When it reaches the brain, levodopa is changed into dopamine, the chemical that is lacking in people with the disease.

VOA: special.2009.04.07

The gene is a transporter of serotonin, a brain chemical involved with mood and desire for food.

VOA: special.2009.06.24

"The brain-machine interface is a system that allows disabled people, people suffering from physical disabilities to communicate with external world and also to control devices."

VOA: special.2011.04.04

Doctors do not know exactly how the brain stimulation works to help patients with Parkinson's.

VOA: special.2009.02.03

Researchers say they observed shortages in the brain's reward system in patients with A.D.H.D.

VOA: special.2009.09.29

Brain-computer interface, or BCI,technology could help people with disabilities send commands to machines.

VOA: special.2011.04.04

"We're not dealing with representations in the brain which are primarily auditory.

VOA: special.2011.04.13

These problems were more common among males, those with injured nerve tissue in the brain and those who had been given oxygen supplies for days as a baby.

VOA: special.2010.11.30

Those surviving are often left brain damaged, blind or with hearing loss.

VOA: special.2010.04.20

"There was a lower concentration of dopamine markers in the brain of individuals with A.D.H.D., specifically in the areas of the brain that are involved with reward and motivation."

VOA: special.2009.09.29

They say if mental health care is included in standard care for patients with traumatic brain injury, it could improve their outcome.

VOA: standard.2010.05.25

Bill Campbell,an Iraq war veteran with a 100 percent disability due to concussive brain injury, received a beautiful yellow Labrador called Pax.

VOA: standard.2010.05.18

"She's With Me" was inspired by his eight-year-old granddaughter Haley, who has a rare degenerative brain disorder.

VOA: standard.2009.08.04

Now,with a map of the whole genome in hand, the researchers looked at how individual genes in the adult finch brain respond to singing.

VOA: standard.2010.04.05