ADplot Construction

Right & Left GGDI and GGAI. are the necessary components for the creation of the ADplot.

Stage 1. Calculate GGDI

For a detailed introduction of the concept, the functions and the properties of the GGDI click here.

For a detailed documentation of the calculation procedures for the GGDI click here.

Stage 2. Calculate GGAI

For a detailed introduction of the concept, the functions and the properties of the GGAI click here.

For a detailed documentation of the calculation procedures for the GGAI click here.

By the end of 2nd stage, the three values needed for the ADplot creation have been collected.

Figure 1. Gait Analysis Kinematics Graphs with the respective RGGDI, LGGDI & GGAI.

The three values are the Right GGDI, the Left GGDI and the GGAI. Asymmetry Graphs and Deviation Graphs may also used to to observe the source of the resulted index values

Figure 2. Gait Asymmetry & Deviation Graphs with the respective RGGDI, LGGDI & GGAI.

Stage 3. Construction of the ADplot

The third stage is to use the three calculated values for each gait graph, the Right & Left GGDI together with the GGAI values to visualize their combined effect on an ADplot.

ADplot structure

Figure 3. ADplot structure

• X-axis shows Asymmetry in units of Normal SD
• Y-axis shows Deviation in units of Normal SD
• A green box square area, defines the ultimate normalcy area (1 Normal SD)
  • This box should be considered as the ultimate treatment target where deviation of both sides and symmetry are within the normal range
• A grey rectangular area on at the right end of the green box to the right end of the plot area . This is used to highlight all points within (1 Normal SD) of deviation.
  • In this area are contained motion curves within the normal range . These curves though are part of an asymmetric motion due to the contralateral side increased deviation, that is why they are located outside the green box of normalcy area.
• A diagonal line separates the graph in two sections
  • The up-left section of the graph that contains the more Deviant than Asymmetric values
  • The down-right section of the graph that contains the more Asymmetric than Deviant values.

Basic ADplot

Figure 3. ADplot single subject

In the basic version of ADplot, the indexes of a single gait graph are plotted.

• Right side gait curve indexes are plotted using the O symbol
• Left side gait curve indexes are plotted using the X symbol

Multi ADplot

Multiple Gait Graph Indexes may be plotted in a single ADplot (Multi ADplot).

• Right side gait curve indexes are plotted using the O symbol
• Left side gait curve indexes are plotted using the X symbol

For the Multi ADplots, various labeling conventions may be employed to identify the plotted points.

In Multi ADplots, separate mean values for all Left and Right curves are plotted, marked with an asterisk (*)

sign, to indicated the location of the the mean values of all the indexes included in the ADplot.

The following applications are based on versions of the Multi ADplot type.

• Evaluation of Assymetry& Deviation in the gait analysis report using the TriPlane ADplot
• Overall evaluation of the Pre-Post treatment measurements using the Gait Global ADplot
• Laterality evaluation of a patient using the Laterality Global ADplot
• Visualize the data of a group of measurements plotted as a Group ADplot

Summary ADplot

Multiple Gait Graph Indexes may be summarized in a single point using the calculated mean value of the respective group of indexes. The drawing of the calculated Standard Deviation ranges for the of Asymmetry and Deviation indexes helps to visualize the area that the selected group is spreading. Green error bars are used for the Asymmetry indexes Standard Deviation and Red error bars for the Deviation indexes Standard Deviation.

The following applications are based on the Summary ADplot type.

• Assessment of a subject's gait consistency using the Gait Consistency ADplot
• Pathology Map of Gait Asymmetry & Deviation for a specific group of patients using the Unified Summary ADplot