Comparison between concentric needle EMG and macro EMG in patients with a history of polio

@article{Sandberg1999ComparisonBC,
  title={Comparison between concentric needle EMG and macro EMG in patients with a history of polio},
  author={Arne Sandberg and Bj{\"o}rn Hansson and Erik St{\aa}lberg},
  journal={Clinical Neurophysiology},
  year={1999},
  volume={110},
  pages={1900-1908}
}
OBJECTIVES Acute poliomyelitis causes degeneration of anterior horn cells, followed by denervation. Reinnervation and muscle fibre hypertrophy are mechanisms that compensate this loss of neurones. Concentric needle EMG (CNEMG) and macro EMG are two methods to assess the magnitude of initial involvement and the compensatory reinnervation. The aim of this study is to explore the difference between CNEMG and macro EMG describing the status of the motor unit in patients previously affected by polio… Expand

Paper Mentions

Observational Clinical Trial
This training protocol has two objectives: 1) to train NINDS fellows in specialized techniques for diagnosing neurological disorders, and 2) to gather data from healthy volunteers… Expand
ConditionsMusculoskeletal Physiology
Concentric-needle versus macro EMG II. Detection of neuromuscular disorders
TLDR
MA-EMG has a similar sensitivity in the detection of neuromuscular disorders as CN- EMG, particularly when myopathy is suspected, and both techniques should be applied if one is unrevealing. Expand
Single fiber EMG Fiber density and its relationship to Macro EMG amplitude in reinnervation.
  • A. Sandberg
  • Mathematics, Medicine
  • Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology
  • 2014
The objective was to elucidate the relation between the Macro EMG parameters fiber density (FD) and Macro amplitude in reinnervation in the purpose to use the FD parameter as a surrogate marker forExpand
Macro electromyography and motor unit number index in the tibialis anterior muscle: Differences and similarities in characterizing motor unit properties in prior polio
TLDR
It is shown that MUNIX can be used to characterize MUs with high reproducibility, even in a large muscle, and one of the reasons for this finding may be the difference in MU populations studied with the two methods. Expand
How Long does Denervation Take in Poliomyelitis? Or is it a Lifetime?”
TLDR
It was showed that patients with a history of poliomyelitis experienced denervation with subsequent reinnervation for many years. Expand
Macro electromyography, an update
TLDR
The value of combining macro EMG with single‐fiber EMG and conventional EMG recordings is discussed and an update of findings in some nerve–muscle disorders is updated. Expand
Concentric needle EMG versus macro EMG I. Relation in healthy subjects
TLDR
CN-MUAP duration appropriately reflects the motor unit's electrical activity and may substitute MA-MU AP area and amplitude and may Substitute MA- MUAP amplitude and amplitude. Expand
Motor unit characteristics in healthy subjects and those with postpoliomyelitis syndrome: A high‐density surface EMG study
TLDR
It is concluded that with HD‐sEMG it is possible to detect neurogenic motor unit changes noninvasively, both byAnalysis of the raw signal itself and by analysis of extracted single MUAPs. Expand
The standard concentric needle cannula cannot replace the Macro EMG electrode
  • A. Sandberg
  • Medicine, Materials Science
  • Clinical Neurophysiology
  • 2014
TLDR
The uninsulated cannula of the concentric needle electrode cannot replace the standard Macro EMG electrode due to technical reasons, probably from different effects of shunting of the bare cannula in deep vs. superficially recorded motor units. Expand
Post‐poliomyelitis syndrome
TLDR
Although there is no specific treatment for PPS, an interdisciplinary management program can be useful in controlling symptoms and contributing factors may be aging, overuse, and disuse. Expand
Neurogenic changes in the upper airway of patients with obstructive sleep apnea.
TLDR
These results confirm the extent and existence of structural neural remodeling in OSA and quantify the extent of motor unit potential morphology derived from electromyographic (EMG) signals. Expand
...
1
2
...

References

SHOWING 1-10 OF 32 REFERENCES
Electrophysiology and electrodiagnosis of the post-polio motor unit.
TLDR
Electrodiagnostic studies--conventional electromyography, single fiber electromyographic studies (SFEMG), and macroelectromyography (macro-EMG)--that have provided information on the post-polio motor unit and on the possible etiology of some post-Polio syndrome symptoms are described. Expand
Postpolio muscular atrophy. Diagnostic utility of macroelectromyography.
TLDR
It is concluded that low-amplitude macro-EMG signals may be useful in the identification of muscles weakened by postpolio muscular atrophy. Expand
Scanning EMG in normal muscle and in neuromuscular disorders.
TLDR
Scanning EMG gives a new dimension to exploring the motor unit characteristics not attainable by conventional methods and provides important information towards a better understanding of concentric needle EMG. Expand
Disintegration of the motor unit in post-polio syndrome. Part I. Electrophysiological findings in patients after poliomyelitis.
TLDR
It seems that the reinnervation after acute polio is a continuing process and thus complete stabilization and integration of the motor unit cannot be achieved and chronic neurogenic changes of a similar degree were observed. Expand
An 8‐year longitudinal study of muscle strength, muscle fiber size, and dynamic electromyogram in individuals with late polio
TLDR
Evidence of on‐going denervation/reinnervation as well as of failing capacity to maintain large motor units was demonstrated in subjects with polio 24 to 51 years prior to the first examination. Expand
Morphologic changes in the muscles of patients with postpoliomyelitis neuromuscular symptoms
TLDR
It is concluded that postpolio muscle biopsies show a spectrum of morphologic changes that depend on whether the biopsied muscle was originally affected and had fully or partially recovered, and the newly weakened muscles show signs of recent denervation. Expand
Use of single fiber EMG and macro EMG in study of reinnervation
TLDR
The use of single iber EMG and macro EMG in studies of reinnervation is discussed and the capacity for reinn conservation is discussed for a few conditions as well as factors that limit the reinnoration process. Expand
Simulation of macro EMG motor unit potentials.
TLDR
In the simulations of Macro EMG the area of the signal appears to be a better measure of the strength of the motor unit than the amplitude, and therefore new aspects of the Motor unit can be quantified. Expand
Assessment of variability in the shape of the motor unit action potential, the “jiggle,” at consecutive discharges
TLDR
Simulations showed that increased jitter of the constituent single fiber potentials increases the jiggle as expressed by an increase in CAD and decrease in CCC values, which will increase the information obtainable from routine EMG investigations. Expand
Outliers, a way to detect abnormality in quantitative EMG
TLDR
The aim of the present investigation was to define limits of normal values and to compare the diagnostic yield of assessing definitely abnormal values outliers, with conventional mean values of MUP parameters, and found that outliers were as sensitive as mean values in neuropathies and better in myopathies. Expand
...
1
2
3
4
...