A University of Washington study has found greater than expected specialization in the activity of individual brain cells. A possibly related brain mapping study of blind braille readers from Vaderbilt reveals that the human brain is much more flexible than previously thought. A study of ASL users has discovered evidence that there is a critical period for aquiring non-verbal languages, similar to that for aquiring verbal ones. A Princeton study reports that the brain must discard old memories to make way for new ones. And finally, a UCLA study reports altered brain functioning in people who respond favorably to placebos given in treatment for depression.