1.   Could there be a more splendid way to get the grey matter working?

2.   It just requires a little time and activity from the old grey matter.

3.   She wondered if she could think with what was left of her grey matter.

4.   While away those dark winter evenings and exercise the grey matter at the same time!

5.   ...an unsolved mathematical equation which has caused his grey matter to work overtime.

6.   Engineers have a good helping of functional grey matter with which to devise theories.

7.   There is considerable grey matter to consider.

8.   Collins said doctors found that scar tissue from a previous injury, sandwiched between the grey matter of the brain and skull, had probably hardened.