Motor

 

Dist

.mm

Lat

Ms

Amp

mV

Vel

m/s

F ms

 

F-M ms

Median-APB

80

4.5

4.1

<40 – 5.9

>40 – 4.2

>60- 3.8

49

32

28

Ulnar – ADM

 

80

3.7

7.9

Bel Elb 52

Acr.Elb 43

32

27.5

Peroneal  - EDB

>60yrs -

80

6.5

1.3

<40 – 2.6

>40 – 1.1

38

 

55

49

Tibial – AHL

>60yrs

80

6.1

4.4

<30 – 5.8

>30 - 5.3

>60 – 1.1

39

 

59

53

Sensory

Upper limb

Distance

mm

Lat (peak)

ms

Amp

uV

Velocity

m/s

Median – D2

 

140

4.0

8

 

Ulnar     – D5

 

140

4.0

6

50

Median palm-wrist

 

80

2.2

10

 

Ulnar palm-wrist

 

80

2.2

5

 

 

 

 

 

 

Radial – snuffbox

Age 60 -

80

2.6

2.9

17

9

50

Lat cut forearm (antidromic)

10

2.5

6

 

Med cut forearm

(antidromic)

10

2.6

3

 

Lower limb

Distance

mm

Lat (peak)

ms

Amp

uV

Velocity

m/s

Sup. Peroneal

Age 60

140

4.3

4.6

6

3

40

 

 

 

 

 

Sural

Age 60

140

4.4

4.6

6

3

40

36

Significant differences

 

Lat diff. ms

Amp diff mV

Vel diff.m/s

Median ABP/ulnar ADM

Right vs Left

<0.8

<3 (~<50%)

 

Median ABP -Ulnar ADM

<1.5

 

 

Ulnar ADM – Median ABP

<0

 

 

Ulnar FDI Right vs left

<1

 

 

Radial EIP

 

<50%

 

Median Lum vs Ulnar interos.

<0.5

 

 

Ulnar ADM – across elbow

 

 

<15  (<23%)

Peroneal EDB/ Tibial AHL

Right vs Left

<7

 

 

Peroneal EDB – across fib head

 

 

<6 (<12%)

Sensory responses

<0.5

<50%