Movement dysfunctions have significant impact on society because of their influence on the patient's social environment. As a result of this, the restoration of patient mobility by appropriate rehabilitation measures and diagnostics is of upmost importance. Until recently, motional dysfunctions and the success of rehabilitative treatment could only be evaluated qualitatively by medical scientists and therapists. Nowadays however, quantification of motional dysfunction does not only offer improved diagnostic possibilities, but it can also be used for objective evaluation and adaption of therapeutic treatments.

Due to the growing number of people in need of orthopedic intervention, the demand for optimized, conservative interventions which provide quick restoration of physical capacity, has gained further importance. In order to offer patients appropriate individualized treatment for their specific problems, it is necessary to gather information about each functional deficit, making motion analysis and biomechanical examination highly relevant in medicine.

Medics can rely on software to help perform examinations such as the analysis of joint angles and the calculation of kinematics, the centre of mass location and other measurements. With the help of motion analysis, movement images of humans and animals, who are healthy or have problems with movement, can be analysed and temporal motion parameters can be determined in order to describe the movement of the extremities.

Continuous motion analyses are necessary in medicine to objectify the diagnostic and documentation processes of rehabilitation. This is particularly important after surgical interventions, neuronal dysfunctions, long-term diseases, rehabilitation, physical therapy, prothesis use, apoplexia, sports injuries and in various other fields. Our software allows postures and movements to be analysed in detail,  documented and compared. 3D views, graphical representations of motion parameters and biomechanical models faciliate comprehension and analysis. Results can easily be shared with patients, colleagues or health insurance companies. All of these factors allow progress in therapy to be documented and reconstructed objectively.

clinical gait analysis

In a clinical setting the focus lies in quick accomplishment of analyses as part of the daily routine. Both therapists and patients have to be able to apply the results of analysis in clinical evaluation and therapy. The system and its handling should not be in the forefront of therapy, but it has to assist in the process and furthermore it provides objective documentation of the treatment progress. For this reason, the most employed systems in clinical practice are Aktisys, MotionTwin and other less complex Simi Motion systems.


inverse dynamics, kinematics - force vector, rotation

Scientific motion analysis is a tool for the examination, description and  exploration of various movements. It is employed according to the object of interest and the question at hand and there are a range of aims that one may wish to acheive from its application:

•    Comparison of different movements
•    Comparison of different movement patterns
•    Search for the optimal solution
•    Explanation of a movement sequence


Bearing the processes of learning, teaching and optimization in mind, the motion is examined and analysed in detail with reference to its development, composition and structure, as well as the functions of particular motional parts and the connections between them. Thus, scientific motion analysis, in contrast to clinical motion analysis, constitutes a complex illustration and report of biomechanical parameters aimed at accurate analysis and documentation.

Movement analysis systems and methods have a wide range of application. Not only can they be employed in fields such as medicine, sport and industry, but they can also be distinguished by their extensive capabilities and integration for daily use. The graph shown below has been created to aid you in your decision as to which system would best suit your purpose.

Simi movement analysis - comparison of systems

The requirements of the user with regards to the complexity and precision of the data being examined is displayed on the horizontal axis. The vertical axis represents what is required of the user i.e. the amount of training needed to operate the system, the time which would need to be invested in both the collection and analysis of data and the price of the systems. 


In order to select the optimal system for your requirements, you should identify which factors are most important for your purpose, considering factors such as measurement precision, task complexity and how often the software would be used. The following examples should help you in your decision, but if you're unsure we’re happy to advise you about which product might be most suitable.


Scenario 1: If your priority is to examine complex tasks or problems, and the data has to be of high scientific worth, the appropriate system can be found at the very right of the horizontal axis. Your purposes require a comprehensive Motion 3D System, which appears high on the vertical axis, indicating a high budget, increased training needs for both users and analysts, and also a greater time demand. Simi Motion


Scenario 2: If you give precedence to the fast analysis of data and a straightforward operating system, the necessary system can be found at the bottom of the vertical axis. MotionTwin is offered at a lower cost, and requires the least amount of training and analysis time. It is unable to offer an objective, quantitative measure, but it does allow the simultaneous comparison of videos. Simi MotionTwin


Scenario 3: Aktisys and simpler configurations of SimiMotion 2D/3D offer a compromise between the two software packages described previously. They can be integrated into every day use with ease, but also record objective measures of data, allowing direct feedback to both therapists and patients. Very little training is required for operation, and the data produced is reliable. Simi Aktisys

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