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Table 1 Electrophysiologic findings

From: Two case reports of distal upper limb weakness following influenza-like illness: an emerging pattern of para-infectious myositis in adults

 

Patient 1

Patient 2

Sensory Studies

Lat

Amp

Velocity

 

Lat

Amp

Velocity

 
 

ms

μV

m/s

 

ms

μV

m/s

 

R Median Digit 2

2.35

17.8

66

 

2.75

7.8

52.7

 

R Median Digit 3

    

3.05

7.5

47.5

 

R Ulnar Digit 5

2.05

7.5

63.4

 

2.05

5.5

56.1

 

R Median Palm (Mix)

    

1.65

23.6

48.5

 

R Ulnar Palm (Mix)

    

1.35

5.2

59.3

 

L Median Digit 2

    

2.9

6.8

51.7

 

L Median Digit 3

    

2.7

8.6

55.6

 

L Ulnar Digit 5

    

2.25

6.1

51.1

 

R Sural Calf

2.1

12

47.6

 

2.7

12.4

40.7

 

L Sural Calf

    

2.85

11.5

45.6

 

R Superficial Peroneal

    

2.75

7.8

41.8

 

L Superficial Peroneal

    

3.05

5.7

42.6

 

Motor Studies

Lat

Amp

Velocity

F Lat

Lat

Amp

Velocity

F Lat

 

ms

mV

m/s

ms

ms

mV

m/s

ms

R Median Wrist

2.8

13.1

  

3.25

10.6

  

R Median Elbow

7

13.2

59.5

26.1

7.85

9.9

60.9

28.6

L Median Wrist

2.8

10.9

  

3.15

11.2

  

L Median Elbow

6.65

11.1

65

26.05

7.95

11

56.3

28.6

R Ulnar Wrist

2.4

10.7

  

2.45

13.9

  

R Ulnar Below Elbow

5.85

10

75.4

26.05

6.8

14.5

57.5

 

R Ulnar Above Elbow

    

8.35

12.8

51.6

31.6

L Ulnar Wrist

2.25

6.7

  

2.55

8.2

  

L Ulnar Below Elbow

5.95

6.2

69.2

26.55

6.85

8.2

58.1

30.5

L Ulnar Above Elbow

    

8.5

7.9

54.5

 

R Com Peroneal Ankle

3.2

7.1

  

4.25

9.2

  

R Com Peroneal Fib Head

9.45

6.3

56

41.7

12.45

8.7

42.7

54.45

R Com Peroneal Knee

10.65

6.5

66.7

 

14.2

8.3

45.7

54

L Com Peroneal Ankle

    

4.25

8.1

  

R Post Tibial Ankle

4.75

18.8

  

4

15.7

  

R Post Tibial Knee

11.8

15.8

58.2

44.9

14.05

12.6

 

52.75

L Post Tibial Ankle

    

3.6

10.5

  

L Post Tibial Knee

    

13.95

8.7

45.4

55.6

EMG

MUAP

Recruit Pattern

MUAP

Recruit Pattern

 

Amp

Dur

Polyph

Amp

Dur

Polyph

R Triceps

    

N

N

N

N

R Extensor Dig Comn

N

N/1-

N/1+

N/Fast

1-

N

1+

Fast

R Flexor Dig Sup

    

N

N

1+

N

R First Dorsal Interos

N

N

N

N

1-

N

N

N

L Flexor Dig Sup

N

N/1-

N/1+

N/Fast

    

L Flexor Dig Prof IV

N

N/1-

N/1+

N/Fast

    

R Vastus Medialis

    

1-

N

N

N

R Tibialis Anterior

    

1-

N

N

Fast

  1. Table legend: Electrophysiologic findings for patients 1 and 2. There was no spontaneous activity on EMG in either of the two patients. EMG electromyography, Lat latency, Amp amplitude, F Lat minimum F wave latency, Mix mixed nerve, N normal, L left, R right, Dur duration, Polyph polyphasia, MUAP motor unit action potential, Com common, Comn communis, Fib fibular, Post posterior, Dig digitorum, Sup superficialis, Prof profundus, Interos interosseus, Recruit recruitment