SSS 2008-10-13
时间：2019-01-08 作者：英语课 分类：Scientific American(十)月
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.
We all know people who are completely unflappable, able to remain calm in the face of total calamity 1. Don’t you just hate those people? Well, a new study in the October 9th issue of the journal Neuron suggests that with a little practice, you could become one of them. Because researchers led by Nobel laureate Eric Kandel have taught mice how to be less skittish—training that physically 2 changes their brains.
A lot of scientists who study learning in animals make use of a kind of behavioral test that couples a sound [audio of a memorable 3 sound] with a stimulus 4, such as a mild foot shock. Over time, the furry 5 subjects figure out that the sound signals a coming shock. Kandel’s team turned that test on its head by using a sound [audio of a memorable sound] to signal safety. Mice trained in these tests show less anxiety when they hear their safety signal.
This learned safety, the scientists found, works just as well as a drug like Prozac to keep mice calm in stressful situations, such as being tossed into a pool of water, the rodent 6 equivalent of getting stuck in traffic. By studying how this training changes the brain, scientists may be able to devise new ways to treat anxiety in people. So, next time you’re stuck in traffic, just remember, [audio of same memorable sound].
Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.
- Even a greater natural calamity cannot daunt us. 再大的自然灾害也压不垮我们。
- The attack on Pearl Harbor was a crushing calamity.偷袭珍珠港(对美军来说)是一场毁灭性的灾难。
- He was out of sorts physically,as well as disordered mentally.他浑身不舒服，心绪也很乱。
- Every time I think about it I feel physically sick.一想起那件事我就感到极恶心。
- This was indeed the most memorable day of my life.这的确是我一生中最值得怀念的日子。
- The veteran soldier has fought many memorable battles.这个老兵参加过许多难忘的战斗。
- Regard each failure as a stimulus to further efforts.把每次失利看成对进一步努力的激励。
- Light is a stimulus to growth in plants.光是促进植物生长的一个因素。
- This furry material will make a warm coat for the winter.这件毛皮料在冬天会是一件保暖的大衣。
- Mugsy is a big furry brown dog,who wiggles when she is happy.马格斯是一只棕色大长毛狗，当她高兴得时候她会摇尾巴。