IIUC, Na is used like signaling medium in body and alkaline metals that isn't Na tends to reduce blood pressure, slow heartbeat and neural activity. With that i

IIUC, Na is used like signaling medium in body and alkaline metals that isn't Na tends to reduce blood pressure, slow heartbeat and neural activity. With that in mind, it sounds reasonable that those tendency could lead to slightly deeper sleep. Or is there something else to it?