Mild non-invasive brain stimulation for apathy in Huntington's disease

Randomized and counterbalanced sequence of three sessions of transcranial alternating current stimulation (tACS) conducted at least 72 hours apart, with details as follows:<br> 1) 20 minutes and 2mA at the participants peak individualised alpha frequency;<br> 2) 20 minutes and 2mA at 2Hz (delta frequency);<br> 3) 20 minutes of sham (placebo) with 30 seconds 'fade in' followed by an immediate 30 seconds 'fade out'.<br> TACS is administered using a Startstim wireless hybrid electroencephalography(EEG)/transcranial current stimulation 8-channel system (Neuroelectrics, Spain).<br> EEG obtained via a 50-channel Neuroscan EEG system.<br> All data collection (baseline measures, resting and task-related EEG) and tACS administration is conducted by Marie-Claire Davis (Registered Psychologist with practice endorsement in Clinical Neuropsychology and PhD candidate).