Acute / Short-Term Studies
Farmer et al. 2021 — Table 2. Grouped by electrode material.
47 studies
Long-Term Clinical Studies
Farmer et al. 2021 — Table 1. Extended duration / clinical trials.
Common Parameters
Distribution of stimulation parameters across all acute studies.
Frequency
Hz across 47 studies
25Hz
~60% of studies · Next most common: 30 Hz (7 studies)
Pulse Width
µs across studies
200–300µs
Most common range · Full range: 100 µs – 20 ms
Duty Cycle
On/off pattern
30s on / 30s off
Most common · Also seen: Continuous, Resp-gated
Placement
Anatomical target
Cymba concha
Left ear · Majority of studies · Tragus: 2nd most common
Device Availability by Category
Custom-made vs off-the-shelf, per electrode group
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