Narrator: This is Science Today. The use of sophisticated MRI scanners is giving researchers new insight into the human brain, particularly the differences between male and female brains. For example, Dr. Louann Brizendine, a psychologist at the University of California , San Francisco, says male brains have larger amygdalas, an almond-shaped set of nuclei located deep within the brain.
Brizendine: The amygdala actually is part of the brain that all of us use constantly. We are always monitoring everything in the room, in our space, in our life and everything for something that might be deeply, emotionally meaningful or fear and danger. Males go from zero to sixty fast.
Narrator: In female brains, the hippocampus, which is called the memory area - is larger than in males.
Brizendine: If you jiggle the amygdala intensely, it sends all of these sparks off to the hippocampus to tell it to take a total snapshot of what's going on right then. And that's one reason the female brain remembers all this emotional detail.
Narrator: For Science Today, I'm Larissa Branin.