Nerve conduction: | |
Reduced CMAP | 5 (25%) |
Slow motor and sensory conduction velocity | 2 (10%) |
EMG: | |
Fasciculations | 8 (40%) |
Fibrillations/Positive sharp waves | 17 (85%) |
Myokymia | 1 (5%) |
Complex repetitive discharges | 4 (20%) |
Quantitative EMG in 13 patients: | |
Increased polyphasics (15-60%) | 11 (85%) |
Short mean duration - all MUPs ( 26-48%) | 10 (77%) |
Short mean duration - simple MUPs (34-46%) | 13 (100%) |
Quantitative EMG and diagnosis of myopathy: | |
|
qEMG done
|
qEMG not done
|
Diagnosis of myopathy | 13 | 1 |
No diagnosis of myopathy | 0 | 7 |