41.   It involved a battery of nine widely accepted psychological tests of brain function.

42.   It makes you wonder, the idea that football players who have suffered numerous concussions may experience diminished brain function.

43.   It may also play a role in some brain functions.

44.   It is plausible that altering secretin levels could affect brain function.

45.   It was the timing that undid the legal preparations of a woman who wished to be allowed to die if she had no brain function.

46.   It will take years of testing in hundreds of patients to be sure that the idea actually helps preserve brain function.

47.   Lead is toxic to the nervous system, causing loss of brain function and changes in behavior.

48.   More oxygen means improved brain function.

49.   Neuro-biofeedback, which uses light and sound to help stimulate certain brain wave- activity that is supposed to strength brain function, is somewhat controversial.

50.   Most researchers using the new imaging are not asking difficult questions about brain function, these critics say.