Page 140 - Adams and Stashak's Lameness in Horses, 7th Edition

106 Chapter 2

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Figure 2.78. This young horse had a history of previous trauma
to the tarsus. Part of the swelling was firm and painful to palpation,
but there was also effusion within the tarsocrural joint.

Figure 2.76. Atrophy of the shoulder muscles in young horses is
often seen with osteochondrosis of the shoulder joint.

Figure 2.79. Effusion of the tarsal sheath on the medial aspect
of the tarsus that was associated with fragmentation of the
sustentaculum tali.
proliferation associated with the distal tarsal joints (bone
spavin) (Figure 2.81). In the normal horse there is a
smooth contour that tapers to the distal tarsal bones as
they join the proximal metatarsus. This is easily visualized
from the rear and palpated from the side. If this region
appears boxy with obvious enlargement, OA of the distal
intertarsal and/or the tarsometatarsal joints should be
suspected. These medial enlargements have also been
referred to as “tarsal shelves” (Figure 2.82). Applying
pressure over the medial aspect of the distal tarsus has
been referred to as the Churchill pressure test. Using the
Figure 2.77. Young horse with effusion of the tarsocrural joint index and middle fingers, firm pressure is applied to the
that is easily compressible and nonpainful (white arrows). plantar aspect of the proximal end (head) of the second