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Sensitivity and tolerance to the motor impairing effects of moderate doses of ethanol.

机译:对中等剂量乙醇的运动损伤作用的敏感性和耐受性。

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The present study assessed sensitivity and the development of tolerance to the motor impairing effects of moderate doses of ethanol, using an oscillating bar task. Adult male Wistar rats were trained for 5 consecutive days to stay on the oscillating bar for 120 s to avoid a 0.5-mA foot shock. On the 5 consecutive test days, animals were injected once a day with ethanol (ip: 1.0, 1.25, or 1.5 g/kg) and tested at 15 min intervals until recovery to the 120 s criterion. On test day 1, rats in the 1.5 g/kg group took significantly longer to recover (81+/-9 min; mean+/-S.E.M.) than did animals in the 1.25 (49+/-9 min) and 1.0 (29+/-5 min) g/kg groups. Tolerance developed to all doses by test day 3, with the 1.5, 1.25, and 1.0 g/kg groups reaching criterion in significantly shorter times (42+/-8, 31+/-5, and 18+/-2 min, respectively), as compared to test day 1. BACs associated with recovery time on test day 3, for the 1.5 g/kg group, were significantly higher than the BACs associated with recovery time on test day 1. The data suggest that the oscillating bar task can be used to measure the acute ataxic effects of ethanol, across a narrow range of moderate ethanol doses, and, as well, the development of tolerance to the motor impairing effects of these ethanol doses.
机译:本研究使用摆杆任务评估了对中等剂量乙醇的运动损伤作用的敏感性和耐受性的发展。对成年雄性Wistar大鼠进行连续5天训练,使其在振动棒上停留120 s,以避免0.5 mA的脚部电击。在连续的5天测试中,每天向动物注射乙醇(ip:1.0、1.25或1.5 g / kg),并每隔15分钟测试一次,直到恢复到120 s标准为止。在测试的第1天,1.5 g / kg组的大鼠(1.25 +/- 9分钟;平均值+/- SEM)的恢复时间比1.25(49 +/- 9分钟)和1.0(29+ / -5分钟)g / kg组。在第3天测试时,所有剂量的耐受性均已提高,1.5、1.25和1.0 g / kg组在较短的时间内达到标准(分别为42 +/- 8、31 +/- 5和18 +/- 2分钟) ),与第1天的测试时间相比。对于1.5 g / kg组,与第3天的恢复时间相关的BAC显着高于与第1天的恢复时间相关的BAC。数据表明,摆杆任务可用于在中等剂量的乙醇的狭窄范围内测量乙醇的急性共济作用,以及对这些乙醇剂量的运动损伤作用的耐受性的发展。

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