Gait abnormalities caused by selective anesthesia of the suprascapular nerve in horses

American Journal of Veterinary Research
Dustin V DevineMark E Payton

Abstract

To assess gait abnormalities associated with selective anesthesia of the suprascapular nerve (SSN) achieved by use of perineural catheterization and thereby determine the function of that nerve as it relates to gait in horses. 3 adult horses with no preexisting clinically apparent lameness at a walk. Each horse was anesthetized; the right SSN was exposed surgically for placement of a perineural catheter to permit delivery of 1 mL of 2% mepivacaine hydrochloride. Six hours after recovery from anesthesia, each horse was videotaped while walking (50-step data acquisition period) before and after administration of mepivacaine. Videotapes were reviewed and the proportion of abnormal steps before and after selective SSN anesthesia was assessed. A step was considered abnormal if a marked amount of scapulohumeral joint instability (ie, lateral luxation of the proximal portion of the humerus) was observed during the weight-bearing phase of the stride. Clinically apparent gait dysfunction was detected in all 3 horses following perineural administration of the local anesthetic agent. Anesthesia of the SSN resulted in scapulohumeral joint instability as evidenced by consistent lateral excursion of the shoulder region during the weight-bear...Continue Reading

Citations

Nov 9, 2016·Journal of the American Veterinary Medical Association·Anne-Laure EmondJean-Marie Denoix
Jan 18, 2017·Veterinary and Comparative Orthopaedics and Traumatology : V.C.O.T·Sina FreiAndrea S Bischofberger

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