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Table 2 Normative median and ulnar nerve conduction values, Mayo Clinic Arizona EMG laboratory

From: Effects of Carpal Tunnel Syndrome on adaptation of multi-digit forces to object mass distribution for whole-hand manipulation

Nerve

Age < 60

Age ≥ 602

Median

Amplitude1

Wrist latency (ms)

Amplitude1

Wrist latency (ms)

Orthodromic sensory

≥50

< 2.3

M ≥ 17.4; F ≥ 40.1

< 2.5

Antidromic sensory

≥ 15

< 3.5

M ≥ 12.2; F ≥ 15.9

< 3.7

Motor

≥ 4

< 4.5

≥ 4.5

M: < 4.4; F < 3.8

Ulnar

    

Orthodromic sensory

≥ 15

≤2.3

M ≥ 3.4 ; F ≥ 14.4

< 2.3

Antidromic sensory

≥ 10

< 3.1

M ≥ 3.9; F ≥ 15.9

M < 3.5; F < 3.1

Motor

≥ 6

< 3.6

≥ 4.8

M: < 3.2; F < 2.9

  1. 1Amplitude values for sensory studies are microvolts and motor studies are millivolts.
  2. 2 Note that some normal values for subjects 60 years old and older are gender specific. M = male; F = female.