Table 1

Results of electrophysiological investigations at intervals during 5 years after injury

		Electromyography				Nerve conduction studies
		Spontaneous activity	Motor units			Interference pattern	DML (ms)	MCV (M/s)	CMAP (mV)	SNAP (Amplitude)
1 Month:
Left biceps brachii, right tib ant, biceps femoris and rectus femoris	Profuse fibrillations and PSW	No motor units seen		Left brachial plexus	Muscle twitches from pectorals and deltoid
Left pectoralis		Some fibrillations		Infrequent burst of normal motor units				Left median	No response				Absent
Left pectoralis		Some fibrillations		Infrequent burst of normal motor units				Left radial	No response				Absent
Left deltoid	Some fibrillations	Occasional motor units		Right lat pop	No response
Left APB and FDIO	Profuse fibrillations and PSW	No motor units seen

5 Months:								Left median	No response				Absent
5 Months:								Left radial	No response				Absent
Left EDC, left and right tib ant	Profuse fibrillations and PSW	No motor units seen		Right and left lat pop	No response
Right rectus femoris	Few Fibrillations	Highly complex motor units		Right and left sural				Absent

24 Months
Left EDC	Nil.	High firing and large units	Reduced 3 mV	Left brachial plexus- biceps	8.0
Left APB	Few fibrillations	Polyphasia and complex units	Reduced 1 mV	Left median	4.5	32 (E–W)	0.9	Absent
Left FDIO	Some fibrillations and PSW	No motor units seen		Left ulnar and radial				Absent
Right rectus femoris	Nil.	High firing and large units	Reduced 3 mV
Left tib ant	Fibrillations	No motor units seen

33 Months:
Left FDIO	Few fibrillations	A single unit	Discrete	Left median	4.4		3.8	Absent
Right tib ant	Nil	Few complex units	Reduced 1–2 mV	Left ulnar	5.1		0.08	Absent
				Right post tib	8.5
				Right lat pop	3.8		0.4

60 Months:
Left tib ant		Patchy areas of fibrillations and PSW		High firing polyphasic units		Reduced 3–4 mV		Left median	3.8		30 (E–W)	4.7	6 μV
Left tib ant		Patchy areas of fibrillations and PSW		High firing polyphasic units		Reduced 3–4 mV		Left sural	3.8		30 (E–W)	4.7	Absent
				Left lat pop	4.6		1.3

APB=Abductor pollicis brevis; FDIO=first dorsal interosseous; Tib ant=tibialis anterior; EDC=extensor digitorum communis; PSW=positive sharp waves; lat Pop=lateral popliteal nerve; Post tib=posterior tibial.