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Featured Article
Keeping your finger on the pulse in the world of detox is imperative. It could make all the difference on the intended outcome. Bridging the gap between 'generally knowing' and 'really knowing' all about detox is what this article is about.Stroke Rehabilitation: A Novel Treatment Pays Off
Investigators at the University of Alabama at Birmingham made a convincing case that an unconventional form of stroke rehabilitation is the real thing. In a landmark study, researchers at the University of Alabama at Birmingham used a randomized controlled trial -- the gold standard method for evaluating the effectiveness of a treatment -- to show that immobilizing the good arm of stroke patients and intensively exercising the weakened arm actually improved recovery, even when performed long after the stroke occurred. At one level, randomized controlled trials in the field of rehabilitation medicine have been so rare that the publication of each and every one should be applauded. At another level, the outcome of this study is so satisfying in terms of what we think we know about brain physiology (function) that even if the results turn out not to be true, they ought to be.
A controlled trial is one in which there is a comparison group of patients that is either untreated or is treated differently. When a controlled trial is also randomized, it means that upon entering the study, participants agree to be assigned to one group or the other based on the equivalent of a coin-toss. Randomization eliminates bias that might otherwise come from (knowingly or unknowingly) assigning more promising patients to one group and less promising patients to the other.
Publishing their results in the March 2006 online issue of Stroke, a medical journal, Edward Taub, PhD, and co-workers studied 21 patients treated with "constraint-induced movement therapy" (CI) and compared their outcomes to another 20 stroke patients who received placebo treatment. In strokes a loss of circulation damages a portion of the brain, resulting in impairment of whatever mental or bodily function that part of the brain controls. Strokes often cause weakness in an arm with or without concurrent numbness. Strokes are the leading cause of long-term disability in the U.S.
The researchers included stroke victims in their study who had mild to moderate impairment in use of their affected arms, but excluded those with severe impairment. The research subjects varied widely in age, averaging in their fifties. The investigators selected patients whose stroke had occurred a minimum of one year earlier with an average interval between stroke and treatment of 4.5 years. Patients with concurrent numbness were included, but those with poor walking or balance were excluded, as were patients with excessive confusion or too much additional impairment caused by other medical conditions.
The CI treatment was administered over a 2-week span, during which the good arm was immobilized about 90% of the time with an arm-sling and a hand-splint. CI patients had 10 weekday sessions with therapists, lasting 6 hours each. During those sessions, patients received one-on-one therapy that was individualized to their needs and abilities and involved specific, practical tasks of gradually increasing difficulty. The therapists praised patients each time their performances improved even just slightly. By contrast, placebo-treated patients received a more general program of physical fitness, cognitive and relaxation exercises over the same schedule.
The abilities of CI and placebo-treated patients were compared in two main ways. In one, the research subjects were videotaped in the laboratory while attempting specific tasks like holding a book, picking up a glass and brushing teeth. Their performances were rated by viewers who were purposely not told which treatment the subject received. The other rating, called the "real world outcome," came from structured interviews of the patients and their caregivers concerning performance outside the treatment facility.
The researchers found significant improvements in CI-treated patients compared with both their own initial abilities and those of patients receiving placebo treatment. The CI patients showed a moderate improvement in their laboratory skills and a large improvement in use of the affected arms in their daily lives. Improvement was still evident 4 weeks after treatment, and even after 2 years in the 14 of 21 CI patients who could be retested at that time.
The researchers interpreted the improvement as due to two factors. The first factor, probably more important for faster gains, was in overcoming "learned non-use" of the weaker arm. The idea is that after a stroke, patients quickly learn to avoid using the weaker arm to a greater extent than its impairment might warrant, and CI training forces them to put it back into action. The second suspected factor, developing more slowly, was "neural plasticity" or actual rewiring of the brain. In neural plasticity surviving brain cells -- previously uninvolved or less involved in controlling use of the arm -- attempt to make up for the lost brain cells either by creating new contacts with other brain cells or by modifying the effectiveness of existing links.
In 1992 researchers at the Hammersmith Hospital in London used positron emission tomographic (PET) scans to examine patterns of brain use in stroke patients. PET scans are good at showing which parts of the brain are most engaged by specific tasks. Investigators compared PET scans in 10 patients who recovered from a stroke to those of 10 patients who never had a stroke. In this study subjects repeatedly moved one hand (which in the stroke patients was the affected hand) while their brains were being scanned. Compared to non-stroke patients, stroke patients used more areas on both sides of the brain to perform the requested movements, as if the surviving brain cells were trying to fill in for their fallen comrades.
Taub and collaborators at the National Institute of Neurological Disorders and Stroke used similar methods to compare patterns of brain activation in 9 CI-treated stroke patients with those in 7 less-intensively treated stroke patients. In this 2003 study, CI-treated patients showed a shift in the extent to which different parts of the brain participated in moving the fingers of the weakened hand. Thus CI treatment seemed to modify the brain pathways responsible for the finger movements.
(C) 2006 by Gary Cordingley
ABOUT THE AUTHOR
Gary Cordingley, MD, PhD, is a clinical neurologist, teacher and researcher who works in Athens, Ohio. For more health-related articles see his websites at: http://www.cordingleyneurology.com and http://www.neurologyarticles.com
This article is courtesy of http://www.rehab-info.com
You may freely reprint this article on your website or in your newsletter provided this courtesy notice, the author name and URLs remain intact and clickable.
We do hope that you find the information here something worth recommending others to read and think about once you complete reading all there is about detox. Writing is an art that has to be practiced through the heart. And it is through this heart that I had written this article on detox.
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