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Concentric needle jitter on voluntary activated frontalis in 20 healthy subjects

Corresponding Author

João A. Kouyoumdjian MD, PhD

Faculdade de Medicina de São José do Rio Preto (FAMERP), Department of Neurological Sciences, Rua Luiz Antônio da Silveira 1661, 15025-020 São José do Rio Preto, São Paulo, Brazil

Faculdade de Medicina de São José do Rio Preto, Rua Luiz Antônio da Silveira 1661, 15025-020 São José do Rio Preto, São Paulo, Brazil. E-mail: [email protected]Search for more papers by this author

Erik V. Stålberg MD, PhD,

Erik V. Stålberg MD, PhD

Department of Clinical Neurophysiology, University Hospital, Institute of Neuroscience Uppsala University, Uppsala, Sweden

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João A. Kouyoumdjian MD, PhD,

Corresponding Author

João A. Kouyoumdjian MD, PhD

Faculdade de Medicina de São José do Rio Preto (FAMERP), Department of Neurological Sciences, Rua Luiz Antônio da Silveira 1661, 15025-020 São José do Rio Preto, São Paulo, Brazil

Erik V. Stålberg MD, PhD,

Erik V. Stålberg MD, PhD

Department of Clinical Neurophysiology, University Hospital, Institute of Neuroscience Uppsala University, Uppsala, Sweden

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First published: 08 November 2012

https://doi.org/10.1002/mus.23710

Citations: 14

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Abstract

Introduction: Normative data for jitter parameters using a disposable concentric needle have been described in a few studies. Methods: Jitter, expressed as the mean consecutive difference (MCD), was measured in the frontalis muscle in 20 subjects by voluntary contraction. Results: Mean MCD for individual studies (20, Gaussian), all potentials (400, non-Gaussian), and 18th highest value (20, Gaussian) were 19.9 ± 2.9 μs, 19.9 ± 6.6 μs, and 26.9 ± 4.4 μs, respectively. Conclusion: The suggested upper normal limit for mean MCD is 26 μs and for outliers is 36 μs. Muscle Nerve 47:440-442, 2013

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Volume47, Issue3

March 2013

Pages 440-442

Concentric needle jitter on voluntary activated frontalis in 20 healthy subjects

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Concentric needle jitter on voluntary activated frontalis in 20 healthy subjects

Abstract

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