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kinematic_model [2021/02/20 21:24] – [Kinematic models] oliverkinematic_model [2023/08/07 00:05] (current) – [Classical SHR ratio] oliver
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 ====== Kinematic models ====== ====== Kinematic models ======
 The Upperlimb Software is a full featured modelling software with the focus on upper extremity kinematic modelling. Lots of different models are implemented in the Heidelberg gaitlab and can be combined or adapted. A typically application has its specific needs and existing models have to be adapted. There are two main modelling approaches, which correspond to three different models, you can start with: 1. The HUX model, 2. an implementation of the recommendations of the ISB and 3. a combination of both. The Upperlimb Software is a full featured modelling software with the focus on upper extremity kinematic modelling. Lots of different models are implemented in the Heidelberg gaitlab and can be combined or adapted. A typically application has its specific needs and existing models have to be adapted. There are two main modelling approaches, which correspond to three different models, you can start with: 1. The HUX model, 2. an implementation of the recommendations of the ISB and 3. a combination of both.
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-A model is applied on kinematic data which can be collected by a markerbased motion analysis system, by inertial or other type of sensors. The described three default models are build to process markerbased motion data. they are tested extensively with the //Vicon// system especially the deprecated software //Vicon workstation// and it current pendant //Nexus// and also the software Tracker which is mainly used in the context of robotics sciences. 
  
 ===== HUX model ===== ===== HUX model =====
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 **The details of the original model are described here:** **The details of the original model are described here:**
  
-{{pubmed>long:19651514}}+{{pmid>long:19651514}}
          
 **The angles to describe shoulder girdle movement are described here:** **The angles to describe shoulder girdle movement are described here:**
  
-{{pubmed>long:26646907}}+{{pmid>long:26646907}}
  
 {{:fig2.jpg?650|}} {{:fig2.jpg?650|}}
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 **Shoulder internal/external rotation is described by a specific angle definition, called conjunct rotation as described here:** **Shoulder internal/external rotation is described by a specific angle definition, called conjunct rotation as described here:**
  
-{{pubmed>long:19396487}}+{{pmid>long:19396487}}
  
 ====Marker placement==== ====Marker placement====
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 A detailed description of the angles (also several variants are available) is published here: A detailed description of the angles (also several variants are available) is published here:
  
-{{pubmed>long:15844264}}+{{pmid>long:15844264}}
  
 ==== Tip positions ==== ==== Tip positions ====
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 For this RoM the maximum error should be less than 8 degrees in all cases. That is higher than for the other upper extremity joint angles but it sounds worse than it is because typical daily life arm movements have variabilities in the same order. There are several publication about accuracy, e.g.: For this RoM the maximum error should be less than 8 degrees in all cases. That is higher than for the other upper extremity joint angles but it sounds worse than it is because typical daily life arm movements have variabilities in the same order. There are several publication about accuracy, e.g.:
  
-{{pubmed>long:26099159}} +{{pmid>long:26099159}} 
-{{pubmed>long:24856913}} +{{pmid>long:24856913}} 
-{{pubmed>long:21875756}} +{{pmid>long:21875756}} 
-{{pubmed>long:18815043}}+{{pmid>long:18815043}}
  
 ==== Angles ==== ==== Angles ====
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 Typically the SHR is given as the ratio of the glenohumeral abduction angle and the scapula medio-lateral rotation angle during humeral abduction movements (movement mainly in frontal or scapula plane). In many publications, due to technical reasons, the glenohumeral abduction angle is determined from the thoracohumeral abduction angle by subtracting the scapula medio-lateral rotation angle. All of these angles can be defined by cardan sequences or by projection angles. Typically the SHR is given as the ratio of the glenohumeral abduction angle and the scapula medio-lateral rotation angle during humeral abduction movements (movement mainly in frontal or scapula plane). In many publications, due to technical reasons, the glenohumeral abduction angle is determined from the thoracohumeral abduction angle by subtracting the scapula medio-lateral rotation angle. All of these angles can be defined by cardan sequences or by projection angles.
  
-{{pubmed>long:27583116}}+{{pmid>long:27583116}}
  
 Typically the SHR ratio is presented as a function of the humeral elevation.   Typically the SHR ratio is presented as a function of the humeral elevation.  
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 elevation.  elevation. 
  
-{{pubmed>long:25591459}}+{{pmid>long:25591459}}
  
 This is a different measure, which results in different numerical values, for the so called SHR ratio but it is robust against angle-offsets. A numerical feature of this definition is, that it can be implemented a way that the measure does not depend on the rotation order of the cardan angles. This is a different measure, which results in different numerical values, for the so called SHR ratio but it is robust against angle-offsets. A numerical feature of this definition is, that it can be implemented a way that the measure does not depend on the rotation order of the cardan angles.
kinematic_model.1613852643.txt.gz · Last modified: 2021/02/20 21:24 by oliver

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