1.   Understanding these latter effects requires a brief look at the brain circuits of bliss.

2.   Brain circuits that carry leadership habits have to unlearn the old ones and replace them with the new.

3.   A brain circuit involved in decision-making is activated, again out of conscious awareness.

4.   But once a brain circuit is laid down, subsequent repetitions tend to reinforce it.

5.   Children internalize those reactions in emotional brain circuits, he said.

6.   Is it a problem with just the cell types in the medial geniculate or a broader malfunction involving larger brain circuits?

7.   It flows from the impact of memories and life events on those brain circuits.

8.   Prozac, which increases the amount of serotonin sloshing around brain circuits, seems to reduce the compulsivity of autism.

9.   Such behaviors, they say, rely on brain circuits that evolved to help animals assess rewards important to their survival, like food and sex.

10.   The areas that show low metabolism may be riding on top of permanent deficits in wider brain circuits, he said.