Potential effects of acute tVNS on heart rate variability
HRV assessment will be undertaken using a 3 – lead continuous ECG measure via the Finapres© device. HRV analysis will be undertaken during five minutes of rest pre-active stand or any cognitive assessments. Various HRV measures will be taken, however specifically the root mean square of successive R-R interval differences (RMSSD) is of interest as it has been shown to be most highly correlated with cognition and executive function on metanalysis [