The human body can absorb no more than about a quart of water per hour, beyond which the brain can swell dangerously, says Dr. Goldfarb.

The study found an increased risk of brain damage and cognitive deficits in babies whose mothers were treated with terbutaline during preterm labor.

Using an electronic scalpel, Dr. Liau carefully begins to cut into the brain flesh at the border between the tumor and Corina's Broca's area.