EMG IEEE 
ELECTROMYOGRAPHY (EMG)
Roshna S
Department of Electronics and Communication, 8th SEM
CMR Institute of Technology
AECS layout, ITPL road, Bangalore, India
Abstract – Electromyography (EMG) is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons). Motor neurons transmit electrical signals that cause muscles to contract. An EMG translates these signals into graphs, sounds or numerical values that a specialist interprets. It is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG results can reveal nerve dysfunction, muscle dysfunction or problems with nerve-to-muscle signal transmission. Careful registration and study of electrical signals in muscles (electromyograms) can thus be a valuable aid in discovering and diagnosing abnormalities not only in the muscles but also in the motor system as a whole.
Keywords – Electromyography, Motor neurons, electrical signals,
Muscle dysfunction, diagnosing
I. INTRODUCTION
Electromyography (EMG), the recording of electrical activity in muscle, should be regarded as an extension of the clinical examination. It can distinguish myopathic from neurogenic muscle wasting and weakness. It can detect abnormalities such as chronic denervation or fasciculations in clinically normal muscle. It can, by determining the distribution of neurogenic abnormalities, differentiate focal nerve, plexus, or radicular pathology; and it can provide supportive evidence of the pathophysiology of peripheral neuropathy, either axonal degeneration or demyelination. EMG is an obligatory investigation in motor neurone disease to demonstrate the widespread denervation and fasciculation required for secure diagnosis.
II. PRINCIPLE OF ELECTROMYOGRAPHY
Movement and position of limbs are controlled by electrical signals traveling back and forth between the muscles and the peripheral and central nervous system. When pathologic conditions arise in the
Roshna S
Department of Electronics and Communication, 8th SEM
CMR Institute of Technology
AECS layout, ITPL road, Bangalore, India
Abstract – Electromyography (EMG) is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons). Motor neurons transmit electrical signals that cause muscles to contract. An EMG translates these signals into graphs, sounds or numerical values that a specialist interprets. It is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG results can reveal nerve dysfunction, muscle dysfunction or problems with nerve-to-muscle signal transmission. Careful registration and study of electrical signals in muscles (electromyograms) can thus be a valuable aid in discovering and diagnosing abnormalities not only in the muscles but also in the motor system as a whole.
Keywords – Electromyography, Motor neurons, electrical signals,
Muscle dysfunction, diagnosing
I. INTRODUCTION
Electromyography (EMG), the recording of electrical activity in muscle, should be regarded as an extension of the clinical examination. It can distinguish myopathic from neurogenic muscle wasting and weakness. It can detect abnormalities such as chronic denervation or fasciculations in clinically normal muscle. It can, by determining the distribution of neurogenic abnormalities, differentiate focal nerve, plexus, or radicular pathology; and it can provide supportive evidence of the pathophysiology of peripheral neuropathy, either axonal degeneration or demyelination. EMG is an obligatory investigation in motor neurone disease to demonstrate the widespread denervation and fasciculation required for secure diagnosis.
II. PRINCIPLE OF ELECTROMYOGRAPHY
Movement and position of limbs are controlled by electrical signals traveling back and forth between the muscles and the peripheral and central nervous system. When pathologic conditions arise in the
References: [1] Basmajian JV, De Luca CJ (1985) Muscles Alive. Their Function Revealed by Electromyography. Williams & Wilkens, Baltimore. [2] Aminoff, MJ. Electromyography in clinical practice. 3rd ed. New York, Churchill Livingstone, 1997:1–630. [3] Kimura J. 1981. Electrodiagnosis in Diseases of Nerve and Muscle: Principles and Practice. Philadelphia, FA Davis. [4] Lapatki, B. G., Stegeman, D. F., and Jonas, I. E., "A surface EMG electrode for the simultaneous observation of multiple facial muscles," Journal of Neuroscience Methods, 123(2): 117-128, 2003 [5] Fridlund AJ and Cacioppo JT, "Guidelines for human electromyographic research," Psychophysiology, 23(5): 567-589, 1986. [6] Cole KJ, KO, Packi RA, AB, and JH, "A miniature electrode for surface electromyography during speech," J Acoust Soc Am, 74: 1362-1366, 1983. [7] J.R.Cram; G. Kasman. Introduction to Surface Electromyography Aspen 1998, ISBN 0-8342-0751-6.