Motor Unit Number Estimation, Volume 55

1st Edition

Supplement to Clinical Neurophysiology Series, Volume 55

Print ISBN: 9780444507235
eBook ISBN: 9780444529176
Imprint: Elsevier
Published Date: 13th May 2003
Page Count: 362


MUNE is a non-invasive, electrophysiologic method to estimate the number of motor neurons innervating a muscle or group of muscles. The ability to quantitatively estimate the number of surviving motor neurons is useful in the following areas: (a) clinically for diagnosis of neuromuscular disorders; (b) as an endpoint measure in clinical drug trials for lower motor neuron disorders; and (c) as a tool to obtain insight into the natural history and pathophysiology of lower motor neuron disorders. Relevant lower motor neuron disorders include amyotrophic lateral sclerosis (ALS), spinal muscular atrophy and Charcot-Marie-Tooth inherited neuropathies. To date, there has been no formal meeting of investigators working in the field of MUNE. The symposium is designed to: (a) review and discuss the methods, advantages and disadvantages of each MUNE technique; (b) review previous applications of MUNE in research and clinical trials; (c) formulate plans for further studies to clarify issues that affect the accuracy and utility of MUNE. The symposium and workshop included an international roster of approximately 20 invited speakers who presented formal talks on the methods, assumptions, techniques and applications. Presentations by representatives from EMG equipment manufacturers were given. Each talk was followed by a discussion session, and groups of talks by a panel discussion. This publication is meant to serve as a manual for the theory and practice of MUNE. Currently, there is no book addressing MUNE.

Table of Contents

Section I. Special Lecture.

1. Review of MUNE over 30 years (R. Sica, A. McComas). Discussion after Section I.

Section II. MUNE Physiology.

2. Axon excitability in motor unit number estimation (T.J. Doherty, D.W. Stashuk, W.F. Brown). 3. Issues in motor unit number estimation (M.P. Slawnych). Discussion after Section II.

Section III. Stimulation MUNE Techniques.

4. Multiple point stimulation and F-response MUNE techniques (T.J. Doherty, D.W. Stashuk, W.F. Brown). 5. Adapted multiple point stimulation MUNE technique (F.C. Wang, O. Bouquiaux et al. ). 6. MUNE by intraneural microstimulation and the effects of averaging of unitary muscle action potentials (K. Arasaki). 7. MUNE by statistical analysis (J.R. Daube). 8. Multiple point stimulation MUNE with integrated single motor unit tracking (C.L. Gooch, P. Kaufmann). 9. Statistical MUNE in larger muscles (C.L. Gooch, W. Trojaborg). 10. Comparison of statistical and multiple point stimulation MUNE techniques (C. Lomen-Hoerth, R.K. Olney). Discussion after Section III.

Section IV. Voluntary MUNE Techniques.

11. Spike triggered averaging MUNE technique (M.B. Bromberg). 12. MUNE using decomposition-enhanced spike triggered averaging (D.W. Stashuk, T.J. Doherty, W.F. Brown). 13. Rectified integrated EMG and MUNE (J.H. Petajan). 14. Motor unit number index (MUNIX): a pilot study (S.D. Nandedkar, D.S. Nandedkar et al. ). Discussion after Section IV.

Section V. MUNE in Normal Subjects.

15. Establishing normal MUNE values (V.H. Lawson). 16. Are motor and sensory responses and MUNE values inherited traits? (C. Lomen-Hoerth, R.K. Olney). 17. MUNE measurement of age-related changes (T.J. Doherty, D.W. Stashuk, W.F. Brown). Discussion after Section V.

Section VI. MUNE in Disease States.

18. MUNE in ALS: natural history and implications (J.


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