Twitching in Veterinary Procedures: How Does this Technique Subdue Horses?

This study investigates the mechanisms by which two forms of restraint (lip twitch and ear twitch) subdue horses. Prior research suggests that the lip twitch subdues horses through an analgesic effect; the mechanism of the ear twitch is unknown. Heart rate (HR) and heart rate variability (HRV) were measured to determine autonomic nervous system activity before and during application of the twitches, and salivary cortisol (SC) levels were analyzed to assess stress levels before and after application of the twitches.
Source: Journal of Veterinary Behavior: Clinical Applications and Research - Category: Veterinary Research Authors: Source Type: research