SAEVA Proceedings 2015 | Page 37

South African Equine Veterinary Association Congress 2015  Protea Hotel  Stellenbosch countries without many conflicting differential diagnoses because the prevalence of true vertebral compression in ataxic horses is relatively higher. Additional techniques that have been used or proposed for evaluating horses with compressive myelopathy include electromyography of the cervical musculature (examining for presence of signs of local muscle denervation caused by grey matter or peripheral nerve disease), (Wijnberg et al. 2004). transtentorial magnetic stimulation (Nollet et al. 2004) and kinematic gait analysis,(Keegan et al. 2004) but such techniques require further validation before their widespread use is recommended. Ante-mortem diagnosis of CSM therefore has inherent problems and limitations (Olsen et al. 2014), of which the clinician should be aware, but a combination of tests and methodologies taken in the context of the signalment, history and comprehensive physical and neurological examinations likely optimises accurate diagnosis. References Hahn, C.N., et al.. (2008) Assessment of the utility of using intra- and intervertebral minimum sagittal diameter ratios in the diagnosis of cervical vertebral malformation in horses. Vet Radiol Ultrasound 49, 1-6. Keegan, K.G., et al. Detection of spinal ataxia using fuzzy clustering of body position uncertainty. Equine Vet J. 36: 712; 2004 Levine, J.M., et al. (2007) Confirmed and presumptive cervical vertebral compressive myelopathy in older horses: a retrospective study (1992-2004). J Vet Intern Med 21, 812-819. Moore, B.R., et al. (1994) Assessment of vertebral canal diameter and bony malformations of the cervical part of the spine in horses with cervical stenotic myelopathy. Am J Vet Res 55, 5-13. Nollet, H., et al. Transcranial magnetic stimulation: normal values of magnetic motor evoked potentials in 84 normal horses and influence of height, weight, age and sex. Equine Vet J. 36; 712, 2004 Olsen, E. et al. Rater agreement on gait assessment during neurologic examination of horses. J Vet Intern Med. 2014 Mar-Apr;28(2):630-8 Papageorges, M., et al. (1987) Radiographic and myelographic examination of the cervical vertebral column in 306 ataxic horses. Vet Radiol 28, 53. Rush, B.R. (1998) Spinal radiography and myelography. In: Current techniques in equine surgery and lameness, 2 edn., Eds: N.A. White and J.N. Moore, WB Saunders, Philadelphia. Van Biervliet, J. (2007) An evidence-based approach to clinical questions in the practice of equine neurology. Vet Clin North Am Equine Pract 23, 317-328. van Biervliet, J., et al. (2004) Evaluation of decision criteria for detection of spinal cord compression based on cervical myelography in horses: 38 cases (1981-2001). Equine Vet J 36, 14-20. Whitwell, K.E. and Dyson, S. (1987) Interpreting radiographs. 8: Equine cervical vertebrae. Equine Vet J 19, 8-14. Wijnberg, ID, et al. The role of electromyography in clinical diagnosis of neuromuscular locomotor problems in the horse. Equine vet J. 36: 718; 2004 Withers, J.M., et al. (2009) Radiographic anatomy of the articular process joints of the caudal cervical vertebrae in the horse on lateral and oblique projections. Equine Vet J 41, 895-902.jmc 37