TABLE 5.
The closed-loop stimulation system for PD.
| Source | Platform | Clock (MHz) | Filter (Hz) | Feature |
| Lee et al. (2008) | N/A | 0.2 | 17–5.3 k | Amplitude of 10–50 Hz |
| Azin et al. (2011) | N/A | 1 | 0–10 k | Amplitude of 20–40 Hz |
| Loukas and Brown (2012) | NI DAQ | N/A | N/A | Meyer’wavelet for instantaneous bandpower (13–30 Hz) |
| Parastarfeizabadi et al. (2016) | MCU | N/A | 0–130 | Amplitude of 13–35 Hz |
| Arlotti et al. (2016) | MSP 430 | N/A | N/A | Bandpower (10–16 Hz) |
| Herron et al. (2016) | Activa PC + S | N/A | N/A | Bandpower (20–32 Hz) |
| Little et al. (2016) | N/A | N/A | N/A | Bandpower (12–30 Hz) |
| Wu et al. (2017) | IEC 60601-1 | 13.56 | 12–30 | Bandpower (4–64 Hz) and entropy |
| Swann et al. (2018) | Activa PC + S | N/A | 60–90 | Bandpower (80 ± 2.5 Hz) |
| Chen et al. (2018) | FPGA | N/A | 30–10 k | Amplitude of 20–40 Hz |
| Zhou et al. (2019) | WAND | 166 | 1–200 | Bandpower (0–4 and 4–7 Hz) |
| Xu et al. (2020) | NI DAQ | N/A | 1–8 k | AP probability mapping |
AP, action potential; N/A, not applicable.