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