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:
A first look at interstitial fluid flow in the brain
05.07.2018 | American Institute of Physics
A sentinel to watch over ocular pressure
04.07.2018 | Fraunhofer Institute for Microelectronic Circuits and Systems
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences