Turns analysis (peak ratio) in EMG using the mean amplitude as a substitute of force measurement

Cenkovich, 1982, A quantitative electromyographic index that is independent of the force of contractions, Electroenceph. clin. Neurophysiol., 54, 79, 10.1016/0013-4694(82)90234-6 Christensen, 1984, Processing of electrical activity in human muscle during a gradual increase in force, Electroenceph. clin. Neurophysiol., 58, 230, 10.1016/0013-4694(84)90109-3 Fitch, 1967, An analyser for use in human electromyography, Electron. Engng, 39, 240 Fuglsang-Frederiksen, 1975, Analysis of electrical activity of normal muscle in man at different degrees of voluntary effort, J. Neurol. Neurosurg. Psychiat., 38, 683, 10.1136/jnnp.38.7.683 Fuglsang-Frederiksen, 1976, Diagnostic yield of analysis of the pattern of electrical activity and of individual motor unit potentials in myopathy, J. Neurol. Neurosurg. Psychiat., 39, 742, 10.1136/jnnp.39.8.742 Fuglsang-Frederiksen, 1977, Diagnostic yield of the analysis of the pattern of electrical activity of muscle and of individual motor unit potentials in neurogenic involvement, J. Neurol. Neurosurg. Psychiat., 40, 544, 10.1136/jnnp.40.6.544 Fuglsang-Frederiksen, 1984, Electrical muscle activity during a gradual increase in force in patients with neuromuscular diseases, Electroenceph. clin. Neurophysiol., 57, 320, 10.1016/0013-4694(84)90154-8 Fuglsang-Frederiksen, 1985, Pattern of electrical activity and force in normal and pathological muscle: S-index of turns and amplitude, Electroenceph. clin. Neurophysiol., 60, 30, 10.1016/0013-4694(85)90947-2 Hayward, 1977, Automatic analysis of the electromyogram in patients with chronic partial denervation, J. neurol. Sci., 33, 415, 10.1016/0022-510X(77)90137-X Smyth, 1982, Quantitative electromyography in babies and young children with primary muscle disease and neurogenic lesions, J. neurol. Sci., 56, 199, 10.1016/0022-510X(82)90142-3 Stålberg, 1983, Automatic analysis of the EMG interference pattern, Electroenceph. clin. Neurophysiol., 56, 672, 10.1016/0013-4694(83)90035-4 Willison, 1964, Analysis of electrical activity in healthy and dystrophic muscle in man, J. Neurol. Neurosurg. Psychiat., 27, 386, 10.1136/jnnp.27.5.386