Page 54 - Canine Lameness

26 2 Objective Gait Analysis

Linked planar model Segmented planar model Rigid-body segmented model

Three markers for Four markers for Ten markers for
stifle motion stifle motion stifle motion
2D Rotation 2D Rotation and translation 3D Rotation and translation
Rotation: Rotation: Rotation:
• flexion and extension • flexion and extension • flexion and extension
Translation: • internal and external rotation
• craniocaudal translation • abduction and adduction
Translation:
• craniocaudal translation
• mediolateral translation
• dorsoventral translation

Figure 2.8 Comparison of three common kinematic models.

= Marker location Marker locations
= Location of joint angle
Pelvic limb
1. Distolateral aspect of the fifth
metatarsal bone
2. Lateral malleolus of the distal tibia
3. Femorotibial joint, midway
5 6 between the lateral epicondyle of
the femur and the fibular head
4 Shoulder 4. Greater trochanter of the femur
Hip 7 5. Iliac crest
Thoracic limb
3
Stifle 6. Dorsal aspect of the scapular
8 Elbow spine
7. Acromion/greater tubercle of the
2 scapulohumeral joint
Tarsus 8. Lateral epicondyle of the humerus
9. Ulnar styoloid process/ulnar
9 Carpus carpal bone of the carpus
1
10 10. Distolateral aspect of the fifth
metacarpal bone

Figure 2.9 Common kinematic marker location for a 2D linked planar model.