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Table 2 Results of SEP study

From: A patient with McLeod syndrome showing involvement of the central sensorimotor tracts for the legs

SEPs with median nerve stimulation

SEPs with tibial nerve stimulation

Potential

Montage

Latency (ms)

Normal limit (ms)

Potential

Montage

Latency (ms)

Normal limit (ms)

(1) N9o

EPi-EPc

9.6

9.7

(1) N8o

Pfi-K

7.4

8.7

(2) N11o

C5s-Fz

11.1

11.6

(2) N21

L1 s-Icc

21.2

26.7

(3) N13o

C5s-Fz

13.3

13.7

(3) P38o

Cz’-Fz

40.7

38.2

(4) N20o

C3’-Fz

17.4

18.0

(4) P38

Cz’-Fz

47.9

44.7

  

Conduction time (ms)

   

Conduction time (ms)

 

CSCT [(4)–(3)]

 

4.1

4.8

CSCT [(3)–(2)]

 

19.5

13.2

  1. SEP somatosensory-evoked potential, CSCT central sensory conduction time
  2. EPi ipsilateral Erb’s point, EPc contralateral Erb’s point
  3. Pfi ipsilateral popliteal fossa, K ipsilateral medial popliteal fossa, Icc contralateral iliac crest
  4. The bold Italic values indicate over the normal limits