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9
EQUINE MATTERS
Kissing spines
in horses
Anatomy
The thoracic and lumbar vertebrae of the
back each have a bony projection extending
upwards from the main bone which surrounds
and protects the spinal cord. These
projections are known as dorsal spinous
processes (DSPs). Kissing spines occurs
when the position of the bones of the back
alters and the back, very slightly, flattens and
lowers towards the ground. DSPs come closer
together and impinge on each other in some
horses, which results in inflammation and
pain.
Clinical signs
Most back pain is likely to be slow or
gradual in its onset, so it may be difficult to
pinpoint any single incident, for example, a
fall at a fence, which then subsequently
caused back pain.
The signs may be subtle, such as difficulties
with transitions, or reduced jumping ability.
More severe cases may show resentment
when saddling, girthing, mounting and
the horse may make attempts to throw the
rider off.
Colin Mitchell BVM&S CertEP MRCVS,
Scott Mitchell Associates
Veterinary surgeon
Colin Mitchell
XLEquine practice
Scott Mitchell
Associates
KISSING SPINES
Kissing spines, also known as over-riding or impinging dorsal
spinous processes, is a common diagnosis in horses with back
pain. The exact cause and mechanism of the condition is not
fully understood. Medical and surgical treatments are available.
Most horses will return to full athletic function after treatment.
Figure 1 – Needle in place between DSPs prior to steroid injection