An electrical stimulation device provides stimulation of a person's claustrum and piriform cortex to treat seizures for persons having epilepsy, and to improve consciousness in individuals with disorders of consciousness such as coma. The stimulation device includes a stimulator that generates a stimulation signal, and one or more electrodes located near the target brain regions (Claustrum/piriform cortex). The electrode receives the stimulation signal from said stimulator and imparts the stimulation signal to the target brain regions.