Decomposition of Compound Muscle Action Potentials by Convolution Kernel Compensation Method: Improved Segmentation of Motor Unit Firings

2020 ◽  
pp. 324-332
Author(s):  
Aleš Holobar
Keyword(s):  
Motor Unit ◽  
Action Potentials ◽  
Compensation Method ◽  
Convolution Kernel ◽  
Muscle Action ◽  
Compound Muscle Action Potentials

63. Decline of compound muscle action potentials and estimated motor unit numbers during wallerian degeneration

2008 ◽  
Vol 119 (9) ◽  
pp. e115
Author(s):  
E. Kocasoy Orhan ◽  
K. Başaran ◽  
M. Barış Baslo ◽  
V. Yayla ◽  
E. Güven ◽  
...  
Keyword(s):  
Motor Unit ◽  
Action Potentials ◽  
Wallerian Degeneration ◽  
Muscle Action ◽  
Compound Muscle Action Potentials

THO31 Decline of compound muscle action potentials and estimated motor unit numbers during Wallerian degeneration

2008 ◽  
Vol 119 ◽  
pp. S58
Author(s):  
Elif Kocasoy Orhan ◽  
Karaca Başaran ◽  
Erdem Güven ◽  
Bariş Baslo ◽  
Vildan Yayla ◽  
...  
Keyword(s):  
Motor Unit ◽  
Action Potentials ◽  
Wallerian Degeneration ◽  
Muscle Action ◽  
Compound Muscle Action Potentials

scholarly journals Effects of muscle shortening on single-fiber, motor unit, and compound muscle action potentials

2021 ◽  
Author(s):  
Javier Rodriguez-Falces ◽  
Armando Malanda ◽  
Javier Navallas
Keyword(s):  
Motor Unit ◽  
Action Potentials ◽  
Single Fiber ◽  
Electrode Position ◽  
Muscle Action ◽  
Electrode Distance ◽  
Reference Information ◽  
Compound Muscle Action Potentials ◽  
Muscle Shortening ◽  
Main Factors

AbstractEven under isometric conditions, muscle contractions are associated with some degree of fiber shortening. The effects of muscle shortening on extracellular electromyographic potentials have not been characterized in detail. Moreover, the anatomical, biophysical, and detection factors influencing the muscle-shortening effects have been neither identified nor understood completely. Herein, we investigated the effects of muscle shortening on the amplitude and duration characteristics of single-fiber, motor unit, and compound muscle action potentials. We found that, at the single-fiber level, two main factors influenced the muscle-shortening effects: (1) the electrode position and distance relative to the myotendinous zone and (2) the electrode distance to the maxima of the dipole field arising from the stationary dipole created at the fiber-tendon junction. Besides, at the motor unit and muscle level, two additional factors were involved: (3) the overlapping between the propagating component of some fibers with the non-propagating component of other fibers and (4) the spatial spreading of the fiber-tendon junctions. The muscle-shortening effects depend critically on the electrode longitudinal distance to the myotendinous zone. When the electrode was placed far from the myotendinous zone, muscle shortening resulted in an enlargement and narrowing of the final (negative) phase of the potential, and this enlargement became less pronounced as the electrode approached the fiber endings. For electrode locations close to the myotendinous zone, muscle shortening caused a depression of both the main (positive) and final (negative) phases of the potential. Beyond the myotendinous zone, muscle shortening led to a decrease of the final (positive) phase. The present results provide reference information that will help to identify changes in MUPs and M waves due to muscle shortening, and thus to differentiate these changes from those caused by muscle fatigue. Graphical abstract

Latency of compound muscle action potentials of the anal sphincter after magnetic sacral stimulation

2001 ◽  
Vol 24 (9) ◽  
pp. 1232-1235 ◽  
Author(s):  
G.L. Morren ◽  
S. Walter ◽  
H. Lindehammar ◽  
O. Hallböök ◽  
R. Sjödahl
Keyword(s):  
Anal Sphincter ◽  
Action Potentials ◽  
Muscle Action ◽  
Compound Muscle Action Potentials ◽  
Sacral Stimulation

Mapping the Compound Muscle Action Potentials of Cricothyroid Muscle Using Electromyography in Thyroid Operations

2009 ◽  
Vol 250 (2) ◽  
pp. 293-300 ◽  
Author(s):  
Ben Selvan ◽  
Srinivasa Babu ◽  
M J. Paul ◽  
Deepak Abraham ◽  
Prasanna Samuel ◽  
...  
Keyword(s):  
Action Potentials ◽  
Muscle Action ◽  
Cricothyroid Muscle ◽  
Compound Muscle Action Potentials
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