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  • Title: Sources of error in the spike-triggered averaging method of motor unit number estimation (MUNE).
    Author: Bromberg MB, Abrams JL.
    Journal: Muscle Nerve; 1995 Oct; 18(10):1139-46. PubMed ID: 7659108.
    Abstract:
    Motor unit number estimation (MUNE) is an electrophysical technique to estimate the number of motor units innervating a muscle or muscle group. MUNE may be useful as a measure of progression of lower motor neuron loss in amyotrophic lateral sclerosis (ALS). Several methods of MUNE have been developed. The spike-triggered averaging method can be readily performed on EMG machines with signal averaging capabilities and is suitable for estimating the number of motor neurons innervating proximal muscles. We have used MUNE as a measure of disease state in a drug efficacy trial for ALS. From our experience with this method we have identified sources of error which can affect MUNE accuracy. We have investigated these sources and report their effect on MUNE.
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