Page 167 - Adams and Stashak's Lameness in Horses, 7th Edition

Examination for Lameness 133

Table 2.2. Methods of lameness evaluation using pelvic movement.
VetBooks.ir Method of Lameness Evaluation Using Pelvic Movement

Type of Hind Limb Lameness Vertical Pelvic Movement(VPM) Pelvic Rotation (PRM)

Impact Hind Limb Lameness Diff Min Pelvis Hip Hike
Positive for right, negative for left Greater on lame side

Pushoff Hind Limb Lameness Diff Max Pelvis Hip Dip
Positive for right, negative for left Greater on lame side

Compares and contrasts the pelvic movement parameters for both the vertical pelvic movement method (VPM) of hind limb lameness detection as well as
that of the pelvic rotation method (PRM). Diff Min Pelvis is the difference in whole pelvis minimum position between left and right hind limb stance.
Diff Max Pelvis is the difference in whole pelvis maximum position before right hind impact minus whole pelvic position before left hind limb impact.
“Hip Hike” is the greater elevation of the tuber coxae before lame (or more lame) hind limb impact compared to before not lame (or less lame) hind limb
impact. “Hip Dip” is the more lower position of the tuber coxae when the lame (or more lame) limb is swinging forward compared to the low position of
the tuber coxae when the not lame (or less lame) hind limb is swinging forward.

Figure 2.124. Two methods of hindlimb lameness detection curve (green) indicates dorsal pelvic movement through four
and evaluation. Vertical pelvic movement method evaluates strides of horse with left hindlimb lameness with black circle at time
imaginary “ball” on midline of pelvis between the tuber sacrale. of sound (right) hindlimb stance (synchronous with picture). Pelvic
Pelvic rotation method evaluates imaginary “balls” located at left rotation method relies on greater total vertical movement of the
and right tuber coxae. Vertical pelvic movement method relies on tuber coxae on the lame hindlimb side. Curve on left (black)
temporal asymmetry of movement of entire pelvis, with less indicates left tuber coxae vertical movement through four strides in
downward movement of the pelvis (pelvis stops downward horse with left hindlimb lameness with black circles at time of
movement at higher height) during stance phase of lame limb and/ sound (right) hindlimb stance (synchronous with picture). Curve on
or less upward movement of the pelvis (pelvis stops upward right (red) indicates right tuber coxae vertical movement through
movement at lower height) after pushoff of the lame limb, depend- four strides in horse with left hindlimb lameness with black circles
ing on whether the lameness is impact or pushoff or both. Top at time of sound (right) hindlimb stance (synchronous with picture).