不同的大脑活动对重复的愉快和不愉快气味的反应

IF 1 4区 医学 Q4 Neuroscience
Wei Xiao, Qianwen Lv, Xing Gao, Zhifu Sun, Xiaoguang Yan, Yongxiang Wei
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引用次数: 3

摘要

利用功能性磁共振成像(fMRI)研究了大脑对嗅觉刺激的反应,但对日常生活中常见的重复嗅觉信息的处理知之甚少。本功能磁共振成像研究旨在研究12名健康的右撇子志愿者对正效和负效气味反复刺激的大脑反应。两种气味(苯乙醇(PEA)和异戊酸(IVA))刺激模式相同,两次fMRI运行间隔25 min,两种气味交替释放。两种效价气味,尤其是负性气味,诱导的初级和次级嗅觉皮层区域的激活模式相似。大脑的激活减弱是对重复的愉快和不愉快气味的反应。然而,反复出现的难闻气味与梨状皮质、杏仁核和海马体的关系更为密切。我们的结论是,对反复气味刺激的不对称大脑激活取决于效价,令人不快的气味可以唤起更多的负面情绪和深刻的记忆。本研究首次应用功能磁共振成像(fMRI)研究了重复嗅觉信息的中枢加工过程,揭示了愉快和不愉快的重复气味对大脑激活的不对称反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Different Brain Activation in Response to Repeated Odors of Pleasantness and Unpleasantness

Different Brain Activation in Response to Repeated Odors of Pleasantness and Unpleasantness

Brain activation in response to olfactory stimuli has been studied using functional magnetic resonance imaging (fMRI), but there is little knowledge about processing repeated olfactory information which is usual in daily life.

This fMRI study was designed to investigate brain response to repeated odorant stimulation with positive and negative valences in 12 healthy right-handed volunteers. There was a 25-min rest interval between two fMRI runs with identical stimulation paradigms with two odors, as phenylethyl alcohol (PEA) and isovaleric acid (IVA), and the two odors were released alternately.

There was a similar activation pattern in regions of primary and secondary olfactory cortex induced by odors of both valences, especially by negative odor. Weakened activation of the brain is responsive to repeated both pleasant and unpleasant smell. Nevertheless, the repeated unpleasant odor has a more intimate relationship with the piriform cortex, amygdala, and hippocampus.

We conclude that asymmetric brain activation in response to repeated odorant stimulation depended on valences and that the unpleasant odor can evoke more negative emotion and profound memory.

We explore the central processing about repeated olfactory information applied fMRI for the first time, revealing asymmetric brain activation in response to repeated odors of pleasantness and unpleasantness.

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来源期刊
Chemosensory Perception
Chemosensory Perception 农林科学-神经科学
CiteScore
2.50
自引率
0.00%
发文量
8
审稿时长
>36 weeks
期刊介绍: Coverage in Chemosensory Perception includes animal work with implications for human phenomena and explores the following areas: Identification of chemicals producing sensory response; Identification of sensory response associated with chemicals; Human in vivo response to chemical stimuli; Human in vitro response to chemical stimuli; Neuroimaging of chemosensory function; Neurological processing of chemoreception; Chemoreception mechanisms; Psychophysics of chemoperception; Trigeminal function; Multisensory perception; Contextual effect on chemoperception; Behavioral response to chemical stimuli; Physiological factors affecting and contributing to chemoperception; Flavor and hedonics; Memory and chemoperception.
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