THURSDAY, April 7 (HealthDay News) -- Playing video games while
recovering after a stroke appears to promote arm strength and
function, Canadian researchers find.
"Stroke rehabilitation is rapidly evolving. Novel approaches -- including the use of virtual reality [gaming] systems -- may help improve motor impairment, activities and social participation," said lead researcher Dr. Gustavo Saposnik, director of the Stroke Outcomes Research Unit at St. Michael's Hospital at the University of Toronto.
"Virtual reality may provide an affordable, enjoyable and effective alternative to intensify treatment and promote motor recovery after stroke," he added.
Up to 75 percent of stroke patients experience motor problems,
including weakness, paralysis or difficulty with balance and
coordination that can affect their quality of life. Conventional
therapy provides only "modest and sometimes delayed effects" in
treating these disorders, according to Saposnik.
The new study findings are published in the April 7 online
edition of the journal
To find out whether video games could play a role in stroke
rehabilitation, Saposnik's team performed what is called a
meta-analysis. In this type of study, investigators search the
published literature to find studies related to the theory they are
interested in testing. They then pull data from these studies and
pool the results to come up with a conclusion.
In this case, they found 12 studies that included a total of 195
patients, aged 26 to 88 years, who had suffered a mild to moderate
stroke. Each study reported the effects of electronic games on
upper arm strength and function.
Of these studies, seven were observational and five were
randomized trials. Observational studies are those in which
researchers observe behavior but without trying to influence
behavior or the outcome -- such as comparing smokers with
Randomized trials are ones where similar patients are randomly
assigned to a certain treatment group -- such as playing video
games -- while others are assigned to a different kind of group.
These trials look for a specific outcome over a certain period of
Among stroke patients in observational studies, those playing
virtual reality games improved their upper arm strength by 14.7
percent and motor function -- or the ability to perform standard
tasks -- by 20 percent.
Those in the randomized trials who played virtual reality games
had a 4.89 times greater chance of improving arm strength, compared
with those did not play these games but had standard
rehabilitation, the researchers found.
Treatment varied in each study, however, most patients played 20
to 30 hours over four to six weeks of therapy, the authors noted.
The systems used included three traditional video game systems
(Glasstron, IREX, PlayStation Eye Toy) and nine virtual reality
systems (including Virtual Teacher, CyberGlove, VR Motion,
PneuGlove and Wii).
Saposnik also noted that some studies looked at video gaming
used in addition to standard therapy, something he said may have
skewed the results somewhat in favor of the new therapy.
Video gaming may help stroke patients because of the brain's
unusual potential for remodeling, in which it creates new nerve
cell connections, some studies suggest. What is needed for such
remodeling, recent research indicates, is training that is
challenging, repetitive, task-specific, novel and motivating -- all
hallmarks of virtual reality games, which can also give immediate
"Our study confirms the potential benefit of virtual reality in stroke rehabilitation identified in small studies," Saposnik said. "Further larger randomized trials are needed before changing practice. However, we are [going] in the right direction," he added.
Commenting on the study, Dr. Ralph L. Sacco, president of the
American Heart Association and chair of neurology at the University
of Miami Miller School of Medicine, said, "This is provocative
information that should move us toward larger randomized trials to
evaluate the impact of virtual reality in stroke rehab."
Sacco added that many stroke patients don't get into rehab
programs and might benefit from "innovative outpatient rehab
However, he is cautious about recommending virtual reality games
as part of rehabilitation based on the meta-analysis.
"It's still premature today to have patients go out and buy virtual reality video games to improve motor function," Sacco said. "The message is still that continued rehabilitation exercises on your own still help months, even years, after a stroke."
For more information on stroke, visit the
U.S. National Institute of Neurological Disorders and
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