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Spino-muscular evoked potentials (sm-EP)
| Stimulation | Bipolar spinal electrode | Stimulus (cathode) | ISI | Intensity | Duration | Rate of repetition |
|---|---|---|---|---|---|---|
| Spinal cord | Epidural or subarachnoidal | Repeated single (or train) stimuli | −(2.5 ms) | (0.2–15) mA | 0.2 ms | 1/s |
| Recording | Electrodes | Potential | Filters | Sensitivity | Sweep | Averaging |
|---|---|---|---|---|---|---|
| Muscles of interest, synchronous | 2 surface electrodes/muscle | CMAP | 0.05–3 kHz | 0.05 mV/D | 10 ms/D | 2–10 |
