Department of Animal and Food Sciences, 242 Townsend Hall, Newark, DE 19716, USA.
Res Vet Sci. 2012 Oct;93(2):960-4. doi: 10.1016/j.rvsc.2011.12.008. Epub 2012 Jan 4.
Evaluation of the loss of consciousness in poultry is an essential component in evaluating bird welfare under a variety of situations and applications. Many current approaches to evaluating loss of consciousness are qualitative and require observation of the bird. This study outlines a quantitative method for determining the point at which a bird loses consciousness. In this study, commercial broilers were individually anesthetized and the brain activity recorded as the bird became unconscious. A wireless EEG transmitter was surgically implanted and the bird anesthetized after a 24-48 h recovery. Each bird was monitored during treatment with isoflurane anesthesia and EEG data was evaluated using a frequency based approach. The alpha/delta (A/D) ratio and loss of posture (LOP) were used to determine the point at which the birds went unconscious. There was no statistically significant difference between time to unconsciousness as measured by A/D ratio or LOP.
评估家禽的意识丧失是评估各种情况下鸟类福利的一个重要组成部分。目前许多评估意识丧失的方法都是定性的，需要观察鸟类。本研究概述了一种定量方法，用于确定鸟类失去意识的时间点。在这项研究中，商业肉鸡被单独麻醉，当鸟类失去意识时记录大脑活动。手术后植入了一个无线 EEG 发射器，鸟类在 24-48 小时的恢复期后被麻醉。在异氟烷麻醉下监测每只鸟的治疗情况，并使用基于频率的方法评估 EEG 数据。阿尔法/德尔塔（A/D）比值和姿势丧失（LOP）用于确定鸟类失去意识的时间点。A/D 比值或 LOP 测量的无意识时间没有统计学差异。
