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Table 1 Electrodiagnostic Studies

From: A patient with amyotrophic lateral sclerosis and atypical clinical and electrodiagnostic features: a case report

   Initial Repeat
   Right Left Right
Study Nerve DML (ms) AMP (mV) CV (m/sec) DML (ms) AMP (mV) CV (m/sec) DML (ms) AMP (mV) CV (m/sec)
Motor Tibial (AH) 6.6 0.4 26 7.4 1 37 NR NR NR
  Peroneal (EDB) 7.9 0.1 29 7.9 12 37 NR NR NR
  Median (APB) 4.4 7 51     6.4 0.7 29.6
  Ulnar (ADM) 3.4 8 56     3.5 2.4 47
Sensory Sural   21.2 31       
  Median(dig 2)   13 53      3.6 44
  Median(dig 3)   9.4 49       
  Ulnar   8.7 46      3.0 42
   Mean F-wave latency (ms)     Mean F-wave latency (ms)
F-Wave Tibial(soleus) NR       
  Median (APB) 33 (predicted 28.9)     41.4 (predicted 28.9)
  1. Normal values: DML - peroneal ≤ 6.1 ms; tibial ≤ 6.4 ms; median ≤ 4.5 ms; ulnar ≤ 3.4 ms. MNCV (amplitudes) - tibial ≥ 39 m/sec (≥ 4 mV); peroneal ≥ 39 m/sec (≥ 3 mV); median ≥ 49 m/sec (≥ 4 mV); ulnar ≥ 49 m/sec (≥ 4 mV). SNAP conduction velocities (amplitudes) - sural ≥ 39 m/sec (≥ 6 μ); median ≥ 49 m/sec (10 μV); ulnar ≥ 49 m/sec (≥ 3 μV). Abnormal values in bold.