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Table 2 Nerve conduction study findings of the four cerebrotendinous xanthomatosis patients

From: Neuromuscular abnormality and autonomic dysfunction in patients with cerebrotendinous xanthomatosis

Case   Median Ulnar Superficial radial Peroneal Tibial Sural H-reflex (N < 27.6)
   Motor Sensory Motor Sensory      
I-1 R DL (ms) 4.4 (N < 3.6) 2.8 2.9 (N < 2.8) 2.2 1.9 4.0 (N < 4.2) 2.7 (N < 4.9) Absent 31.0
  L DL (ms) 4.4 3.0 2.5 2.9 1.7 4.0 3.7 Absent 30.4
  R CV (m/s) 50 (N > 57.8) 50 (N > 51.7) 50 (N > 61.4) 56 (N > 56.3) 63 (N > 50) 39 (N > 48.6) 45 (N > 50.5) Absent (N > 47.4)  
  L CV (m/s) 49 47 54 49 71 42 40 Absent  
  R Amp 7.6 (N > 11.9) 47 (N > 33) 11 (N > 11.7) 32 (N > 26.1) 23 (N > 15) 4.1 (N > 6.0) 5.5 (N > 13.1) Absent (N > 12.5)  
  L Amp 7.1 21 8.1 38 33 4.5 9.6 Absent  
  R F waves 26.8-0.7 (N < 25.4)   27.0-0.8 (N < 25.0)    49.8-0.4 (N < 44.7) 50.2-0.8 (N < 45.0)   
  L F waves 27.9-0.8   26.4-1.0    47.4-0.4 50.4-0.8   
I-2 R DL (ms) 4.4 2.7 3.2 2.6 2.1 4.2 5.0 Absent 32.4
  L DL (ms) 4.0 2.8 3.0 2.2 1.8 3.9 3.3 Absent 32.6
  R CV (m/s) 49 53 54 46 57 39 41 Absent  
  L CV (m/s) 51 50 51 54 67 41 40 Absent  
  R Amp 8.6 23 7.3 26 34 2.9 10.5 Absent  
  L Amp 9.2 31 8.8 13 60 3.8 6.7 Absent  
  R F waves 30.0-0.5   28.8-1.0    50.5-1.0 51.8-1.0   
  L F waves 28.3-1.0   28.4-1.0    50.1-0.6 53.9-1.0   
II-1 R DL (ms) 4.3 2.8 3.0 2.4 2.1 Absent 4.5 Absent 38.4
  L DL (ms) 4.1 3.0 2.8 2.5 2.0 4.9 5.1 Absent 37.5
  R CV (m/s) 44 50 42 50 56 Absent 32 Absent  
  L CV (m/s) 46 47 43 48 60 30 34 Absent  
  R Amp 10.3 42 11.5 20 25 Absent 4.0 Absent  
  L Amp 11.7 47 9.9 29 32 2.4 2.6 Absent  
  R F waves 32.6-1.0   32.1-1.0    Absent 70.6-0.6   
  L F waves 30.4-0.9   30.4-1.0    79.2-0.2 75.7-0.9   
II-2 R DL (ms) 4.0 2.5 2.8 2.0 1.7 4.4 3.4 Absent 31.9
  L DL (ms) 4.2 2.7 3.0 2.3 1.7 3.8 3.8 Absent 31.6
  R CV (m/s) 52 56 58 60 71 39 41 Absent  
  L CV (m/s) 52 52 50 53 71 43 39 Absent  
  R Amp 8.5 29 6.6 38 16 3.2 4.7 Absent  
  L Amp 7.4 50 6.7 40 29 4.7 2.0 Absent  
  R F waves 29.8-1.0   30.4-0.8    54.2-0.3 53.3-1.0   
  L F waves 29.6-1.0   31.6-0.9    50.9-0.8 56.5-0.9   
  1. N = normal; DL = distal latency; CV = conduction velocity; Amp = amplitude (mV in motor nerves and μV in sensory nerves); F waves = minimal latency-persistent rate; H-reflex = soleus H-reflex in minimal latency; AT = anterior tibialis; FDI = 1st dorsal interosseous muscle; R = right; L = left