BBC NEWS | Health | Brain pulses stimulate deep sleep

BBC NEWS Health Brain pulses stimulate deep sleep: "A good night's sleep may be as simple as flipping a switch, say scientists.
By sending magnetic pulses through the skulls of sleeping volunteers, US researchers were able to stimulate the slow brain waves seen in deep sleep.
Such a machine-generated 'power nap' could one day be an insomnia treatment, the Proceedings of the National Academy of Sciences study suggests.
However, it is unclear whether electronically assisted sleep confers the same benefits as natural sleep. "