The Influence of Age on Brain Processing of Odors in Adolescent Girls

IF 1 4区医学 Q4 Neuroscience Chemosensory Perception Pub Date : 2017-08-02 DOI:10.1007/s12078-017-9232-8

Pengfei Han, Cornelia Hummel, Hannah Hitzler, Johannes Gerber, Valentin Schriever, Thomas Hummel

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Abstract

Brain processing of odorants in different stages during adolescence is not well understood. This study aimed to investigate differences in brain processing of pleasant and unpleasant odors between adolescent girls at different ages.

Eleven girls aged 9–10?years and 20 girls aged 15–16?years participated in an fMRI study (1.5?T, repetition time 2.5?s) where two odorants (peach and n-butanol) were delivered passively to the participants’ nostrils. Psychophysical measurements for odor intensity, pleasantness, and familiarity were recorded.

Compared to older ones, younger girls were less familiar with peach odor. Stronger brain activation of piriform cortex, amygdala, bilateral insular cortex, anterior cingulate cortex, and dorsal striatum (caudate and putamen) was observed in younger vs. older girls, whereas in older girls there was no superior activation in olfactory regions as compared to younger participants.

The findings demonstrating differences of brain activation patterns between girls of two age groups may reflect olfactory perception development during adolescence.

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年龄对青春期女孩气味脑加工的影响

大脑在青春期不同阶段对气味的处理尚不清楚。本研究旨在探讨不同年龄的青春期女孩对愉快气味和不愉快气味处理的差异。11个9-10岁的女孩?15-16岁的20岁女孩?参与fMRI研究的年龄(1.5?T，重复时间2.5秒)，其中两种气味(桃子和正丁醇)被动地传递到参与者的鼻孔。记录了气味强度、愉悦度和熟悉度的心理物理测量。与年长的女孩相比，年轻的女孩对桃子的气味不太熟悉。年轻女孩比年长女孩的梨状皮质、杏仁核、双侧岛叶皮质、前扣带皮质和背纹状体(尾状核和壳核)的大脑激活更强，而年长女孩的嗅觉区域没有比年轻女孩更强的激活。研究结果表明，两个年龄组的女孩大脑活动模式的差异可能反映了青春期嗅觉知觉的发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemosensory Perception 农林科学-神经科学

CiteScore

2.50

自引率

0.00%

发文量

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.