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| Stimulation |
| Cathode: monopolar hand held probe |
| Anode: monopolar needle in cervical muscles |
| Wave form: square wave, single pulse |
| Duration stimuli: 0.2 ms |
| Frequency: 1.0–4.0 Hz |
| Intensity: 2 mA for screening, then decrease the intensity to detect threshold |
| Recordings |
| Type of electrodes: hook wires |
| Filter: 20-3,000 Hz |
| Epoch length: 20 ms |
| Amplification: 10,000 times |
