The results, which are reported in a doctoral thesis at the Sahlgrenska Academy, indicate that computerized motion analysis increases our knowledge of how stroke patients can improve their ability to move through rehabilitation.
In the film and video game industry, motion capture technology is used to convert people's movements into computer animations – famous examples include the character Gollum from the Lord of the Rings and Na'vi from the blockbuster film Avatar.
Margit Alt Murphy and her research colleagues at the Sahlgrenska Academy, University of Gothenburg, have brought the technology into the research laboratory.
In a unique study, researchers used motion-capture technology to film everyday movements among roughly one hundred people, both healthy people and people who suffered a stroke.
The 3D animations have provided a completely new level of detail in terms of mobility in stroke patients – knowledge that can help patients achieve more effective rehabilitation.
"Computer technology provides better and more objective documentation of the problem in terms of the everyday life of the patient than what human observation can provide. With 3D technology, we can measure a patient's movements in terms of numbers, which means that small changes in the motion pattern can be detected and can be fed back to the patient in a clear manner," says Margit Alt Murphy.
Simple for patients
The technology is highly advanced, but for the patient, the method is simple.
In the study, the test subjects were equipped with small, round reflex balls on their arm, trunk and head, and they were then instructed to drink water out of a glass. The motion is documented by high-speed cameras whose infrared light is reflected by the balls and sent back to the computer where they create a 3D animated image in the form of a stick figure.
"With 3D animation, we can measure the joint angle, speed and smoothness of the arm motion, as well as which compensating motion patterns the stroke patient is using. This give us a measurement for the motion that we can compare with an optimal arm motion in a healthy person," says Margit Alt Murphy.
"Our study shows that the time it takes to perform an activity is strongly related to the motion quality. Even if this technology is not available, we can still obtain very valuable information about the stroke patient's mobility by timing a highly standardized activity, and every therapist keeps a stopwatch in their pocket," says Margit Alt Murphy.
The dissertation Development and validation of upper extremity kinematic movement analysis for people with stroke - Reaching and drinking from a glass underwent an oral defense on December 6th.Contact:
Münster researchers make a fly’s heartbeat visible / Software automatically recognizes pulse
12.03.2018 | Westfälische Wilhelms-Universität Münster
3-D-written model to provide better understanding of cancer spread
05.03.2018 | Purdue University
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
19.03.2018 | Physics and Astronomy
19.03.2018 | Materials Sciences
19.03.2018 | Event News