Table 1. Electromyographic assessment of spontaneous and voluntary muscle activity in right-sided muscles.

Electromyographic findings from the right posterior deltoid, biceps brachii, first dorsal interosseous, rectus femoris, and tibialis anterior muscles show polyphasic motor unit potentials and early recruitment patterns, indicating a myopathic process. Occasional fasciculations (1+) are present while the absence of fibrillation potentials and positive sharp waves reduces the likelihood of acute denervation.

		Spontaneous Activity			Voluntary Activity
Muscle	Interpretation	Fibrillation potentials	Positive sharp waves	Fasciculations	Amplitude of motor unit potentials	Duration of motor unit potentials	Polyphasic potentials	Insertional potential	Recruitment pattern
Right Deltoideus Posterior	Myopathy	0	0	1+	-	-	+	+	Early
Right Biceps	Myopathy	0	0		-	-	+	+	Early
Right Interosseous Dorsalis	Myopathy	0	0		-	-	+	+	Early
Right Rectus Femoris	Myopathy	0	0	1+	-	-	+	+	Early
Right Tibialis Anterior	Myopathy	0	0		-	-	+	+	Early