Needle EMG of the human diaphragm: Power spectral analysis in normal subjects

Chen, Robert; Collins, Stephen; Remtulla, Hussein; Parkes, Anthony; Bolton, Charles F.

doi:10.1002/(sici)1097-4598(199603)19:3<324::aid-mus7>3.0.co;2-f

Cited by 28 publications

(19 citation statements)

References 22 publications

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“…Although these studies have become established in a number of skeletal muscles,1, 13 they have not yet been utilized in the diaphragm. Until now, only a quantitative EMG analysis of the interference pattern, and a normative study using power spectrum analysis,9 have been published for this muscle 7. However, akin to our observations in another muscle,13 interference pattern analysis did not reveal high sensitivity in the diaphragm 11.…”

supporting

confidence: 47%

Quantitative motor unit potential analysis in the diaphragm: A normative study

Podnar

Resman‐Gašperšič

2008

Muscle and Nerve

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Although quantitative motor unit potential (MUP) analysis has an established role in other skeletal muscles, it has not been performed in the diaphragm. The aim of the present study was to test whether such studies are possible and to establish normative data. Twenty-nine healthy volunteers (15 men), aged 21-65 years (median, 33 years), were studied using standard concentric needle electrodes, and equipment with the facility for template-operated multi-MUP analysis. Needle electrodes were inserted into the right medial recess of the seventh to ninth intercostal spaces. During MUP sampling, subjects were asked to hold their breath in partial inspiration for 5 s. At least 20 MUPs were obtained in 28 subjects. Diaphragmatic MUPs were confirmed to be much smaller than those of limb muscles. We found diaphragmatic quantitative MUP analysis to be possible in healthy volunteers. However, further studies in patient groups are needed to establish the feasibility and clinical value of such studies.

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supporting

confidence: 47%

Quantitative motor unit potential analysis in the diaphragm: A normative study

Podnar

Resman‐Gašperšič

2008

Muscle and Nerve

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“…Initially, rEMG was used in research settings (Strohl et al, 1980;Onal and Lopata, 1982), but it has progressed into a diagnostic tool in clinical settings (Hemmerling et al, 2001). Because of its invasiveness and inconvenience for subjects undergoing the measurements, this study does not include im-rEMG, despite that this method being reported to be safe, feasible and reliable (Chen et al, 1996).…”

Section: Quality Of Remg Measurementsmentioning

confidence: 99%

A literature review of the methodology of EMG recordings of the diaphragm

Hutten¹,

Thuijl²,

Bellegem³

et al. 2010

Journal of Electromyography and Kinesiology

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“…This variability between subjects has been attributed to: individual differences in muscle fibre conduction velocity, contraction intensity and recruitment of motors units [16]; anatomical differences, differences in chestwall thickness [24]; difficulty in maximally stimulating the phrenic nerve [5,10]; the choice of chest-wall electrode sites [13]; and the interelectrode distance, with greater interelectrode distance increasing contamination [25]. The wide range of CMAPdi amplitudes has led investigators to exercise caution in interpreting CMAPdi amplitude [18].…”

Section: Significance Of the Findingsmentioning

confidence: 99%

“…The CMAPdi can be recorded from needle electrodes placed in the diaphragm [16] or from an oesophageal electrode [1]. Although with these techniques for EMG acquisition the electrodes are placed close to the diaphragm, they are invasive, uncomfortable, technically difficult and have not been widely adopted for diaphragm assessment.…”

mentioning

confidence: 99%

Diaphragm electromyograms recorded from multiple surface electrodes following magnetic stimulation

Glerant

Mustfa²,

Man³

et al. 2006

Eur Respir J

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The diaphragm compound-muscle action potential (CMAPdi), elicited by unilateral magnetic stimulation (UMS) of the phrenic nerve can be recorded using surface electrodes. However, there is no consensus on the best positioning of surface electrodes and there are no data on the reproducibility of the signal.Using 36 surface electrode pairs, in five healthy subjects, the CMAPdi elicited by UMS and electrical stimulation (ES) were compared and 12 pairs were identified as providing acceptable signals. The latency and amplitude were measured for each CMAPdi, following UMS at 60-100% of maximal stimulator output, in 12 healthy subjects, on two occasions.Latencies obtained using UMS and ES ranged between 6.1-7.33 and 6.25-7.17 ms, respectively. Optimum CMAPdi were not recorded from the same electrode pair in all subjects, or for both hemidiaphragms in each subject. However, the optimal recording site for a particular individual remained unchanged on subsequent testing. When recorded from the optimal site, latencies and amplitudes of CMAPdi elicited on the two occasions were not significantly different.The current study suggests that the use of multiple chest wall electrodes can identify an optimal electrode pair, from which it is possible to obtain reproducible compound-muscle action potential signals.

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Needle EMG of the human diaphragm: Power spectral analysis in normal subjects

Cited by 28 publications

References 22 publications

Quantitative motor unit potential analysis in the diaphragm: A normative study

Quantitative motor unit potential analysis in the diaphragm: A normative study

A literature review of the methodology of EMG recordings of the diaphragm

Diaphragm electromyograms recorded from multiple surface electrodes following magnetic stimulation

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