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Use of sample entropy to study equine gait lameness.
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Date
2017-08-21Author
Rane, Amey
Type of Degree
Master's ThesisDepartment
Mechanical EngineeringMetadata
Show full item recordAbstract
Administration of a sedative is occasionally required to perform a nerve or joint block
in the horse during the course of a lameness examination. Because sedatives have analgesic
properties, we investigated as to whether a sedative could ameliorate lameness. An improvement
in gait after administration of a sedative could erroneously be attributed to a nerve
or joint block performed at the same time. This study used a computerized gait analysis
system (Lameness Locator) to objectively examine the effects of the sedative detomidine on
the gait of naturally lame horses. The gait analysis system measures symmetry of motion.
Sound horses have a symmetrical gait at the trot and lameness causes asymmetry, which is
detected and quantified by the Lameness Locator. We utilized calculation of Sample Entropy
to determine the complexity of system. The horses were trotted in a straight line and
evaluated using inertial sensors. A trend in dynamic stability was observed with calculation
of Sample Entropy of recorded head and pelvic acceleration data. At first the study between
the lame and sound horse proved increase in sample entropy. Stability was unaffected after
administration of sedatives, which is shown by statistically insignificant entropy value
change.
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