Modified motor unit number index (MUNIX) algorithm for assessing excitability of alpha motor neuron in spasticity

Uslu, Serkan; Nüzket, Tunca; Uysal, Hilmi

doi:10.1016/j.cnp.2018.05.002

Cited by 7 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In another study done by Serkan Uslu et al (2016) has concluded that the relationship between tendon tapping force and ordinal DTR grading was difficult to establish. 31 Our study also could not able to find the association between tendon tapping force and desired PTR variables. The mass of the hammer (200 g) was constant throughout the study which may not be a confounding factor.…”

Section: Discussioncontrasting

confidence: 57%

Characterization of the patellar tendon reflex response using an indigenously developed system and implementation of a strategic protocol to assess its clinical usefulness

Kareem

Dilara

Maruthy

et al. 2021

Clinical Epidemiology and Global Health

View full text Add to dashboard Cite

Introduction: Deep tendon reflex evaluation is a part of the neurological examination and a wide variety of neurological and neuromuscular disorders manifest alterations in deep tendon reflex responses. Conventional methods to assess tendon reflexes in clinical practice are subjective and provide categorical data that might not be adequate in the interpretation. Hence, a quantitative tool is warranted to provide an objective outcome of tendon reflex assessment. The goal of this work was to use an indigenously designed method to characterize the tendon reflex responses. Materials & methods: A cross-sectional study was undertaken in 40 healthy subjects aged between 20 and 45years. Assessment of the tendon reflex was performed using wearable biosensors to characterize it into quantitative variables. A strategic protocol was followed to test the accuracy and repeatability of the outcome. Results: Analysis of phase -I results of the subjective assessment showed high interrater variability and significant bilateral PTR test variability. Whereas the results of the objective assessment showed that the bilateral PTR test variability is minimal by both the assessors. However, the results of all quantified PTR test variables showed an insignificant inter-observer variability except for T 1, TTE and PEAD (p < 0.05*). Conclusion:The findings of this study suggest that quantified tendon reflex using wearable biosensors could provide a piece of valuable information during neurological examination in clinical settings. The proposed tendon reflex quantification tool is noninvasive, portable and inexpensive that can be used for field studies in different clinical conditions.

show abstract

Section: Discussioncontrasting

confidence: 57%

Characterization of the patellar tendon reflex response using an indigenously developed system and implementation of a strategic protocol to assess its clinical usefulness

Kareem

Dilara

Maruthy

et al. 2021

Clinical Epidemiology and Global Health

View full text Add to dashboard Cite

show abstract

“…High density surface EMG can recover information on MU recruitment [18,19], but the recording system is cumbersome, and data storing and processing are intensive. As a result, few EMG channels are preferred in many applied fields, such as sport [40], gait analysis [41], ergonomic assessments [42], diagnosis [31,43], myoelectric control [44]. It is then important to be able to extract more information from single channel recordings, going beyond basic analysis, such as the estimation of activity intervals or amplitude and spectral indexes.…”

Section: Discussionmentioning

confidence: 99%

Motor Unit Discharges from Multi-Kernel Deconvolution of Single Channel Surface Electromyogram

Mesin¹

2021

Electronics

View full text Add to dashboard Cite

Surface electromyogram (EMG) finds many applications in the non-invasive characterization of muscles. Extracting information on the control of motor units (MU) is difficult when using single channels, e.g., due to the low selectivity and large phase cancellations of MU action potentials (MUAPs). In this paper, we propose a new method to face this problem in the case of a single differential channel. The signal is approximated as a sum of convolutions of different kernels (adapted to the signal) and firing patterns, whose sum is the estimation of the cumulative MU firings. Three simulators were used for testing: muscles of parallel fibres with either two innervation zones (IZs, thus, with MUAPs of different phases) or one IZ and a model with fibres inclined with respect to the skin. Simulations were prepared for different fat thicknesses, distributions of conduction velocity, maximal firing rates, synchronizations of MU discharges, and variability of the inter-spike interval. The performances were measured in terms of cross-correlations of the estimated and simulated cumulative MU firings in the range of 0–50 Hz and compared with those of a state-of-the-art single-kernel algorithm. The median cross-correlations for multi-kernel/single-kernel approaches were 92.2%/82.4%, 98.1%/97.6%, and 95.0%/91.0% for the models with two IZs, one IZ (parallel fibres), and inclined fibres, respectively (all statistically significant differences, which were larger when the MUAP shapes were of greater difference).

show abstract

Amplitude and velocity dependence of patellar pendulum triggered by T reflex in Parkinson’s rigidity

et al. 2020

View full text Add to dashboard Cite

Modified motor unit number index (MUNIX) algorithm for assessing excitability of alpha motor neuron in spasticity

Cited by 7 publications

References 33 publications

Characterization of the patellar tendon reflex response using an indigenously developed system and implementation of a strategic protocol to assess its clinical usefulness

Characterization of the patellar tendon reflex response using an indigenously developed system and implementation of a strategic protocol to assess its clinical usefulness

Motor Unit Discharges from Multi-Kernel Deconvolution of Single Channel Surface Electromyogram

Amplitude and velocity dependence of patellar pendulum triggered by T reflex in Parkinson’s rigidity

Contact Info

Product

Resources

About