Volunteers were then played the sound of a drill while their brain activities were monitored by a scanner.
What Karibe found in the low-fear group was increased activity in regions of the brain responsible for auditory processing(听觉处理),which means,for these people,the sound of dental drills is no different from other sounds.
In the high-fear group,however,the brain area that was activated was different.It was a region called the left caudate nucleus,which is responsible for a number of duties,including learning,emotion and,most importantly,memory.This means that these volunteers not only heard the sound,but also they remembered it—they made associations between the sound of a drill and the anxiety it produced in the past,causing anxiety to bubble up again.
Unraveling(揭示) how brains react to the sounds of dentists’ drills could help scientists find ways of making patients more at ease,according to Karibe,since patients with anxiety about trips to the dentist might keep putting off their visits until they have more severe problems with their teeth.
But the best way to avoid the uncomfortable feeling of visiting the dentist is to keep your teeth healthy so you don’t have to go there too often.
25.According to the new findings,what makes people afraid of going to the dentist?
A.The pain of dental surgeries.
B.The sound of dentists’ drills.
【2016届高考英语二轮复习专项练习:Book7 阶段综合·检测训练(新人教版)】相关文章:
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练:第18组(含解析)
★ 2017届高考英语二轮复习大题冲关秘籍之日常交际用语大全:高考英语非谓语动词及其用法的常考点(含解析)
★ 安徽省淮南市2014高考英语一轮单项选择及文章训练(16)及答案
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练:第19组(含解析)
★ 2014届高考英语一轮复习课时作业(二十四)必修4Module 6《Unexplained Mysteries of the Natural World》(外研版)
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (66)
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (24)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21