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作 者:周卫敏[1] 段卫邦 夏青青[1] 赵家伟[2] 谢凤梅[2] 段飞燕 梁晓艳[1] 童宗武[3] 吴春云[1]
机构地区:[1]昆明医科大学人体解剖学与组织胚胎学系,昆明650500 [2]昆明医科大学基础医学院2008级临床医学专业三大班,昆明650500 [3]昆明医科大学第六附属医院肾脏中心,昆明650500
出 处:《中华行为医学与脑科学杂志》2012年第11期976-978,共3页Chinese Journal of Behavioral Medicine and Brain Science
基 金:云南省应用基础研究面上项目(2009ZC097M)
摘 要:目的探讨急性高剂量和低剂量甲醇中毒大鼠平衡运动行为的变化规律。方法健康成年SD大鼠30只,应用通有混合气体(N2O/O2)的密闭有机玻璃箱并灌胃相应剂量甲醇溶液复制急性高剂量中毒大鼠和急性低剂量甲醇中毒大鼠①=10)。应用平衡木实验(BBT)和噪音横杆跑动实验(BWT)观测评价大鼠伤后平衡与运动学习记忆能力。结果(1)BBT实验结果显示:高剂量组、低剂量组在中毒后第1天平衡时间分别为(23.83±6.82)s,(59.54±0.46)s,与对照组[(60.00±0.00)s]比较,高剂量组明显缩短,差异具有统计学意义(P〈0.05)。(2)BwT实验结果显示:高剂量组、低剂量组在中毒后第1天步人潜伏期时间分别为(41.05±4.45)s,(25.26±5.80)s,与对照组[(4.60±0.19)s]相比,高剂量组与低剂量组在中毒后第1天步入潜伏期时间明显延长俨〈0.05),且高剂量组较低剂量组显著延长俨〈0.05);第2—5天高剂量组与低剂量组步入潜伏期时间较对照组显著延长(P〈0.05),但高、低剂量组之间差异无统计学意义。结论急性甲醇中毒大鼠存在平衡功能障碍和运动学习记忆功能障碍,平衡功能恢复较快,运动学习记忆功能恢复较慢。Objective To investigate the vestibulomotor behavioral changes in rats after acute methanol poisoning. Methods Animal models of acute methanol poisoning in rats were duplicated using a plexiglas cham- ber exposed to a mixture of N2 0/02. Vestibulomotor function was evaluated based on Beam Balance Test (BBT) and Beam Walking Test(BWT). Results (1) Reduced latency on the BBT was observed in the high methanol dosage group( (23.83 ±6.82)s versus the control group(60.00 s0.00) s, P〈0.05) and low methanol dosage group( (59.54 ±0.46)s) on the first day after the poisoning. (2) Compared with the control group( (4.60 ±0.19 )s ) , the step-through latency on BWT on the first clay of the high methanol dosage group ( (41.05 ±4.45 ) s ) and low methanol dosage group( (25.26 ±5.80 ) s) was markedly prolonged after the poisoning (P 〈 0.05 ). The latency for the high methanol dosage group was longer than the low methanol dosage group (P 〈 0.05 ) ; from 2 to 5 days, the step-through latency of the two model groups was longer than the control group (P 〈 0.05 ), but there was no significant difference between them. Conclusion Rats subjected to acute methanol poisoning show obvious balance dysfunction,motor learning and memory dysfunction. A faster recovery is observed in balance function as comparing to that of motor learning and memory.
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