I found your study on nGVS and postural control in older adults quite insightful, especially regarding the interplay of sensory feedback mechanisms. I’m currently designing experiments on vestibular interventions for balance rehabilitation and had a few technical questions about your methodology.
1. You used 0.4 mA intensity with a white noise range of 0.1–640 Hz. How did you determine these specific parameters? Were alternative intensity or frequency bands tested to optimize postural control improvements?
2. The study categorizes older adults based on vestibular function using vHIT, cVEMP, and oVEMP. Were there cases where participants exhibited mixed results (e.g., normal vHIT but abnormal VEMPs)? If so, how were these cases classified?
3. Given that postural control can improve with repeated testing, how did you account for potential learning effects over multiple trials? Would a randomized condition order have altered the observed improvements?
4. The study focuses on immediate postural improvements, but did you assess whether the effects of nGVS persisted after stimulation was discontinued? If not, do you anticipate that repeated sessions could induce longer-lasting adaptations?
I’d appreciate any insights you can share, as I’m keen to apply these methods in my own research.