1 2

3

G2G1

10 V1ms

Sural N

4

5 6

7

Schwann

1 mmSchwann

8

Schwann

9

Na+

10

impu

lse

11

impu

lse

12

13

m/

50m/s 40m/s

14

27

34

46 m/s 23 V

57m/s 18 V

Sural SNAP

15

Na+

Na+

16

17Microneurography

Inglis JT et al J. Physiology 1998

18

19

10010

1

0.1

B

D

mV

19

20

SNAP, CNAP

20

21

0.1mV

100 ms

*

0.1mV

10 ms

* *

* *

22

23 Motor Unit MUP

MUP

24

25

25F

200V

100 200 V

26

Compound Muscle Action Potential (CMAP)

Compound Nerve Action Potential (CNAP)Compound Sensory Nerve Action Potential (CSNAP)

Compound

27

5mV3ms

5 V2ms

28

5mV3ms

5 V2ms

5005

CMAP SNAP

29

μV

=30

mV

= 31

CMAP MUP 100 V10mV

32

5mV, 5ms

0.2mV, 5ms

MUP

CMAP

MUP

2mV, 5ms

33

mV

= 34

35

3 cm

10 cm

30 m/s60 m/s

0.5 0.8 ms

1.7 2.5 ms

3 cm

10 cm

36

SNAP CMAP?

(Kimura 1986)

37 CMAP

1 ms

(Kimura 1986)

6 ms

(Kimura 1986)

38

(SNAP)

1 ms(Kimura 1986)

1 ms

1.8 ms

39Motor Sensory

3

1 ms

Duration 6 ms Duration 1.2 ms

40

41 42

56 m/s

27 m/s

61 m/s

43

31 m/s

27 m/s

23 m/s

44

62SNAP

6.3 ms

2.8 ms

2 V

18 V

SNAP

4562

SNAP

6.3 ms

2.8 ms

2 V

18 V

46

47

SNAP

CMAPSNAP

48

49

56 m/s2 mV

3 ms

50

51

G1(-)G2(+)

volume conductor

52

123

. 1997.

53

54

23 1

incoming positivityaction potentialoutgoing positivity

(0 mV)

active sinkpassive source

1

2

3

54

(G1)

55

(G1)

56

(G1)

57

(G1)

58

(G1)

59

incoming positivity

outgoing positivity

action potential

60

G2G1

10 V1ms

Sural N

61

3ms

5mV

G1

G2

62

3ms

5mV

G1

G2

63 64

Lumbricalis

APB

Median nerve

G1G2

65

Lumbricalesmedianulnar

APB

66

Tibial Nerve

Peroneal Nerve G1G2

67