Page 1057 - Adams and Stashak's Lameness in Horses, 7th Edition

Occupational‐Related Lameness Conditions 1023

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Figure 9.60. (Left) Attempt to measure lameness with inertial right hindlimb lack of pushoff and lack of impact are measured
sensors in a Missouri Foxtrotter led by a handler. Note: There is no during foxtrot under saddle.
consistent hindlimb asymmetry measured. (Right) Consistent mild

Figure 9.61. Inertial sensor data (A) from pacer that is jogging limb is lame. (B) When same horse is pacing at speed. Note: Clear
in hobbles. Note: No clear forelimb lameness, pushing off less in left right forelimb lameness with compensatory left hindlimb lameness.
hind and coming down less in right hind. Difficult to decide which

in mild lameness after blocking. Because the rack is an fall, so they will be OK for forelimb, but hindlimb results
ipsilateral gait, using currently available Lameness may not be reliable.
Locator® software, the hindlimb lameness results must
be flipped for the rack. However, this is of little conse­ Paso Finos (Classic, Corto, Largo)
quence because most American Saddlebreds trot readily,
such that evaluation for lameness at the rack is usually Because the footfall cadence is LH‐LF‐RH‐RF, similar
not required (Figure 9.62). to the walk, the algorithms used in Lameness Locator
Lameness Locator has been tested in the Missouri will have trouble discerning the side of hindlimb lame­
Foxtrotter, Standardbred Pace, and American Saddlebred ness. Forelimb evaluation will likely be accurate in the
Rack. Based on these findings and clinical observations largo, but hindlimb results may be unreliable at all three
in these and other gaits, the following general guidelines gaits. The classic is a poor gait to evaluate lameness as
can be made for some other common gaited breeds. the torso is not really moving up and down. It is primar­
ily only the legs moving with no upper body movement.
It is like the horse is doing the Irish jig.
Tennessee Walking Horse and Rocky Mountain Horse
Running Walk
The Icelandic Tölt and Flying Pace
These ambling gaits do not have a small extra dura­
tion between second and third footfalls needed to dif­ The tölt is a four‐beat lateral ambling gait and will
ferentiate contralateral from ipsilateral hindlimb foot likely be measured similarly to the Saddlebred rack or