A comparison of ground reaction forces during level and cross-slope walking in Labrador RetrieversReportar como inadecuado




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BMC Veterinary Research

, 10:241

Musculoskeletal disorders and orthopaedics

Abstract

BackgroundInclined or slippery surfaces and various other types of obstacles are common demands in our environment. Dogs with impaired locomotion might have difficulties to manage rough terrain. Gait analyses using force plates or pressure plates, which are well established to characterize limb loads in human medicine as well as in animals, are mostly limited to level surfaces. Therefore, the aim of this study was to investigate the effect of cross-slope walking in ten healthy Labrador Retrievers using a pressure plate walkway system. The dogs walked over the pressure plate on a level surface, with a lateral elevation angle of 10° CS1 or 15° CS2 until five valid trials were achieved. Three measurements were obtained at weekly intervals. Peak vertical force PFz, vertical impulse IFz, step length, and velocity were determined.

ResultsCompared to level walking LW, cross-slope walking was associated with a significant decrease in GRF of the up-slope US hindlimb, which was compensated for by the down-slope DS forelimb. The other diagonal limb pair showed less pronounced effects during CS1, but in CS2 more weight was shifted onto the DS hindlimb during the first two measurements, thus reducing weight on the US forelimb for IFz. The effect diminished from trial to trial, with GRF values approaching LW standards finally. The IFz was a more sensitive measure than the PFz. The step length of the DS forelimb was significantly decreased in both cross-slope conditions, while the step length of the US forelimb only decreased during CS2.

ConclusionsThe dogs adapted their gait pattern and step length to compensate for the discrepancy in apparent leg length caused by the cross-slope. The results suggest that cross-slope walking requires functional musculoskeletal adaptations that may be difficult for animals with impaired locomotion. Further, this knowledge might be of clinical impact for early diagnosis of neurological disorders, mild lameness and proprioceptive deficits.

KeywordsCross-slope Dog Gait analysis Ground reaction forces Pressure plate AbbreviationsLWLevel walking

CS1Cross-slope 10°

CS2Cross-slope 15°

PFzPeak vertical force

IFzVertical impulse

USUp-slope

DSDown-slope

GRFGround reaction forces

ROMRange of motion

TFTotal force

M1First measurement

M2Second measurement

M3Third measurement.

Electronic supplementary materialThe online version of this article doi:10.1186-s12917-014-0241-4 contains supplementary material, which is available to authorized users.

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Autor: Therese Strasser - Christian Peham - Barbara A Bockstahler

Fuente: https://link.springer.com/







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