A message from the ground electrode

Robinson, Lawrence R.; Christie, Michael; Nandedkar, Sanjeev D.

doi:10.1002/mus.25419

Cited by 19 publications

(14 citation statements)

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“…The compound motor action potential (CMAP) is the recording of the composite discharges of evoked muscle fiber membrane action potentials of a muscle. It is registered by 3 surface electrodes (active or E1, reference or E2, and ground or E0) connected to differential amplifiers that display the voltage at E1–E0 minus the voltage at E2–E0 . E1 captures a near‐field potential generated by the closest depolarizing muscle fibers.…”

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Optimal E2 (reference) electrode placement in fibular motor nerve conduction studies recording from the tibialis anterior muscle

et al. 2018

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elucidate a definitive time frame in which recovery was obtained. In addition, the scope of analysis was limited because of the small sample and lack of controls. However, the time of recovery was similar to that in a previous EMG outcome study. 3 This report describes EMG findings of recovery after decompression of paralabral cysts at the suprascapular or spinoglenoid notch with arthroscopy or ultrasound-guided aspiration. Our results show that neurophysiological findings of nerve entrapment normalized after decompression. Long-term studies with more patients and follow-ups are required to determine time to recovery.We thank Nicole Hurwitz, BS, and Jennifer Cheng, PhD, for their assistance with the manuscript preparation process.Ethical Publication Statement: We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this report is consistent with those guidelines. 2. Fehrman DA, Orwin JF, Jennings RM. Suprascapular nerve entrapment by ganglion cysts: a report of 6 cases with arthroscopic findings and review of the literature. Arthroscopy 1995;11 (6):727-734. 3. Feinberg JH, Nguyen ET, Boachie-Adjei K, Gribbin C, Lee SK, Daluiski A, et al. The electrodiagnostic natural history of Parsonage-Turner syndrome. Muscle Nerve 2017;56(4):737-743. 4. Ferretti A, De Carli A, Fontana M. Injury of the suprascapular nerve at the spinoglenoid notch. The natural history of infraspinatus atrophy in volleyball players. Am J Sports Med 1998;26(6):759-763. 5. Zehetgruber H, Noske H, Lang T, Wurnig C. Suprascapular nerve entrapment. A meta-analysis. Int Orthop 2002;26(6):339-343. 6. Arriaza R, Ballesteros J, Lopez-Vidriero E. Suprascapular neuropathy as a cause of swimmer's shoulder: results after arthroscopic treatment in 4 patients. Am J Sports Med 2013;41(4):887-893. 7. Shah AA, Butler RB, Sung SY, Wells JH, Higgins LD, Warner JJ. Clinical outcomes of suprascapular nerve decompression. J Shoulder Elbow Surg 2011;20(6):975-982. 8. Krarup C, Boeckstyns M, Ibsen A, Moldovan M, Archibald S. Remodeling of motor units after nerve regeneration studied by quantitative electromyography. Clin Neurophysiol 2016;127(2):1675-1682. 9. Hill LJ, Jelsing EJ, Terry MJ, Strommen JA. Evaluation, treatment, and outcomes of suprascapular neuropathy: a 5-year review. PM R 2014; 6(9):774-780. 10. Westerheide KJ, Dopirak RM, Karzel RP, Snyder SJ. Suprascapular nerve palsy secondary to spinoglenoid cysts: results of arthroscopic treatment. Arthroscopy 2006;22(7):721-727. 11. Lafosse L, Tomasi A, Corbett S, Baier G, Willems K, Gobezie R. Arthroscopic release of suprascapular nerve entrapment at the suprascapular notch: technique and preliminary results. Arthroscopy 2007;23(1):34-42. 12. Fernandes MR, Fernandes RJ. Indirect arthroscopic decompression of spinoglenoid cyst with suprascapular neuropathy: report of two cases and literature review. Rev Bras Ortop 2010;45(3):306-311.Additional supporting information may be found in the online version of this article.

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Optimal E2 (reference) electrode placement in fibular motor nerve conduction studies recording from the tibialis anterior muscle

et al. 2018

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“…The ground electrode does not actually serve to direct stray charges away from the body, as is often taught. It is merely a reference point for the active and reference electrodes …”

Section: Discussionmentioning

confidence: 99%

“…It is merely a reference point for the active and reference electrodes. 11 Many individuals with central venous catheters are critically ill and require intensive medical care. A notable limitation of this study is that these patients and those with pre-existing cardiac arrhythmia were excluded.…”

Section: Discussionmentioning

confidence: 99%

Nerve conduction studies are safe in patients with central venous catheters

et al. 2017

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“…Vor der Stimulation wird zusätzlich eine Erdung am zu Untersuchenden angebracht. Anders als gelegentlich zu hören, dient diese keineswegs der Sicherheit während der Stimulation sondern ausschließlich der Artefaktvermeidung [4].…”

Section: Stimulationunclassified

Neurografie ist mehr als die Nervenleitgeschwindigkeit

Lieba‐Samal

2017

Klin Neurophysiol

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ZusammenfassungIm deutschen Sprachgebrauch wird „Nervenleitgeschwindigkeitsuntersuchung“ oder überhaupt nur „das NLG“ häufig synonym verwendet für die Neurografie. Der Artikel ruft in Erinnerung, dass die berühmte NLG zwar eine wichtige Größe ist, aber bei weitem nicht die einzige, die es im Rahmen dieser Untersuchung zu beurteilen gilt. Für jede Messgröße der Neurografie wird die mögliche Aussagekraft sowie die Grenzen der Methodik beleuchtet und im Zusammenhang mit existierender Literatur besprochen.

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A message from the ground electrode

Cited by 19 publications

References 0 publications

Optimal E2 (reference) electrode placement in fibular motor nerve conduction studies recording from the tibialis anterior muscle

Optimal E2 (reference) electrode placement in fibular motor nerve conduction studies recording from the tibialis anterior muscle

Nerve conduction studies are safe in patients with central venous catheters

Neurografie ist mehr als die Nervenleitgeschwindigkeit

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