Table 2.

Stimulation protocols

Protocol	Description	No. of increasing stimulus intensities	No. of repetitions per intensity
Input-output (I/O)	1× square pulse @ 0.06 Hz	5–10 intensities	5–10 once every 15 s
Short-term plasticity (STP)	3× square pulses @ 50 Hz	1–3 intensities	3–8 once every 30 s