Neural, Behavioural, and Clinical Effects of tDCS in PDOC; Feasibility Study

Inclusion Criteria: * Aged 18 years or older * Receiving care at a recruitment site, with a consensus clinical diagnosis of PDOC from any aetiology (i.e. traumatic or non-traumatic injury). * Stable and with no need of mechanical support (i.e. respirator, etc.) Exclusion Criteria: * Scalp skin sores or any skin damage at the electrode sites * Metallic implants in the face or skull * Craniectomy or cranioplasty * No evidence of auditory startle in clinical observations, or absent brainstem auditory evoked potentials in recent clinical history (if data available) * MRI incompatible: metal plates incompatible with MRI scanners, pacemaker, inability to lay flat for prolonged periods of time, aneurysm clips, neurostimulators, brain/subdural electrodes, etc. (MRI stream ONLY)