Electromyographic Changes in Rheumatoid Arthritis

Electromyographic Measurement of Fatigue in Rheumatoid Arthritis and Neuromuscular Disease

“…Histological evidence of patchy degeneration of muscle fibres, "nodular myositis", has been reported as a feature of rheumatoid disease (Steiner, Fruend, Leichtentritt, and Maun, 1946), and needle electromyography in patients with this disease has shown patterns with an excess of polyphasic motor units resembling those ofmuscular dystrophy and ofpolymyositis (Steinberg and Wynn Parry, 1961). In addition, these workers and others have observed discontinuities in the strength/duration curves in rheumatoid disease, indicating partial denervation, perhaps as a consequence of damage to the distal nerve terminals.…”

Muscle ATP Content in Rheumatoid Arthritis - a Biopsy Study

“…A negative nitrogen balance has been reported (2,19). In a high percentage of cases evidence of polymyositis has been found by electromyographic studies (11,12,14). A decreased capacity for isometric work has also been reported (7,16).…”

Muscular Changes in Rheumatoid Arthritis

“…Thus Morrison, Short, Ludwig, and Schwab (1947) detected involuntary activity in muscles related to involved joints, but Mueller and Mead (1952) found this could invariably be stopped by careful positioning of the joints. Steinberg and Parry (1961) found changes which they claimed were indicative of polymyositis in 85 per cent. of 93 cases though they have no details of any objective measurements of volitional activity.…”