Normal Values Tables

Age
Amplitude (μV)
Conduction velocity (m/s)
Median nerve
Term newborn
≥3.5
≥22
0–1 month
≥3.5
≥24
1–3 months
≥5
≥25
3–6 months
≥5
≥32
6–12 months
≥5
≥33
1–2 years
≥9
≥41
2–4 years
≥13
≥45
4–6 years
≥14
≥48
Ulnar nerve
34–36 weeks gestation
–
≥10
Term neonate
≥4
≥13
2–4 weeks
≥6
≥17
1–3 months
≥6
≥20
3–6 months
≥6
≥26
6–12 months
≥6
≥28
1–3 years
≥6
≥29
4–6 years
≥6
≥33
Sural nerve
Term neonate
Any response
≥18
0–1 month
Any response
≥21
1–3 months
Any response
≥23
3–6 months
Any response
≥26
6–12 months
Any response
≥30
1–2 years
≥6
≥34
2–4 years
≥6
≥38
4–6 years
≥6
≥41
Medial plantar nerve
Term neonate
≥10
–
1–6 months
≥15
≥35
6–12 months
≥15
≥40
1–2 years
≥15
≥40
Note: Data are derived from material in [6–13]. Nearly all the source articles used the orthodromic approach [6–13], but data from an antidromic study [8] was also determined to be valuable to include both due to the frequent use of that approach and also in light of the paucity of published data. Some values are marked “any response” due to large standard deviations in the source data. Of note, sural nerve responses are often difficult to elicit in infants
Table 24.2
Suggested normal values for motor nerve conduction studies
Age
Distal latency (ms)
Amplitude (mV)
Conduction velocity (m/s)
Median nerve
23–29 weeks gestation
  
Any response
≥7
29–33 weeks gestation
  
Any response
≥16
33–38 weeks gestation
≤3.8
Any response
≥19
Term neonate (38–42)
≤3.5
≥2.5
≥20
2–4 weeks
≤3.0
≥2.5
≥23
1–6 months
≤3.0
≥3.5
≥30
6–12 months
≤3.0
≥2.3
≥35
12–18 months
≤3.0
≥3.7
≥40
18–24 months
≤3.0
≥3.7
≥45
2–3 years
≤3.1
≥2.0
≥47
3–4 years
≤3.1
≥2.0
≥48
4–5 years
≤3.2
≥3.0
≥49
Adult
≤4.5
≥4.1
≥49
Ulnar nerve
34–37 week gestation
≤3.0
–
≥15
Term neonate
≤3.5
≥1.0
≥20
0–1 months
≤3.5
≥2.0
≥20
1–6 months
≤3.0
≥2.5
≥30
6–12 months
≤2.5
≥3.0

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Nov 18, 2017 | Posted by in PEDIATRICS | Comments Off on Normal Values Tables

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