INNOVATIVE DIAGNOSTIC TECHNOLOGIES
investigated, it is likely that the Pegasus® and EquiMoves® systems would provide similar variable calculations as the XSens® system and the Lameness Locator®.
7. Clinical Use of IMUs
Until recently, IMUs have largely been utilized in a research setting. There have been several main rea- sons for their limited clinical use. First, the technol- ogy, both hardware and processing algorithms, had to be tested and validated. Second, an equine-specificsys- temhad to be developed as the first intensively investi- gated IMU system (XSens®) was designed for use in people and did not have equine-specificsoftware. Now, equine-specific systems are being designed and are being used clinically mostly within the European Union (Pegasus®,EquiMoves®). These and other simi- lar systems are likely to become more commercially availablemore globally in the next fewyears.
8. Conclusions
IMUs are sophisticated motion analysis devices that can provide both translational and rotational kinemat- ics of both the axial skeleton and limbs in horses. These sensors have already been used intensively in research settings to better understand the motions of horses during both ridden and unridden exercise. As sensor technology improves as has already begun to occur, it is likely that these devices will be able to pro- vide more kinematic information about distal limb motion, including the interaction of the hoof with the ground at high speeds. It is likely that these devices will provide a better understanding of equine motion, both for lameness and general gait analysis. Additionally, these systems are becoming more commercially available for clinical use, which will add another objective gait analysis tool for equine practitioners.
Acknowledgments
Declaration of Ethics The Author has adhered to the AVMA Principles of VeterinaryMedical Ethics.
Conflict of Interest The Author has no conflicts of interest.
References and Footnotes
1. Pfau T, Witte TH, Wilson AM. A method for deriving dis- placement data during cyclical movement using an inertial sensor. J Exp Biol 2005;208:2503–2514.
2. Pfau T, Robilliard JJ, Weller R, et al. Assessment of mild hindlimb lameness during over ground locomotion using lin- ear discriminant analysis of inertial sensor data. Equine Vet J 2007;39:407–413.
3. Olsen E, Andersen PH, Pfau T. Accuracy and precision of equine gait event detection duringwalkingwith limb and trunk mounted inertial sensors. Sensors (Basel) 2012;12:8145–8156.
348 2022 / Vol. 68 / AAEP PROCEEDINGS
4. Roepstorff L, Wiestner T, Weishaupt MA, et al. Comparison of microgyro-based measurements of equinemetatarsal/metacarpal bone to a high speed video locomotion analysis system during treadmill locomotion. TheVet J 2013;198:e157–e160.
5. Cruz AM, Maninchedda UE, Burger D, et al. Repeatability of gait pattern variables measured by use of extremity- mounted inertial measurement units in nonlame horses during trotting. Am J Vet Res 2017;78:1011–1018.
6. Bosch S, Braganca FS, Marin-Perianu M, et al. EquiMoves: A wireless networked inertial measurement system for objective examination of horse gait. Sensors 2018;18:850.
7. Moorman VJ, Kawcak CE, King MR. Evaluation of a porta- ble media device for use in determining postural stability in standing
horses.Am J Vet Res 2017;78:1036–1042.
8. Moorman VJ, King MR. Angular orientations derived from a portable media device to assess postural stability during quiet standing in the horse. Equine Vet Educ 2021;34:e198–e202.
9. Pfau T, Weller R. Comparison of a standalone consumer grade smartphone with a specialist inertial measurement unit for quantification of movement symmetry in the trot- ting horse. Equine Vet J 2017;49:124–129.
10. Marunova E, Dod L, Witte S, et al. Smartphone-based pelvic movement asymmetry measures for clinical decision making in equine lameness assessment. Animals 2021;11:1665.
11. Moorman VJ, Reiser RF,McIlwraith CW, et al. Validation of an equine inertialmeasurement unit system in normal horses over- ground at thewalk and
trot.AmJ VetRes 2012;73:1160–1170.
12. Pfau T, Boultbee H, Davis H, et al. Agreement between two inertial sensor gait analysis systems for lameness examina- tions in horses. Equine Vet Educ 2016;28:203–208.
13. Church EE, Walker AM, Wilson AM, et al. Evaluation of dis- criminant analysis based on dorsoventral symmetry indices to quantify hindlimb lameness during over ground locomo- tion in the horse. Equine Vet J 2009;41:304–308.
14. Pfau T, Starke SD, Troster S, et al. Estimation of vertical tuber coxae movement in the horse from a single inertial measurement unit. The Vet J 2013;198:498–503.
15. Greve L, Dyson S, Pfau T. Alterations in thoracolumbosacral movement when pain causing lameness has been improved by diagnostic analgesia. Vet J 2017;224:55–63.
16. MacKechnie-Guire R, MacKechnie-Guire E, Fairfax V, et al. The effect of tree width on thoracolumbar and limb kinemat- ics, saddle pressure distribution, and thoracolumbar dimen- sions in sport horses in trot and canter. Animals 2019;9:842.
17. MacKechnie R, Pfau T. Differential rotational movement and symmetry values of the thoracolumbosacral region in high-level dressage horses when trotting. PLoSONE 2021;16:e0251144.
18. Schwarz J, Vidondo B, Maninchedda UE, et al. Inter-evalua- tor and intra-evaluator reliability of a software program used to extract kinematic variables obtained by an extrem- ity-mounted inertial measurement unit system in sound horses at the trot under soft and hard ground conditions and treadmill exercise. Front Vet Sci 2021;8:595455.
19. Moorman VJ, Reiser RF, Mahaffey CA, et al. Use of an iner- tial measurement unit to assess the effect of equine forelimb lameness on three-dimensional hoof orientation at the walk and trot. Am J Vet Res 2014;75:800–808.
20. Sapone M, Martin P, Mansour KB, et al. The protraction and retraction angles of horse limbs: An estimation during trotting using inertial sensors. Sensors 2021;21:3792.
21. Serra Braganca FM, Bosch S, Voskamp JP, et al. Validation of distal limb mounted inertial measurement unit sensors for stride detection in Warmblood horses at walk and trot. Equine Vet J 2017;49:45–551.
aLameness Locator, Equinosis, LLC, Columbia,MO65203. bXSens MTW, XSens North America Inc, El Segundo, CA
90245. cGaitsmart PeLgasus, European Technologies for Business
Ltd., Codicote, UK. dEquiMoves, Inertia Technologies, Enschede, Netherlands. eiPhone, Apple Inc, Cupertino, CA 95014.
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