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Compensatory Lameness Patterns
Law of Sides
Ipsilateral suggests 1º hind limb lameness - THIS IS TRUE!!!!! WATCH OUT
Contralateral suggests 1º forelimb lameness - This is partly true…
Diff Max Head
the difference in maximum head height that occurs before RF weight bearing compared to before LF weight bearing. Ref range: -6.0 to +6.0 mm
Diff Max Pelvis
the difference in maximum pelvis height that occurs before RH weight bearing compared to before LH weight bearing. Ref range: -3.0 to +3.0 mm
Diff Min Head
the difference in minimum head height that occurs during RF mid stance compared to during LF mid stance. Ref range: -6.0 to +6.0 mm
Diff Min Pelvis
the difference in minimum pelvis height that occurs during RH mid stance compared to during LH mid stance.Ref range: -3.0 to +3.0 mm
If the foot does not create a depression or a divot in the ground, the surface should be considered hard. Hard preset surfaces = asphalt, concrete, packed dirt, gravel/stone, wood, frozen, treadmill, hard synthetic, hard (generic).
The head sensor device contains an accelerometer that tracks vertical head acceleration.
Indications of Severity
Indications of severity are based on a general range of amplitude of lameness, with levels increasing from “very mild”, “mild”, “mild/moderate”, “moderate”, and “moderate/severe”.
**The veterinarian should keep in mind that the severities are a range, and should not be used to compare two trials for consistency of amplitude (such as in establishing a stable baseline between two trials) or to assess change in amplitude (such as before and after a block, or change over time).
quantitative data from the collected trial. Calculated lameness metrics include 1) mean values of Diff Max head, Diff Min head, Diff Max pelvis and Diff Min pelvis; 2) standard deviations for each respective mean Diff Max and Diff Min; 3) Total Diff Head (mean vector sum) of the forelimb data; and 4) The Q Score for both forelimb and hind limb data.
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