Table 1.

Nerve conduction studies

	Pyridoxine treatment		Median motor		Tibial motor		Median sensory		Sural sensory		MAC sensory
			Amp	CV	Amp	CV	Amp	CV	Amp	CV	Amp	CV
Normal values			>5.6	>49	>5.9	>44	>7.5	>48	>3.5	>45	>17.7	>60
Age 30 years	1250–1750 mg/day for 20 years	Right	17.9	61	30.4	45	3.7	56	3.4	37	NR	NR
		Left	16.9	59	32.4	44	3.1	52	2.1	42	NR	NR
Age 31 years	500 mg/day for 1 year	Right	16.6	63	34.2	44	8.3	52	9.3	52	15.2	55
		Left	16.7	58	34.6	46	8.6	52	3.4	45	12.2	52
Age 34 years	500 mg/day for 4 years	Right	18.6	63	35.0	48	8.7	61	9.7	52	19.2	62
		Left	17.5	64	32.8	47	8.6	57	5.5	49	19	60

Abnormal values are in bold. Motor in mV and sensory in µV.

Amp: amplitude, CV: conduction velocity (in m/s); MAC: medial antebrachial cutaneous; NR: no response.