## Encyclopedia

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

**ALL**

## P |
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## Pelvic SensorThe pelvic sensor device contains an accelerometer that tracks vertical pelvic acceleration. | ||

## R |
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## S |
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## Soft SurfaceIf the foot creates a depression or a divot in the ground, the surface should be considered soft. Soft preset surfaces = loose sand, grass/turf, soft/deep, mud, soft synthetic, soft (generic). | ||

## Stabilizing the Lameness
- When beginning an evaluation, it is advised to perform two straight line trials one after the other to confirm results, and, if lameness present, a stable lameness.
- Horses fresh out of a stall or off of a trailer may not always show a stable lameness on the first evaluation.
- There is also a small window of expected trial-to-trial variability. However, significantly different results between two trials are indicative of an unstable lameness.
- If two trials back to back do not yield similar results in limb, timing, and amplitude, it is recommended to exercise the horse, such as lunging, for a few minutes and evaluate again.
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## Stride Plotthe graphical representations of the trial data. | ||

## Stride-by-stride variabilitythe variability of the lameness measure (Diff Max Head, Diff Min Head, Diff Max Pelvis, Diff Min Pelvis) from stride to stride over the course of a single data collection trial. Stride-by-stride variability is assessed in the Lameness Locator® report by comparing the standard deviation to the absolute value of the mean for that measure. If the standard deviation is significantly greater than the mean (currently this is arbitrarily set at 120% of the mean), the confidence in, or strength of evidence for, lameness (in limb, amplitude and/or timing) is reduced. | ||

## T |
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## The Quantification (Q) Scorethe Q score is a summary of the side, timing and amplitude of the asymmetry. - There is one Q score for forelimb and a combined Q score for hind limb (one for the pushoff component and one for the impact component).
- Note that Q Scores have no +/- sign. The limb and timing in stride cycle is described directly – i.e. L/R (for Left or Right) and Imp/Mid/Push (for Impact, Midstance, or Pushoff) in forelimb and Imp or Push for hind limb.
**Q Scores do not assess variability.**The user should still inspect lameness metric standard deviations (or the Trial AIDE statements) to understand the stride by stride consistency of asymmetry, which contributes to the overall evidence of lameness.
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## Total Diff Head (Vector Sum)Can be considered the amplitude of total head movement asymmetry, taking into account both Diff Max and Diff Min of the head. As the side and timing of forelimb lameness is dependent upon both Diff Max Head and Diff Min Head, this single variable can be more easily used to estimate the overall level of forelimb lameness. Total Diff Head is the Vector Sum of the mean Diff Max and mean Diff Min values, and is calculated using Pythagorean Theorem (a The Total Diff Head (Vector Sum) reference range is 0 to 8.5mm. The upper reference range value of 8.5 is derived from the VS calculation when Diff Max Head and Diff Min Head are at their upper reference range values of |6|. 6 | ||

## Trial MetadataOwner, horse, and trial specific data (including date, time and type of trial conducted). | ||

## Trial-to-trial variabilityTrial-to-trial variability = the variability of the mean lameness measure between two trials. I.e. is the measure repeatable? Trial-to-trial variability is assessed by comparing the lameness measures between two trials and whether they are within the 95% confidence intervals of repeatability. If a particular measure in two back-to-back trials is not within the 95% CI, then that lameness is not stable. | ||