Table 5 Intervention protocols and results in the study that targeted the cerebellum
Study | Polarity of target electrode | Electrode size (cm2) | Intensity (mA) Current density (mA/cm2) | Current density (mA/cm2) | Duration (min) | Number of sessions | Anatomical target (electrode placement) | Target electrode placement | Return electrode placement | State of medication during intervention | Combined intervention | Online/offline tDCS | Adverse effects | Outcome measurements | Timepoints of assessment | State of medication during assessment | Results | Conclusion | Effect size (typr) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Workman et al. 2020 [49] | Anode | T = R = 5 × 7 | 2 and 4 0.06 and 0.11 | 0.06 and 0.11 | 20 | 1 | Cerebellum (medial edge 1 cm below and 2 cm lateral to the inion over the cerebellar hemisphere contralateral to the more PD-affected side) | Medial edge 1 cm below and 2 cm lateral to the inion over the cerebellar hemisphere contralateral to the more PD-affected side | Upper arm or medial edge 1 cm below and 2 cm lateral to the inion over the cerebellar hemisphere ipsilateral to the more PD-affected side | NR | – | Offline | Burning sensation, itching, tingling, pins/needles | 25 ft. walk test; TUG; 6-min walk test, Berg Balance Scale | Before, after | NR | No significant effects on gait parameters but improvement in Berg Balance Scale | → | NR |