Habituation of auditory startle reflex should be considered as a sign of the minimally conscious state, as unresponsive patients who demonstrate this behaviour show increased brain activity and better outcomes compared to patients with inextinguishable startle reflexes.
The improvements observed following transcranial direct current electrical stimulation in some brain-injured patients are associated with increased EEG markers and correlate with the intensity of cortical electric field next to the stimulation electrodes.
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