Relationship Between Postural Stability and Paraspinal Muscle Adaptation in Lame Horses Undergoing Rehabilitation.

Journal of Equine Veterinary Science
Katherine L Ellis, Melissa R King

Abstract

Postural stability maintains balance, protects the spinal column, and allows accurate responses to destabilizing forces. The musculus multifidus (m. multifidus) is the major postural muscle located adjacent to the vertebrae along the length of the spinal column. Increased cross-sectional area (CSA) of the m. multifidus has been demonstrated in horses after a rehabilitation strengthening exercise program; however, correlation with functional postural stability has not been shown. The objective of the present study is to evaluate the relationship of the thoracolumbar m. multifidus CSA and measures of postural sway performance in lame horses undergoing rehabilitation exercises in clinical cases. Seven client-owned horses admitted to the equine rehabilitation service were included in the study. M. multifidus CSA was measured via ultrasonography at the start of a rehabilitation program (initial evaluation) and after 12 weeks of rehabilitation exercises (final evaluation). Postural sway data were also measured at initial and final evaluation. A significant increase in m. multifidus CSA was seen from initial to final evaluation. A moderate to strong correlation was present between m. multifidus CSA and postural sway variables. These r...Continue Reading

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