11.   Like shock therapy, TMS stimulates the brain with an electrical current.

12.   Nearly a dozen students scramble to the office for their Ritalin, a drug that calms the agitated by stimulating the brain.

13.   Practitioners of aromatherapy believe the volatile chemicals directly stimulate the brain or are absorbed through the skin into the bloodstream, where they can affect internal organs.

14.   Regular doses of magnetic pulses stimulate the brain and may cure depression, so could the treatment be used to change mood in healthy people?

15.   Some drinks have caffeine, which gives the drinker a sense of energy because it stimulates the brain.

16.   Some researchers are looking at ways to stimulate the brain to make new neurons, something thought impossible a few years ago, Ballard said.

17.   The companies are working actively on drugs that stimulate the brain and other organs to grow new cells and repair themselves.

18.   The other treatment is more structured and involves stimulating the brain with various tasks, including challenging computer games and group work.

19.   To keep his brain stimulated, he also takes on a new intellectual challenge about once every five years, among them learning French, statistics and brain biology.

20.   Although the study did not find memories had improved, researchers said estrogen may stimulate the brain to make the type of neural connections typically seen in younger people.