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--- visual3d:tutorials:modeling:plug-in_gait_lower_limb [2025/10/20 19:12] – wikisysop
+++ visual3d:tutorials:modeling:plug-in_gait_lower_limb [2026/02/03 18:34] (current) – [Introduction] wikisysop
@@ Line 1: / Line 1: @@
 ====== Plug-In Gait Lower Limb ======
-**In it's current form, the segment's definitions (coordinate systems) are exactly those of the Plug-In Gait model in Visual3D. It is however not possible to obtain the //exact// same results as those generated using Vicon's Nexus software due to the use of different [[Visual3D:Documentation:Kinematics_and_Kinetics:Pose_Estimation|pose estimation]] methods in Visual3D.**
+**In it's current form, the segment's definitions (coordinate systems) are exactly those of the Plug-In Gait model in Visual3D. It is however not possible to obtain the //exact// same results as those generated using Vicon's Nexus software due to the use of different [[Visual3D:Documentation:Kinematics_and_Kinetics:Pose_Estimation|pose estimation]] methods.**
-**NOTE:** This tutorial has been updated. The original format can be found [[Visual3D:Documentation:Modeling:Marker_Sets:PiG_LL_Original|here]].
 ==== Introduction ====
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 To see an example of a modified definition for the Plug-In Gait Lower Limb model to compensate for errors in marker placement, see this [[:plug_gait_lower_limb_modified|tutorial]].
+A video version of this tutorial can be viewed [[https://youtu.be/Pp8wqqM98L0|here]].
 ==== Pose Estimation ====
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 **Foot Marker Placement Considerations**
-The foot is visualized as a line along the long axis of the foot from the 2nd metatarsal heads and the ankle joint center projected onto the plantar surface of the foot.\\ \\ The forefoot (toe) marker (RTOE, LTOE) is placed on the dorsal aspect on the 2nd metatarsal heads proximal to the MP joint (on the mid-foot side of the equinus break between forefoot and midfoot). Care should be taken in feet with midfoot breakdown or collapse. The placement of this marker should be proximal to the deformity to avoid exaggerating dorsiflexion in stance.\\ \\ The heel marker (RHEE, LHEE) is placed on the calcaneous where the medial/lateral position is in line with the ankle joint center. In a plantargrade foot, the heel marker is at the same height above the plantar surface of the foot as the toe marker. For a non-plantargrade foot as well as shoe/brace conditions, the height of the heel marker must be placed so that the line from the heel to toe (when viewed from the sagittal plane) is parallel to the plantar surface of the foot.\\ \\ **Note that inversion/eversion of the foot cannot be measured reliably with any Conventional Gait Model without any enhancement to the foot marker set**\\ \\ See [[Visual3D:Tutorials:Modeling:Building_a_Conventional_Gait_Model#Enhancing_the_Foot_Segment|Enhancing the foot segment]] for more detail.
+The foot is visualized as a line along the long axis of the foot from the 2nd metatarsal heads and the ankle joint center projected onto the plantar surface of the foot.\\ \\ The forefoot (toe) marker (RTOE, LTOE) is placed on the dorsal aspect on the 2nd metatarsal heads proximal to the MP joint (on the mid-foot side of the equinus break between forefoot and midfoot). Care should be taken in feet with midfoot breakdown or collapse. The placement of this marker should be proximal to the deformity to avoid exaggerating dorsiflexion in stance.\\ \\ The heel marker (RHEE, LHEE) is placed on the calcaneous where the medial/lateral position is in line with the ankle joint center. In a plantargrade foot, the heel marker is at the same height above the plantar surface of the foot as the toe marker. For a non-plantargrade foot as well as shoe/brace conditions, the height of the heel marker must be placed so that the line from the heel to toe (when viewed from the sagittal plane) is parallel to the plantar surface of the foot.\\ \\ **Note that inversion/eversion of the foot cannot be measured reliably with any Conventional Gait Model without any enhancement to the foot marker set.**\\ \\ See [[Visual3D:Tutorials:Modeling:Building_a_Conventional_Gait_Model#Enhancing_the_Foot_Segment|Enhancing the foot segment]] for more detail.
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