11.   Some neurotoxic chemicals, Shaw says, are known to reach the brain this way.

12.   Strokes occur when a clot prevents oxygen-rich blood from reaching the brain through the normal route, arteries.

13.   The American Cancer Society says nicotine reaches the brain within eight seconds of inhaling a cigarette.

14.   The problem is that it takes time for the message of satiety to reach the brain, she said.

15.   The touch signal reaches the brain in a few hundredths of a second while the pain signal reaches the brain a second or two later.

16.   Their illness, missed in its early stages, was allowed to worsen until the infection reached their brains.

17.   When the toxic compound reaches the brain, it kills neurons in the brain stem, which controls heartbeat and respiration.

18.   He had the testicle removed and three weeks later learned that the cancer had reached his brain, requiring more surgery.

19.   In another experiment, the vaccine was again found to reduce the amount of cocaine reaching the brain.

20.   The more fat an animal has, this theory suggests, the more protein reaches the brain.