Table 1.

Nerve conduction results for Patient 1.

Nerve	4.5 Years of Age		7 Years of Age		10 Years of Age *
	Amplitude	Conduction Velocity (m/s)	Amplitude	Conduction Velocity (m/s)	Amplitude	Conduction Velocity (m/s)
R median motor	3.5 mV	73.9 m/sec	NP	NP	6.5 mV	NR
L median motor	NP	NP	5.0 mV	50.2	8.9 mV	83.0
R tibial motor	12.0 mV	61.7	12.5 mV	42.4	NP	NP
L tibial motor	NP	NP	NP	NP	17.1 mV	39.5
R peroneal motor	4.8 mV	72.4	9.2 mV	58.1	NP	NP
L peroneal motor	NP	NP	NP	NP	0.03 mV	NR
R median sensory	15.0 uV	56.8	NP	NP	NP	NP
L median sensory	NP	NP	36.0 uV	50.3	13.7 uV	65.7
L ulnar sensory	NP	NP	NP	NP	Absent	Absent
L sural sensory	5.8 uV	78.7	NP	NP	17.9 uV	78.3
R sural sensory	39.9 uV	95.2	65.4 uV	40.3	NP	NP
EMG	Not performed		EMG of the right tibialis anterior and bilateral vastus lateralis muscles shows large and polyphasic motor unit potential. Fibrillations are present in the right vastus lateralis.		EMG of the left FDI and APB muscles showed reduced recruitment with large polyphasic motor unit potentials. No fibrillations were noted.

* A further neurophysiologic study performed at 10 years of age due to cramping and fasciculations in the left upper limb. FDI = first dorsal interosseous, APB = abductor pollicis brevis, NP = not performed, NR = not recorded. Abnormal values are shown in bold type using a 5th percentile cut-off for motor and sensory amplitudes from Ryan et al. (2019) [17].