Source: DGNews  |  Posted 3 years ago

WASHINGTON, DC -- January 14, 2009 -- Cognitive rehabilitation after a serious brain injury or stroke can help the mind in much the same way that physical therapy helps the body, according to a meta-analysis published in the January issue of Neuropsychology.

Because the data suggest that treatment may work best when tailored to age, injury, symptoms, and time since injury, the findings may help establish evidence-based treatment guidelines.

Researchers from the University of South Alabama, Mobile, Alabama, and the University of North Carolina, Charlotte, North Carolina, analysed and updated the data found in systematic reviews, published in 2000 and 2005, of several hundred studies of cognitive rehabilitation.

The researchers took those studies whose samples and methods were most amenable to rigourous statistical techniques and documented the extent to which various treatments improve the language, attention, memory, and other cognitive problems that appear after acquired brain injury.

The meta-analysis included 97 articles, comprising 115 studied treatment samples and 45 control samples. These samples collectively included 2,014 individuals who underwent cognitive rehabilitation after brain injury and 870 individuals in a variety of control conditions.

The authors of the initial reviews had concluded there was enough evidence to generally support the use of a variety of rehabilitative treatments. To develop specific treatment guidelines, this new analysis documented the extent to which treatment type and timing, origin of the injury, recovery level, and participant age affected the odds of success.

Given the patterns they found, the authors offered initial treatment guidelines:

· Generally, it is better to start treating patients as early as possible, rather than waiting for a more complete neurological recovery.
· Even older patients (>=55 years) may benefit from cognitive rehabilitation, particularly if the brain injury is due to stroke.
· Clinicians should focus their efforts on direct cognitive skills training in specific cognitive domains. More holistic, nontargeted interventions appear to be less effective.

Especially if they were treated soon after the event, language training helped older people after stroke with aphasia, problems producing and/or comprehending language. However, language training was still effective, just not as much, when it started more than a year after the stroke.

Attention training helped people with acquired brain injury and seemed to work best with younger patients less than a year after injury. It was the most specific treatment, improving nothing but attention.

Visuospatial training helped stroke patients with visuospatial neglect. Memory treatment did not produce clear results, nor did comprehensive treatments that attempted to treat cognitive problems holistically.

In addition, the analysis showed that patients treated less than a year after injury did better than those treated more than a year later and older patients tended to improve more after stroke than younger patients improved after traumatic brain injury (TBI). However, because strokes are more common in old age and TBI is more common in youth, further research is needed to disentangle the roles of age and injury type.

Additional research should fill remaining gaps in understanding the effectiveness of and optimising conditions for specific interventions.

SOURCE: American Psychological Association