Table 1.

Findings of concentric needle electromyography that supports the diagnosis of motor neuron disease

			Maximum effort
Muscle	Spontaneous activity	Motor units	Number	Maximum size (mV)
Right tibialis anterior	Fasciculations 3+ Positive sharp waves 3+ fibrillations 2+	Long-duration polyphasic units	Discrete	4
Left tibialis anterior	Fasciculations 3+ Positive sharp waves 1+ Fibrillations 2+	Long-duration polyphasic units	Discrete	4
Right vastus lateralis	Fasciculations 3+ Fibrillations 2+	Long-duration polyphasic units	Reduced	2.5
Right first dorsal interosseous	Fasciculations 4+	Long-duration polyphasic units	Discrete	4
Right biceps brachii	Fasciculations 3+	Long-duration polyphasic units	Reduced	4
Right trapezius	Fasciculations 2+	Long-duration polyphasic units	Discrete	1