Electromyographic Measurement of Fatigue in Rheumatoid Arthritis and Neuromuscular Disease

Lenman, J. A. R.; Potter, J. L.

doi:10.1136/ard.25.1.76

Cited by 11 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A further electromyographic study found surface abnormalities of the EMG signal, consistent with this mechanism, in 65% of cases with RA (Lenman & Potter 1966). The same mechanism is responsible for the sudden giving way of the knee and ankle when someone treads on a sharp nail.…”

Section: Muscle Diseasementioning

confidence: 66%

Clinical features of the foot in rheumatoid arthritis

2007

The Foot and Ankle in Rheumatoid Arthritis

View full text Add to dashboard Cite

Section: Muscle Diseasementioning

confidence: 66%

Clinical features of the foot in rheumatoid arthritis

2007

The Foot and Ankle in Rheumatoid Arthritis

View full text Add to dashboard Cite

“…Abnormal changes have also been described in rheumatoid arthritis: usually a fairly quick increase in amplitude; but the ratio between the vol tage produced and the force exerted is much more unfavourable than in normal subjects [Lenman and Potter, 1966],…”

mentioning

confidence: 99%

“…Therefore, the ratio between voltage produced and tension exerted [in the sense defined by Lenman and Potter, 1966] is less favourable in women. This can be interpreted as a lower "efficiency of electrical activity" in the sense defined by D e V ries [1968], There are feeble indications that phenomena of fa tigue in women are slightly more pronounced, but the difference from men is not significant.…”

mentioning

confidence: 99%

Comparison of the EMG in Normal Test Subjects, Hemiparetic Patients and Parkinson Patients; with Special Reference to Changes in Response to Fatigue

Visser¹,

Rijke²

1974

Eur Neurol

View full text Add to dashboard Cite

A study was made of the EMG in 20 normal test subjects (10 men and 10 women), 10 hemiparetic patients with a pyramidal syndrome, and 10 Parkinson patients. Under standardized conditions, a constant tension of 2,000 g was exerted with the adductor pollicis muscle during 60 sec. The EMG of this muscle was derived with surface and needle electrodes, submitted to analogous digital conversion and analysed with the aid of a PDP 8/I computer. Special attention was focused on the study of change in integrated amplitude, peak-to-peak amplitude, and the number of peaks in response to fatigue. It was found that women in the normal group had a lower ‘efficiency of electrical activity’ than normal men. In paretic patients, amplitudes measured with surface electrodes were relatively high and those measured with needle electrodes relatively low (poor synergistic action). The normal increase in amplitude in response to fatigue is absent in measuring with needle electrodes, but is observed with surface electrodes (exhaustion compensated by adjacent muscles of the same group). In Parkinson patients, too, normal increase in amplitude was measured with surface electrodes, whereas decreased amplitudes were found with needle electrodes.

show abstract

Action of diazepam on muscular contraction in man

Ludin

Dubach

1971

Z. Neurol.

View full text Add to dashboard Cite

Electromyographic Measurement of Fatigue in Rheumatoid Arthritis and Neuromuscular Disease

Cited by 11 publications

References 6 publications

Clinical features of the foot in rheumatoid arthritis

Clinical features of the foot in rheumatoid arthritis

Comparison of the EMG in Normal Test Subjects, Hemiparetic Patients and Parkinson Patients; with Special Reference to Changes in Response to Fatigue

Action of diazepam on muscular contraction in man

Contact Info

Product

Resources

About