vol 31 (2) ◽  
pp. 242-251 ◽  
Author(s):  
L. Finsen ◽  
K. Søgaard ◽  
T. Graven-Nielsen ◽  
H. Christensen
Keyword(s):  
Activity Patterns ◽  
Wrist Extensor ◽  
Extensor Muscles ◽  
Wrist Extensor Muscles

EXTERNAL EXTENSION FORCE REDUCES ELECTROMYOGRAPHIC ACTIVITY OF THE WRIST EXTENSOR MUSCLES DURING GRIPPING

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S318
Author(s):  
N van Elk ◽  
J G.M. Kooloos ◽  
M Massa ◽  
J A. de Lint ◽  
M T.E. Hopman
Keyword(s):  
Electromyographic Activity ◽  
Wrist Extensor ◽  
Extensor Muscles ◽  
Wrist Extensor Muscles ◽  
Extension Force

scholarly journals Comparison of the electrical activity in upper trapezius and wrist extensor muscles during two typewriting conditions

2014 ◽  
Vol 27 (2) ◽  
pp. 271-279 ◽  
Author(s):  
João Carlos Comel ◽  
João Pedro Batista Junior ◽  
Eliana Paula Chini ◽  
Hugo Maxwell Pereira ◽  
Rodrigo Luiz Carregaro ◽  
...  
Keyword(s):  
Electrical Activity ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Electromyographic Activity ◽  
Wrist Extensor ◽  
Upper Trapezius ◽  
Extensor Muscles ◽  
Significant Difference ◽  
Arm Support ◽  
Wrist Extensor Muscles

Introduction The proper use of the position of the arm and wrist while typing may reduce muscle overload and prevent musculoskeletal disorders.Objective To evaluate the electromyographic activity of upper trapezius and wrist extensor muscles during two typewriting conditions.Materials and methods : Six healthy females (Xage = 42 years,SD= 10), (Xheight = 1.65m, SD = 0.05) and (Xweight = 71kg, SD = 16) participated in this study. The task was performed with a newly developed arm support and without the support. A perceived exertion scale was used with all subjects. An ANOVA with repeated measures was used to verify differences in perceived exertion and root mean square (RMS).Results There were no statistically significant differences for the RMS between the typewriting tasks. The condition without arm support presented a significantly greater mean velocity and amount of words typed (P= 0.02; P= 0.03) and there was a significant difference in perceived exertion during the condition without arm support (P= 0.03). Electromyographic activity did not present differences.Conclusion The muscle electrical activity was not altered regardless the arm support and occurred the improvement of the perceived exertion after 10 minutes of typing without support. Long-term studies are needed.

scholarly journals Carry-over effect in integrated volitional control electrical stimulation of wrist extensor muscles for stroke patients

Nosotchu ◽  
2013 ◽  
Vol 35 (3) ◽  
pp. 174-180
Author(s):  
Chieko Usami ◽  
Hiroyuki Miyasaka ◽  
Hitomi Uematsu ◽  
Izumi Kondo ◽  
Yutaka Tomita ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Stroke Patients ◽  
Volitional Control ◽  
Wrist Extensor ◽  
Extensor Muscles ◽  
Wrist Extensor Muscles ◽  
Carry Over ◽  
Stimulation Of ◽  
Carry Over Effect

Photobiomodulation Decreases Fatigue of the Wrist Extensors: Electromyographic and Dynamometric Analysis

2020 ◽  
Vol 12 (4) ◽  
pp. 535-541
Author(s):  
Vitor Souza ◽  
Rinaldo Guirro ◽  
Heloyse Kuriki ◽  
Gabriela de Carvalho ◽  
Alexandre Marcolino ◽  
...  
Keyword(s):  
Grip Strength ◽  
Low Level Laser Therapy ◽  
Control Group ◽  
Median Frequency ◽  
Fatigue Protocol ◽  
Wrist Extensor ◽  
Level Laser ◽  
Extensor Muscles ◽  
Wrist Extensor Muscles ◽  
Laser Group

This study analyzed the effects of photobiomodulation, on wrist extensor muscles when applied before a fatigue protocol. Twenty-eight men participated in a crossover, blinded, and controlled trial. Subjects performed grip dynamometry associated with superficial electromyography of the extensor carpi radialis, extensor carpi ulnaris, and flexor digitorum superficialis, which was used to evaluate muscle recruitment pattern by median frequency. The initial assessment was performed with a onerepetition maximum test. Twenty-four hours later the allocation was performed in two moments, and randomization was initially performed with 28 volunteers, divided between the two groups: control group, and the Low-Level Laser Therapy (30 mW, 0.06 cm2, 20 J/cm2, 1.2 J per point, and total energy of 10.8 J). Median frequency demonstrated Extensor Carpi Ulnaris fatigue in the control group as well as when compared after the fatigue protocol in the laser group. Exhaustion time was greater in the laser group and the fatigue protocol was effective at decreasing grip strength, with significant difference in the control group (p < 0.05). After the fatigue protocol, Low-Level Laser Therapy was effective in maintaining grip strength to increase exhaustion time and does not promote alterations in Median Frequency behavior at wrist extensor muscles.

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