习得性无助系统由一个黑色的箱子和控制单位构成。箱子中配备电击功能的底板,系统中装有计时器,可设定时电击,随机电击;持续电击,间隔电击,也可以设计更复杂的电击方案,系统配有一个操作方便的报告软件,可以收集、输出数据。
大鼠小鼠都配有相应的动物笼。本系统可根据情况扩展,最多可4只动物同时进行实验。
当啮齿类动物处于不可逃避且无可预计的压力状态下,比如强迫游泳、电击,它们常常发展为记忆、学习能力减退(例如,逃避);同时习得性无助实验也常用于止痛药的副作用(例如,应激性镇痛)等研究。
习得性无助系统由一个黑色的箱子和控制单位构成。箱子中配备电击功能的底板,系统中装有计时器,可设定时电击,随机电击;持续电击,间隔电击,也可以设计更复杂的电击方案,系统配有一个操作方便的报告软件,可以收集、输出数据。
大鼠小鼠都配有相应的动物笼。本系统可根据情况扩展,最多可4只动物同时进行实验。
特征
|
优点 | |
随机电击模式 | 电击持续时间、间隔时间等随机 | |
通用性的触发电击 | 也可使用于 条件恐惧 |
小鼠实验箱: | 17 x17 x 20 (h) cm |
大鼠实验箱: | 22 x 22 x 20 (h) cm |
电击电流; | 0.1 -2.9 mA ,分辨率为0.1mA |
电击控制: | 5V TTL signals |
定时器: | 连接1-4个实验箱 |
Learned helplessness is behavior typical of an organism (human or animal) that has endured repeated painful or otherwise aversive stimuli which it was unable to escape or avoid: American psychologist Martin Seligman initiated research on learned helplessness in 1967 at the University of Pennsylvania as an extension of his interest in depression.
In animal studies, when rodents are exposed to inescapable and unpredictable stress, such as forced swim or inescapable footshock, they often develop deficits in memory and learning tasks (e.g. Active Avoidance), and they often show also analgesic reactions (S.I.A. Stress-Induced Analgesia).
In addition, psychologists have looked at the correlation of depression and anxiety with learned helplessness over the years. It has been shown that the symptoms shown with learned helplessness have corresponding symptoms in depression. The symptoms most felt when depressed are the feelings of helplessness and uncontrollability that have been correlated with learned helplessness.
Helplessness behavior is also studied in social settings: being repeatedly exposed to uncomfortable or painful situations, the person may believe that there is no use in trying to evade such situations. Another example of learned helplessness in social settings involves loneliness and shyness. Those who are extremely shy, passive, anxious and depressed may learn helplessness to offer stable explanations for unpleasant social experiences
47500 大鼠习得性无助系统,包括:
47502 大鼠笼
47510计时器
47554电击装置
46003-330 连接线
47510-302 说明书(CD)
E-WP 008 电源线
47550小鼠习得性无助系统,包括:
47503小鼠笼
其他配件与47500一致
{module Bibliography on 47500}
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