Table 1.
Comparison of our wireless stimulation system with other available wireless optogenetic stimulators.
| Our current OptoStim system | Competitor 1 (Wentz et al., 2011) | Competitor 2 (Kim et al., 2013) | Competitor 3 (Ameli et al., 2013) | |
|---|---|---|---|---|
| Battery life | 2 h (20 min rechargeable) | None—RF Scavenging | None—RF Scavenging | None—Inductive power |
| Headstage size | 14 × 17 × 5 mm | <1 cm3 | ~1 cm3 (est.) | 15 × 25 × 17 mm |
| Headstage weight | 2.9 g (including battery) | 3 g | ~2 g | 7.4 g |
| LED size | 240 × 320 × 140 μm | 1 × 1 mm | 50 × 50 × ~6.45 μm | Dimensions vary |
| LED wavelength | Blue 465.5 nm | Blue 470 nm | Various (including blue ~450 nm) | Various |
| Range | 4 m | <1 m | Maximum unknown (tested 1–2 m) | >2 m (<7 cm power transmission) |
| LED location | Anywhere in the brain | Outside the brain (only for superficial brain regions) | Anywhere in the brain | Outside the brain. Light passed into brain via optic fiber |
| Time required for fabrication of implant; difficulty | <3 h; Easy | Exact details unknown 1 day for implant | ~11–14 days for fabrication; Difficult (requires specialized materials science laboratory) | Exact details unknown 1 day for implant |