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Reasons for performing study A quantifiable measure of muscle activity related to the cervical spine may provide further understanding and evidence based support for chiropractic techniques. Surface electromyography (sEMG) is a noninvasive method of measuring muscle activity of the splenius muscle when the horse is at rest. Objectives To determine if there is a relationship between objective measurable muscle parameters and misalignments and muscle tension in the equine cervical spine. Study design Controlled paired randomised study. Methods Privately owned horses (n = 14), of mixed sex, age and mean height 157.8 cm were selected and assigned a group by matching work, management regime, age, sex and breed. The treatment group (n = 7) underwent manual chiropractic treatment following palpation. The control group underwent palpation only. A Delsys 4 sensor system was used for data collection. Probes were positioned on the muscle halfway between C1/C2 joint and the crest on the left and right sides, between the tendon insertion and the motor point to maximise signals. sEMG readings were taken at immediately before (0) and after palpation (PP) and 30 min later (30). Data were tested for normality and variance by one-way ANOVA and paired t test. Results Post treatment, there was a significant decrease (P |
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