Table 3

- Needle EMG of upper limb showed denervation potentials in the left biceps and bilateral first dorsal interosseous. Left upper limb showed neurogenic polyphasic MUAPs in all sampled muscles. Recruitment pattern was reduced with more reduction in distal muscles. Right side showed few polyphasic in extensor digitorum and first dorsal interosseous. Right deltoid was mostly unremarkable.

Needle EMG Summary
Muscle	Root	Ins. Act	Fibs.	PSW	Fascics.	Polyp.	MU amp.	MU Dur.	Pattern	Recruit
Left
Deltoid	Axillary C5-C6	Nor	0	0	0	++	+	++	Reduced	Mod. Redu
Biceps Brachi	Musculocut C5-C6	Nor	1+	0	0	++	+	++	Reduced	Mod. Redu
Triceps	Radial C6-C7	Nor	0	0	0	++	+	+	Reduced	Mod. Redu
Ext Dig. Com	Post Inter C7-C8	Nor	0	0	0	++	+	++	Reduced	Severe Redu
First Dors. Int	Ulnar C7-T1	Nor	1+	1+	0	+	+	+	Reduced	Poor Activation
Right
Deltoid	Axillary C5-C6	Nor	0	0	0	+	+	+	Full	Normal
Ext. Dig. Com	Post Inter C7-C8	Nor	0	0	0	++	++	+	Full	Normal
First Dors. Int	Ulnar C7-T1	Nor	1+	0	0	++	++	+	Full	Normal

PSW - Positive sharp waves, MU -Motor unit, EMG - Electromyography, MUAPs - Motor unit action potentials