We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Nobody downloaded yet

Investigation of variables for monitoring muscle fatigue in EMG recordings - Essay Example

Comments (0)
Summary
Estimation of EMG Variables during Voluntary Isometric Contractions List of Symbols  Deterministic signal  Fourier Transform  Number of symbols  Energy Spectral Density xx Autocorrelation Function  Time Constant  Periodogram (Power Spectral Density) BT Blackman Turkey (Power Spectral Density)  i Signal Samples n Noise Input Sequence  ,  Past Outputs, Past Inputs  Power Spectrum  i Instantaneous Frequency  Signal’s Phase  Autoregressive Model Order Abstract: Many techniques have been developed in spectral analysis and their application in different fields including detection EMG signals…
Download full paper
GRAB THE BEST PAPER
Investigation of variables for monitoring muscle fatigue in EMG recordings
Read TextPreview

Extract of sample
Investigation of variables for monitoring muscle fatigue in EMG recordings

Download file to see previous pages... Here the assessments are based on the analysis of signals produced during the activity of the muscle; contraction or relaxation. There are many algorithms used available for estimating the amplitude, frequency variables and conduction velocity of the surface EMG signal detected during voluntary contractions. Here the most widely accepted algorithms are studied and its advantages and drawbacks are outlined. Here the focus is made on the frequency analysis of surface EMG signal. The results obtained during the frequency analysis of surface EMG signifies the behavior of test signals based on mean and median frequency variables acquired using PSD estimation methods, namely Autoregressive and Periodogram. Here an electromyograph is record the signals generated during the electrical or neurological excitation of the muscle cells and these recorded signals are then subjected to spectral analysis. The frequency responses of the signals are considered assessments are made accordingly. “Surface EMG signals are decomposed into 32-subbands by using a cosine modulated filter bank. Both the instantaneous mean frequency (IMF) and the instantaneous amplitude (IA) are estimated from the sub bands and are used as indicators of muscle fatigue” (McGoron, et al, 2009, P. 267). Table of Contents 1. Introduction 7 1.1. Power spectral density (PSD) 7 1.2. Spectrum estimation techniques 8 1.2.1. Fast Fourier transforms 9 1.2.2. Blackman turkey approach 10 1.2.3. Autoregressive method 11 1.2.4. Auto regressive moving average model 12 1.3 EMG 13 1.4. Application of PSD in EMG 13 2. Literature on Application 14 3. Discussion 17 3.1 deterministic function 18 3.2. Stochastic function 18 3.3 induction of autoregressive approach 19 4. Results 31 4.1. Deterministic 31 4.1.1. Test signal 1 31 4.1.2 Test signal 2 37 4.2. Stochastic 46 4.2.1. Test signal 4 46 4.2.2 Test signal 5 53 4.2.3 Test signal 6 57 5. Advantages of EMG and PSD 63 5. Conclusion 64 1. Introduction: At the present era medical literature considers human muscle fatigue as a physical phenomenon that starts during the onset of a muscle contraction and develops progressively until the muscle cannot generate force, the maximum voluntary contraction (MVC) reduces during muscle fatigue. Here spectral analysis is used to examine the nature of signals recorded in the electromyograph due the electrical activity of the muscle fibers. 1.1 power spectral density (PSD): Power spectral density (PSD) is the frequency response of a random or periodic signal and indicates where power is distributed as a function of frequency. PSD is deterministic and for certain types of random signals independent of time. It shows the strength and weakness of the signals at different frequency levels. The frequency level of the signal is drawn against time to get the spectra. Waveform can be represented by a plot of amplitude versus frequency together with a plot of phase versus frequency, respectively known as the amplitude and phase spectra. Amplitude and phase ...Download file to see next pagesRead More
Comments (0)
Click to create a comment
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Fatigue
Fatigue failure occurs through the propagation of microcracks due to repeated cyclical stresses. This type of failure is not characterised by the same visible signs as static failure; there is neither buckling nor deflection, and the internal cracks that lead to fatigue failure are not always visible to the naked eye.
9 Pages(2250 words)Essay
Impact of Muscle Fatique to Sport Performance
This paper shall discuss the impact of muscle fatigue on sports performance. It shall also discuss two methods on quantifying the level of muscle fatigue. Body Muscle and fatigue impact significantly on sports performance because tired and fatigued muscles cannot efficiently store and dispense energy; and it is not capable of protecting the bones “against overloading by heel strike-initiated shock waves” (Zatsiorsky, 2000, p.
3 Pages(750 words)Essay
Muscle Strain and Repair
Posture such as sitting and standing is maintained as a result of muscle contraction. The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. The muscle fibers are the basic contractile units of skeletal muscles.
8 Pages(2000 words)Essay
Muscle movement
The skeletal muscles also known as the striated muscles work in conjunction with the bones to impart movement to the body. They do so by alternate contraction and relaxation. Bones provide the points of
3 Pages(750 words)Essay
Compassion fatigue
The condition is characterised by the reduction in a person’s level of compassion, gradually, over time. The disorder commonly affects traumatised people and people who handle victims suffering from trauma (Beaton & Murphy, 1995). The
2 Pages(500 words)Essay
Variables
Consider, for example, the variable height and age in both boys and girls. One can predict that the older child is always taller than the young one. There exist two
1 Pages(250 words)Essay
Monitoring
If the employer does not communicate such policies to the employee, then they have no right to monitor the internet usage of the employees. However, in most states, employers do not have an
1 Pages(250 words)Essay
Muscle Dysmorphia
The primary audience for the proposed program will be youths of both genders at the Gym facility at the university of Florida. The disorder normally affects adolescents, and the mean age of occurrence has been stipulated to be 20 year. The audience for the program will
1 Pages(250 words)Essay
Compassion Fatigue in
In this study, the statistical test that was put into use in order to answer the research question was the use of a survey. Survey studies are investigations in which self-report data are collected from samples with the purpose of
1 Pages(250 words)Essay
Compassion Fatigue
It is such emotional, physical, and spiritual depletion that Eric Gentry, a traumatologist, term as compassion fatigue (Showalter). Professionals in the intensive care units are prone to compassion fatigue. For
1 Pages(250 words)Essay
Let us find you another Essay on topic Investigation of variables for monitoring muscle fatigue in EMG recordings for FREE!
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us