| |
Normal
|
Patient 1
|
Patient 2
|
|---|
| | |
Age at study
| |
|---|
| | |
12 years
|
13 years
|
16 years
|
13 ½ years
|
|---|
|
MOTOR:
| | | | | |
|
Median nerve
| | | | | |
|
DML (wrist to APB)
|
< 4.2
| |
3.6
|
5.4
|
3.4
|
|
CMAP (mV)
|
≥ 3.9
| |
9.2
|
4.1
|
8.6
|
|
CV (m/sec)
|
> 47
| |
27
|
27
|
33
|
|
Ulnar nerve
| | | | | |
|
DML (msec; wrist to ADM)
|
< 3.4
|
2.6
|
3.1
|
3.6
|
2.2
|
|
CMAP (mV)
|
≥ 5.9
|
13.1
|
12.7
|
4.6
|
7.7
|
|
CV (m/sec)
|
> 47
|
25
|
27
|
23
|
24
|
|
Tibial nerve
| | | | | |
|
DML (msec; ankle to AH)
|
< 6.0
|
5.3
|
6.2
|
10.5
|
4.5
|
|
CMAP (mV)
|
≥ 3.9
|
3.3
|
3.6
|
0.5
|
6.6
|
|
CV (m/sec)
|
> 39
|
21
|
22
|
15
|
26
|
|
Peroneal nerve
| | | | | |
|
DML (msec; ankle to EDB)
|
< 6.0
|
5.0
| |
8.5
|
4.5
|
|
CMAP (mV)
|
≥ 2.4
|
1.7
| |
0.8
|
2.9
|
|
CV (m/sec)
|
> 39
|
22
| |
17
|
43
|
|
SENSORY:
| | | | | |
|
Median nerve
| | | | | |
|
PL (msec; wrist to digit-II)
|
< 3.2
|
2.5
|
2.8
|
3.4
|
2.1
|
|
SNAP (μV)
|
≥ 14
|
67
|
69
|
15
|
36
|
|
CV (m/sec)
| |
46
|
39
|
40
|
52
|
|
Ulnar nerve
| | | | | |
|
PL (msec; wrist to digit-V)
|
< 3.3
|
2.0
|
2.2
|
3.1
|
2.2
|
|
SNAP (μV)
|
≥ 9
|
43
|
64
|
26
|
44
|
|
CV (m/sec)
| |
47
|
50
|
35
|
43
|
|
Sural nerve
| | | | | |
|
PL (msec; calf to lat mall)
|
< 4.2
|
3.8
|
3.0
|
NR
|
2.7
|
|
SNAP (μV)
|
≥ 5
|
11
|
17
|
NR
|
9.5
|
|
CV (m/sec)
| |
42
|
40
|
NR
|
35
|
- Bold and underlined values are abnormal. All sensory responses are antidromic.
- Legend: DML=distal onset motor latency; CMAP=compound motor action potential; CV=conduction velocity; PL=peak onset latency; APB=abductor pollicus brevis; ADM=abductor digiti minimi; AH=abductor hallucis; EDB=extensor digitorum brevis; NR=no response.
