【目的】建立检测实验大鼠持续性主动注意力和冲动行为的实验系统。【方法】利用"五项选择连续反应时间任务"(5-choice serial reaction time task,5-CSRTT)的设计原理建立检测实验大鼠持续性主动注意力和冲动行为的实验系统...【目的】建立检测实验大鼠持续性主动注意力和冲动行为的实验系统。【方法】利用"五项选择连续反应时间任务"(5-choice serial reaction time task,5-CSRTT)的设计原理建立检测实验大鼠持续性主动注意力和冲动行为的实验系统。【结果】实验系统由实验箱及相应控制部分构成,并由微型电脑软件控制,能实现对大鼠相关行为的自动检测。【结论】所建立的实验系统能较好且真实地自动检测实验大鼠的持续性主动注意力和冲动行为,为注意缺陷多动障碍(ADHD)动物研究的进一步深入提供良好的条件。展开更多
目的探索5-HT2C受体在慢性间歇性饮酒导致的认知损害中的作用。方法建立小鼠慢性间歇性饮酒模型,采用5项选择连续反应时间任务(5-choice serial reaction time task,5-CSRTT)评估小鼠认知能力变化。定量检测小鼠内侧前额叶皮质(Medial P...目的探索5-HT2C受体在慢性间歇性饮酒导致的认知损害中的作用。方法建立小鼠慢性间歇性饮酒模型,采用5项选择连续反应时间任务(5-choice serial reaction time task,5-CSRTT)评估小鼠认知能力变化。定量检测小鼠内侧前额叶皮质(Medial Prefrontal Cortex,mPFC)中脑源性神经营养因子(Brain-Derived Neurotrophic Factor,BDNF)和5-羟色胺受体2C(5-Hydroxytryptamine Receptor 2C,5-HT2C)受体的表达。采用5-HT2C受体激动剂干预研究。结果模型小鼠血酒精浓度为(189.2±4.633)mg·dL-1,且饮酒组小鼠mPFC内BDNF(P<0.01)及5-HT2C受体(P<0.01)受体表达均下降。慢性间歇性饮酒可导致小鼠5-CSRTT准确率下降(P<0.01),遗漏率(P<0.01)和过早反应增加(P<0.01),而RO60-0175可逆转酒精引起的准确率下降(P<0.05),并减少饮酒导致的遗漏率增加(P<0.01),但对过早反应没有作用。结论慢性间歇性饮酒使小鼠冲动性增加的行为与mPFC内5-HT2C受体和BDNF的表达减少有关。展开更多
Purpose： This study aimed to investigate whether workload intensity modulates exercise-induced effect on reaction time （RT） performances, and more specifically to clarify whether cognitive control that plays a cruc...Purpose： This study aimed to investigate whether workload intensity modulates exercise-induced effect on reaction time （RT） performances, and more specifically to clarify whether cognitive control that plays a crucial role in rapid decision making is altered. Methods： Fourteen participants performed a Simon Task while cycling 20 min at a light （first ventilatory threshold, VT~ - 20%）, moderate （VTI）, or very hard （VTj ＋ 20%） level of exercise. Results： After 15 min of cycling, RTs are faster than during the first 5 min of exercise. This benefit does not fluctuate with the intensity of exercise and enlarges as RT lengthens. Despite a numerical difference suggesting a greater facilitation during moderate exercise （-16 ms） than during a light exercise （-10 ms）, the benefit is not statistically different. Interestingly, we did not observe any signs of worsening on RT or on accuracy during very hard exercise. Conclusion： Cognitive control is extremely robust and appears not to be affected by the intensity of exercise. The selective inhibition and the between-trials adjustments are effective from the beginning to the end of exercise, regardless of the workload output.展开更多
文摘【目的】建立检测实验大鼠持续性主动注意力和冲动行为的实验系统。【方法】利用"五项选择连续反应时间任务"(5-choice serial reaction time task,5-CSRTT)的设计原理建立检测实验大鼠持续性主动注意力和冲动行为的实验系统。【结果】实验系统由实验箱及相应控制部分构成,并由微型电脑软件控制,能实现对大鼠相关行为的自动检测。【结论】所建立的实验系统能较好且真实地自动检测实验大鼠的持续性主动注意力和冲动行为,为注意缺陷多动障碍(ADHD)动物研究的进一步深入提供良好的条件。
基金supported by a grant from the French Research Agency (ANR 2013-069)
文摘Purpose： This study aimed to investigate whether workload intensity modulates exercise-induced effect on reaction time （RT） performances, and more specifically to clarify whether cognitive control that plays a crucial role in rapid decision making is altered. Methods： Fourteen participants performed a Simon Task while cycling 20 min at a light （first ventilatory threshold, VT~ - 20%）, moderate （VTI）, or very hard （VTj ＋ 20%） level of exercise. Results： After 15 min of cycling, RTs are faster than during the first 5 min of exercise. This benefit does not fluctuate with the intensity of exercise and enlarges as RT lengthens. Despite a numerical difference suggesting a greater facilitation during moderate exercise （-16 ms） than during a light exercise （-10 ms）, the benefit is not statistically different. Interestingly, we did not observe any signs of worsening on RT or on accuracy during very hard exercise. Conclusion： Cognitive control is extremely robust and appears not to be affected by the intensity of exercise. The selective inhibition and the between-trials adjustments are effective from the beginning to the end of exercise, regardless of the workload output.
