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ID:39362149
大小:490.61 KB
页数:44页
时间:2019-07-01
《rem睡眠剥夺对大鼠恐惧消退再现影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、照组大鼠放回鼠笼,训练6h后对6-12hRSD组大鼠进行REM睡眠剥夺;第四天在场景A中进行恐惧消退再现检测20min(无任何刺激呈现)。研究表明实验一和实验二两种任务不依赖于海马,实验三和实验四两种任务是海马依赖性的。在恐惧条件化、恐惧消退训练及消退再现检测阶段记录分析大鼠的僵直行为。结果:实验一:在恐惧条件化以及恐惧消退训练阶段,0-6hRSD组、6-12hRSD组与各自对照组大鼠的僵直水平组间差异都无显著性;在恐惧消退再现检测阶段,0-6hRSD组大鼠的僵直水平显著高于对照组,6-12hRSD组与对照组大鼠的僵直水平组间差异无显著性。实验二:在恐惧条件化以及恐惧消
2、退训练阶段,0-6hRSD组、6-12hRSD组与各自对照组大鼠的僵直水平组间差异都无显著性;在恐惧消退再现检测阶段,0-6hRSD组大鼠的僵直水平显著高于对照组,6-12hRSD组与对照组大鼠的僵直水平组间差异无显著性。实验三:在恐惧条件化、恐惧消退训练以及恐惧消退再现检测阶段,0-6hRSD组、6-12hRSD组与各自对照组大鼠的僵直水平组间差异都无显著性。实验四:在恐惧条件化、恐惧消退训练以及恐惧消退再现检测阶段,0-6hRSD组、6-12hRSD组与各自对照组大鼠的僵直水平组间差异都无显著性。结论:恐惧消退训练后的RSD对于恐惧消退记忆的影响是复杂的,RSD损害
3、海马非依赖性恐惧消退再现,而对海马依赖性任务没有影响,并且这种损害依赖于恐惧消退训练后睡眠剥夺的时段,进一步说明REM睡眠选择性参与特定任务的记忆过程。关键词:睡眠剥夺,恐惧消退,海马,场景,僵直,大鼠4EffectsofREMsleepdeprivationonrecalloffearextinctioninratsABSTRACTObjectives:Thepresentstudywastoexaminetheeffectsofpost-extinctionrapideyemovementsleepdeprivation(RSD)onrecalloffearexti
4、nction。Methods:Experiment1:OnDay1,ratsweretransportedtocontextAtohabituatethemtothecontext;OnDay2(fearconditioningphase),RatsreceivedfivepairingsoftoneandfootshockincontextA;Thenextday(extinctiontrainingphase),ratsreceivedtentone-aloneextinctiontrialsincontextA,immediately,0-6hRSDratswer
5、eplacedintheRSDapparatusand6-12hRSDratsandcontrolratswereplacedintheirhomecages,sixhourslater,6-12hRSDratswereplacedintheRSDapparatus;OnDay4(recalltestphase),ratsreceivedtenadditionalextinctiontrialsincontextA。Experiment2:OnDay1,ratsweretransportedtocontextAandcontextBtohabituatethemtoth
6、econtext;OnDay2(fearconditioningphase),ratsreceivedfivepairingsoftoneandfootshockincontextA;Thenextday(extinctiontrainingphase),ratsreceivedtentone-aloneextinctiontrialsincontextB,immediately,0-6hRSDratswereplacedintheRSDapparatusand6-12hRSDratsandcontrolratsweretransportedtotheirhomecag
7、es,sixhourslater,6-12hRSDratswereplacedintheRSDapparatus;OnDay4(recalltestphase),ratsreceivedtenadditionalextinctiontrialsincontextB。Experiment3:OnDay1,ratsweretransportedtocontextAandcontextBtohabituatethemtothecontext;OnDay2(fearconditioningphase),ratsreceivedfivepairin
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