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Day/Night Fixed Color Camera

日/夜固定彩色摄像机

Company: Panasonic
Catalog#: WV-CP304
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Sensitive Assessment of Hippocampal Learning Using Temporally Dissociated Passive Avoidance Task
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2016-06-05
[Abstract]  The temporally dissociated passive avoidance (TDPA) paradigm is a variant of passive avoidance testing, and allows for more sensitive investigation of mild impairments in avoidance learning. Passive avoidance learning measures the latency to enter a “dark” context in which an aversive stimulus (foot shock) has been previously experienced using a light-dark box paradigm. Briefly, the animal is placed into the light side of the box and the time spent to cross into the dark side is measured. After entry into the dark chamber, the animal receives a mild (0.4-1.6 mA) footshock and is removed from the box. After a period of time, typically 24 h (note that this is entirely dependent on whether various levels of memory retention, e.g., short or long, are being measured), the animal is ... [摘要]  时间分离的被动回避(TDPA)模式是被动回避测试的一个变体,允许对避免学习中的轻度损伤进行更敏感的调查。被动回避学习衡量潜伏期进入“黑暗”环境,在此背景下,使用暗黑盒子模式曾经使用过厌恶刺激(足震)。简而言之,将动物放置在盒子的光侧,并测量穿过黑暗面的时间。进入暗室后,动物接受轻度(0.4-1.6毫安)的脚蹬,并从箱子中取出。经过一段时间,通常为24小时(注意,这完全取决于是否测量各种记忆保留水平,例如短时间或长时间),将动物放回盒子中,并测量交叉潜伏期。被动避免在一次试用后被学习,并导致交叉延迟强劲增加。这种行为需要通常中性环境和厌恶刺激之间的关联,并且依赖于海马功能(Stubley-Weatherly等人,1996; Impey等人,1998)。 TDPA通过多次每日一次的试验来扩展这种学习,产生更分级和可延展的延迟评分,从而允许对海马功能变化进行更敏感的评估任务依赖于完整的海马(Zhang et al。,2008)和海马基因表达的微妙变化可导致TDPA潜伏期评分的强烈改变(Eagle et al。,2015)。我们在这里描述一种常用的评估小鼠TDPA学习的方法。

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