scholarly journals Common Peroneal Nerve Injury in a Patient with COVID-19 Infection

Bionatura ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 2043-2045
Author(s):  
Zeynab Bossaghzadeh ◽  
Firoozeh Niazvand ◽  
Medi Saneie ◽  
Shahram Rahimi-Dehgolan ◽  
Hooshan Sahariati Ghadikolaei ◽  
...  
Keyword(s):  
Virus Disease ◽  
Rare Complication ◽  
Common Peroneal Nerve ◽  
Motor Unit Action Potential ◽  
Sharp Waves ◽  
Peroneal Nerve Injury ◽  
Motor Unit Action ◽  
The Right ◽  
Unit Action ◽  
Ankle Dorsiflexor

This report described a 46-year man with the characteristic Computerized Tomography (CT) scan findings of Corona Virus Disease Infection 19 (COVID-19) who presented to the hospital with right ankle weakness three weeks after the pneumonitis. He had been initially hospitalized, complaining of fever, myalgia, cough, and dyspnea. Electromyogram (EMG) revealed obvious evidence of increased insertional activity (IA) and significant denervation potentials, including positive sharp waves (PSW) and fibrillation potentials, particularly in ankle dorsiflexor muscles. Moreover, no voluntary motor unit action potential (MUAP) was observed. Eventually, the patient was diagnosed with severe axonal mononeuropathy of the right CPN, which could be considered a rare complication of COVID-19.

scholarly journals The innervation and organization of motor units in a series-fibered human muscle: the brachioradialis

2010 ◽  
Vol 108 (6) ◽  
pp. 1530-1541 ◽  
Author(s):  
Zoia C. Lateva ◽  
Kevin C. McGill ◽  
M. Elise Johanson
Keyword(s):  
Human Subjects ◽  
Standing Waves ◽  
Motor Units ◽  
Human Muscle ◽  
Motor Unit Action Potential ◽  
Distal Muscle ◽  
Normal Human ◽  
Motor Unit Action ◽  
Unit Action ◽  
Individual Motor

We studied the innervation and organization of motor units in the brachioradialis muscle of 25 normal human subjects. We recorded intramuscular EMG signals at points separated by 15 mm along the proximodistal muscle axis during moderate isometric contractions, identified from 27 to 61 (mean 39) individual motor units per subject using EMG decomposition, and estimated the locations of the endplates and distal muscle/tendon junctions from the motor-unit action potential (MUAP) propagation patterns and terminal standing waves. In three subjects all the motor units were innervated in a single endplate zone. In the other 22 subjects, the motor units were innervated in 3–6 (mean 4) distinct endplate zones separated by 15–55 mm along the proximodistal axis. One-third of the motor units had fibers innervated in more than one zone. The more distally innervated motor units had distinct terminal waves indicating tendonous termination, while the more proximal motor units lacked terminal waves, indicating intrafascicular termination. Analysis of blocked MUAP components revealed that 19% of the motor units had at least one doubly innervated fiber, i.e., a fiber innervated in two different endplate zones by two different motoneurons, and thus belonging to two different motor units. These results are consistent with the brachioradialis muscle having a series-fibered architecture consisting of multiple, overlapping bands of muscle fibers in most individuals and a simple parallel-fibered architecture in some individuals.

scholarly journals Simulation of Motor Unit Action Potential Recordings From Intramuscular Multichannel Scanning Electrodes

2020 ◽  
Vol 67 (7) ◽  
pp. 2005-2014
Author(s):  
Akhmadeev Konstantin ◽  
Tianyi Yu ◽  
Eric Le Carpentier ◽  
Yannick Aoustin ◽  
Dario Farina
Keyword(s):  
Action Potential ◽  
Motor Unit ◽  
Motor Unit Action Potential ◽  
Motor Unit Action ◽  
Unit Action

scholarly journals Sliding window averaging for the extraction of representative waveforms from motor unit action potential trains

2016 ◽  
Vol 27 ◽  
pp. 32-43 ◽  
Author(s):  
Armando Malanda ◽  
Ignacio Rodriguez-Carreño ◽  
Javier Navallas ◽  
Javier Rodriguez-Falces ◽  
Sonia Porta ◽  
...  
Keyword(s):  
Action Potential ◽  
Motor Unit ◽  
Sliding Window ◽  
Motor Unit Action Potential ◽  
Motor Unit Action ◽  
Unit Action
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