动物实验 z-bo 2020-08-17 536

　　Why is it so difficult to remember childhood memories? New research suggests that neurogenesis or the production of new neurons may play an important role in this "child amnesia." There are many kinds, including humans. Neurons are always produced in the hippocampus of the brain to form new memories, so researchers want to know whether this continuous integration of new neurons will relocate brain connections, thereby shaking old connections. I would like to know. Don't forget to bring forgetfulness. Catherine Acres and colleagues showed that this phenomenon also occurs in mice, guinea pigs, and small rodents called "octapods." The researchers used light electric shocks to train a group of mice to fear specific environments. They have allowed some of the mice to touch the steering wheel, because rotation has been shown to naturally increase the level of neurogenesis.

　　When Acres and his colleagues later put these rats back in an environment that was trained to generate fear, those rats with running experience almost forgot the fear and had nothing to do with fear. To understanding. The mice seem to be able to recall the recent electric shock well. Later, researchers used drugs to reduce neurogenesis in infant mice. Baby mice generally have higher levels of neuron production than adult mice, and these mice have been found to be faster. Corresponding infant mice without drugs retain better memory. Akers and colleagues finally tested the effects of neurogenesis on amnesia in guinea pigs and 8-dented mice. These animals have mature neurons at birth and less neurogenesis in infancy.

　　They found that guinea pigs and octagonal babies are as scary as mice.