Consciousness on/off switch

See this article.

When [...] the claustrum is electrically stimulated, consciousness — self-awareness, sentience, whatever you want to call it — appears to turn off completely. When the stimulation is removed, consciousness returns. [...] Curiously, even though stimulating the claustrum removed consciousness, the patient was still awake. Consciousness is often discussed in relation to wakefulness, but seemingly they are not as closely connected as originally thought."