Ben Carson is known for his extraordinary work as a brain surgeon for children.

VOA: special.2009.09.04

That same year,doctors discovered a deadly brain tumor, which limited his ability to work.

VOA: special.2009.09.13

Cholinesterase inhibitors may work by protecting a chemical messenger needed for brain activities.

VOA: special.2009.09.15

The psychologist Woodburn Heron wrote about this subject in his nineteen fifty-seven work The Pathology of Boredom. He said that the brain depends on having continuing information from the bodys senses.

VOA: special.2010.02.24

The results of the work, based on brain studies of Denise and other patients,were published in the journal Science.

VOA: standard.2010.01.28

"One should work on this and stop sleeping." Russia has also suffered a serious brain drain since 1991, the report says.

VOA: standard.2010.02.03