(C) Muscle	Spontaneous activity				Motor units				Recruitment
	Insertion	Fib	PSW	Fasc	Firing	Amp	Dur	Poly.	Pattern
Right vastus lateralis	None	None	None	None	3+	Norm	Norm	None	Discrete
Interpretation	Can be prolonged in denervation	Few fibs and PSW can be normal but profuse in complete denervation		Can be present in normal muscle and denervation	Rapid firing in denervation	Can be normal in acute nerve lesions			Full interference in Healthy muscle Discrete recruitment in denervation as more motor units drop out

(C) Needle electromyography. Reference range in brackets.

Amp, amplitude; Dur, duration; Fasc, fasciculations; Fib, fibrillation; Norm, normal; Poly, polyphasic; PSW, positive sharp waves.