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Table 3 F wave parameters recorded from ADM muscle in patients with ALS with and without pyramidal signs

From: Evaluation of F wave and split hand index in patients with amyotrophic lateral sclerosis

Parameter

Pyramidal signs in patients with ALS

P value

No n = 24

Yes n = 20

F min latency (ms)

28.27 ± 1.62

28.13 ± 1.48

0.74

F mean latency (ms)

29.09 ± 1.48

30.28 ± 2.63

0.207

F max latency (ms)

32.48 ± 2.16

32.21 ± 2.61

0.547

F chronodispersion (ms)

4.16 ± 1.46

4.1 ± 1.98

0.777

F persistence (%)

87.58 ± 15.92

83.62 ± 17.94

0.379

F max amplitude (μV)

591.36 ± 189.18

742.6 ± 243.34

0.015

F mean amplitude (μV)

386.81 ± 119.62

549.35 ± 239.83

0.013

F median amplitude (μV)

438.65 ± 169.3

564.8 ± 196.96

0.029

F wave duration (ms)

10.1 ± 0.91

10.63 ± 1.5

0.150

FWCV (m/s)

57.23 ± 4.58

56.95 ± 7.69

0.333

Giant F wave (n)

1.4 ± 3.03

1.58 ± 3.17

0.111

F/M Max AR (%)

7.21 ± 1.1

8.87 ± 1.78

< 0.001

F/M mean AR (%)

4.35 ± 1.26

6.22 ± 2.3

0.012

F/M median AR (%)

6.5 ± 2.8

8.3 ± 6.3

0.045

IRN (%)

4.015 ± 8.678

9.25 ± 21.22

0.703

IRF

3.15 ± 7.036

5.917 ± 12.12

0.781

  1. ALS amyotrophic lateral sclerosis, min minimum, max maximum, FWCV F wave conduction velocity, AR amplitude ratio, IRN index repeating neuron, IRF index repeater f wave