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首页> 外文期刊>Veterinary Anaesthesia and Analgesia >Effects of early human handling on the pain sensitivity of young lambs.
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Effects of early human handling on the pain sensitivity of young lambs.

机译：早期人类操作对幼小羊羔疼痛敏感性的影响。

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Objective: Pain sensitivity of lambs changes over the first weeks of life. However, the effects of early treatments such as human handling on pain sensitivity are unknown for this species. This study investigated the effects of regular early gentle human handling on the pain sensitivity of lambs, indicated by their behavioural responses to tail docking. Study design: Prospective part-blinded experimental study. Animals: Twenty-nine singleton Coopworth lambs (females n=14, males n=15). Methods: Starting at one day of age, lambs were either handled twice daily for 2 weeks (Handled), were kept in the presence of lambs who were being handled but were not handled themselves (Presence), or were exposed to a human only during routine feeding and care (Control). At 3 weeks of age, all lambs were tail docked using rubber rings. Changes in behaviour due to docking were calculated and change data were analyzed using two-way anova with treatment and test pen as main factors. Results: All lambs showed significant increases in the frequency and duration of behaviours indicative of pain, including 'abnormal' behaviours, and decreases in the frequency and duration of 'normal' behaviours after docking. Handled lambs showed a smaller increase in the time spent lying abnormally after docking than did Control lambs (mean transformed change in proportion of 30 minutes spent+or-SE: Control 0.55+or-0.04; Handled 0.38+or-0.03; Presence 0.48+or-0.03; C versus H t=3.45, p=0.007). Conclusions and clinical relevance: These results provide some evidence that handling early in life may reduce subsequent pain sensitivity in lambs. While the behavioural effects of handling on pain behaviour were subtle, the results suggest, at the very least, that early handling does not increase pain sensitivity in lambs and suggests there is still flexibility postnatally in the pain processing system of a precocial species.Digital Object Identifier http://dx.doi.org/10.1111/j.1467-2995.2012.00746.x
机译：目的：羔羊的疼痛敏感性在生命的最初几周发生变化。但是，该物种尚不知道诸如人类处理之类的早期治疗对疼痛敏感性的影响。这项研究调查了正常的早期轻柔人类操作对羔羊对疼痛敏感性的影响，这通过它们对尾巴停靠的行为反应来表明。研究设计：前瞻性部分盲实验研究。动物：二十九只单例库普沃斯羔羊（雌性n = 14，雄性n = 15）。方法：从一天大的时候开始，或者每天两次处理羔羊，持续2周（处理），将羔羊放在正在处理但自己不处理的羔羊面前（在场），或者仅在人类接触期间暴露于人类日常喂养和护理（对照）。在3周龄时，所有的小羊都用橡胶圈尾巴停靠。计算了由于对接而导致的行为变化，并使用双向方差分析（以处理和测试笔为主要因素）分析了变化数据。结果：所有羔羊的行为频率和持续时间都表明疼痛，包括“异常”行为，并且在停靠后“正常”行为的频率和持续时间显着增加。处理后的羔羊在对接后异常躺着的时间上的增加比对照羔羊的时间要小（平均花费30分钟的变化比例+或-SE：对照0.55+或-0.04;处理0.38+或-0.03;存在0.48+或-0.03; C对H t = 3.45，p = 0.007）。结论和临床意义：这些结果提供了一些证据，表明在生命早期进行处理可能会降低随后对羔羊的疼痛敏感性。尽管处理对疼痛行为的行为影响微妙，但结果至少表明，早期处理不会增加羔羊的疼痛敏感性，并且表明早熟物种的疼痛处理系统在出生后仍然具有灵活性。标识符http://dx.doi.org/10.1111/j.1467-2995.2012.00746.x

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