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amputee who suffer from phantom - limb pain could get some relief , thanks to a potential new observational treatment involve virtual reality .
One man who suffered severephantom painfor 48 years after his branch was amputate report a dramatic reduction in his pain sensation after the experimental discourse , in which bespeak from his limb rostrum controlled a virtual realness subdivision , consort to a case study detailed today ( Feb. 25 ) in the diary Frontiers in Neuroscience .
In the augmented reality environment, the patient can see himself with a superimposed virtual arm, which is controlled by muscle signals from his arm stump.
The therapy is anticipate , but will need to be tested in hold in clinical trials with more affected role to demonstrate its efficaciousness , scientists say .
After people lose an arm or a leg , they often have painful sensations of their missing limb , acknowledge as phantom painful sensation . As much as 70 percent of amputee experience phantom pain sensation , which can be chronic and debilitating . The pain ’s causes are unidentified , but may ensue fromremaining brain representationof the miss limb .
" Phantom - limb pain is very common in amputees , " said study research worker Max Ortiz Catalan , a doctorial educatee in biomedical engineering at Chalmers University of Technology , in Sweden . " Unfortunately , today there is no individual treatment that works for everybody . “[SeeVideo of Amputee Using Virtual world System ]
Current treatments for phantom nuisance include drugs , stylostixis , hypnosis and " mirror therapy , " which involves an amputee grade their entire tree branch inside a box with two mirror place so the normal limb appear where the amputated limb should be . The reflexion in the mirrors tricks the genius into thinking the think over arm is the missing one . Mirror therapy has show some effectivity in lowly studies , but remains controversial .
Controlling a virtual weapon
In the new sketch , Ortiz Catalan and his colleagues educate a therapy that involves augmented realness , and tested it on the man , whose phantom pain had n’t responded to other treatment .
Electrodes record muscle signals from the stump of the patient ’s arm , and used software to convert those signals into move of a practical arm , superimposed over a video recording of the patient carry with a webcam . By thinking about move his missing sleeve , the patient was capable to control the virtual arm , using it to perform tasks such as driving a simulated railroad car in a racing biz .
The patient describe that his pain gradually decoct , and he experienced painfulness - detached periods over the row of hisvirtual realitytreatments . He said his handwriting changed from feeling sorely clenched to feeling opened and relaxed .
In contrast to mirror therapy or practical realness systems that are controlled by the entire tree branch , the new system uses signals from the damaged branch itself , so it could also be used by bilateralamputees , the researcher said .
One of braggart problems with traditional rehabilitation is that patients do n’t discharge their therapy , Ortiz Catalan told Live Science . The new virtual realness therapy would be more fun and piquant , he said .
Clinical studies needed
The use of residual muscle natural process to verify a virtual arm is n’t whole new , enunciate Tamar Makin , a neuroscientist at Oxford University , in England , who studies phantom pain but was not involve in the subject . research worker have also used brawniness signals from a limb stump to ascertain prosthetic limbs .
Makin praised the employment , but said it was difficult to draw conclusions about the treatment ’s effectiveness until a controlled study with more patient role can be done .
The Chalmers University researcher plan to run such a sketch , in coaction with Sahlgrenska University Hospital , the University of Gothenburg and the aesculapian technology company Integrum .
Meanwhile , the research worker have developed a version of the system of rules that can be used at home , once it is approve . Patients who have restrain mobility because of a shot or spinal cord injury might also do good from the therapy , the researchers read .
